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735 lines
27 KiB
HTML
<div id="wiki-wrapper" class="page">
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<div id="head">
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<h1 class="instapaper_title">API Reference</h1>
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<ul class="wiki-actions readability-extra">
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<li class="gollum-minibutton">
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<a href="/phayes/geoPHP/wiki/API-Reference/_history"
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class="minibutton bigger action-page-history">
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<span>Page History</span>
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</a>
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</li>
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</ul>
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</div>
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<div id="wiki-content">
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<div class="wrap">
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<div id="wiki-body" class="gollum-mediawiki-content instapaper_body">
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<div class="markdown-body">
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<table class="toc" summary="Contents">
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<tr>
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<td>
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<div>Table of Contents</div>
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<ul>
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<ul>
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<li>
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<a href="#wiki-geoPHP_static_class" rel="nofollow">geoPHP static class</a>
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<ul>
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<li>
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<a href="#wiki-Example" rel="nofollow">Example</a>
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</li>
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<li>
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<a href="#wiki-Static_Methods" rel="nofollow">Static Methods</a>
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</li>
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</ul>
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</li>
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<li>
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<a href="#wiki-Adapters" rel="nofollow">Adapters</a>
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<ul>
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<li>
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<a href="#wiki-Class_Hierarchy" rel="nofollow">Class Hierarchy</a>
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</li>
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<li>
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<a href="#wiki-Example-2" rel="nofollow">Example</a>
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</li>
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<li>
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<a href="#wiki-Methods" rel="nofollow">Methods</a>
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</li>
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</ul>
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</li>
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<li>
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<a href="#wiki-Geometries" rel="nofollow">Geometries</a>
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<ul>
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<li>
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<a href="#wiki-Class_Hierarchy-2" rel="nofollow">Class Hierarchy</a>
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</li>
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<li>
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<a href="#wiki-Example-3" rel="nofollow">Example</a>
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</li>
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<li>
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<a href="#wiki-Methods-2" rel="nofollow">Methods</a>
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</li>
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</ul>
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</li>
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</ul>
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</ul>
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</td>
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</tr>
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</table>
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<h2>
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<span class="mw-headline">
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<a name="wiki-geoPHP_static_class" rel="nofollow">geoPHP static class</a>
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</span>
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</h2>
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<p>geoPHP provides a static class that contains useful utility functions. All methods must
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be called statically. </p>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Example" rel="nofollow">Example</a>
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</span>
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</h3>
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<pre>$geometry = geoPHP::load('MULTILINESTRING((10 10,20 20,10 40))','wkt');</pre>
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<pre>$reduced_geometry = geoPHP::geometryReduce($geometry);</pre>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Static_Methods" rel="nofollow">Static Methods</a>
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</span>
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</h3>
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<table>
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<tr>
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<td>
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<b>Method</b>
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</td>
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<td>
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<b>Description</b>
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</td>
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<td>
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<b>Returns</b>
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</td>
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</tr>
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<tr>
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<td> version </td>
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<td> Provides the current geoPHP version. Useful if you need to check compatablity </td>
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<td> Numeric String </td>
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</tr>
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<tr>
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<td> load </td>
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<td> Load from an adapter format (like wkt) into a geometry. The first argument is the
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data, the second one is the format of the data
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('wkt','wkb','json','kml','gpx','google_geocode'). All additional arguments are
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passed along to the read method of the relevant adapte </td>
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<td> Geometry </td>
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</tr>
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<tr>
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<td> getAdapterMap </td>
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<td> Get a list of adapters as an array keyed by the value that should be passed to
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geoPHP::load </td>
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<td> Array </td>
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</tr>
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<tr>
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<td> geometryList </td>
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<td> List all geometry types </td>
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<td> Array </td>
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</tr>
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<tr>
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<td> geosToGeometry </td>
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<td> Given a GEOSGeometry, get a geoPHP geometry </td>
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<td> Geometry </td>
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</tr>
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<tr>
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<td> geometryReduce </td>
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<td> Reduce a geometry, or an array of geometries, into their \'lowest\' available
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common geometry. For example a GeometryCollection of only points will become a
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MultiPoint, while a multi-point containing a single point will return a point. An
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array of geometries can be passed and they will be compiled into a single geometry. </td>
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<td> Geometry </td>
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</tr>
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<tr>
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<td> geosInstalled </td>
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<td> Check if the GEOS php extension is installed and working </td>
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<td> Boolean </td>
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</tr>
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</table>
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<h2>
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<span class="mw-headline">
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<a name="wiki-Adapters" rel="nofollow">Adapters</a>
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</span>
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</h2>
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<p>Adapters are responsible for getting data in and out of geoPHP Geometries. Generally
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you will use an adapter to load data into a geoPHP geometry, do various manipulations on
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the geometry, then use another adapter to write it out to another (or the same) format.
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You can also use adapters by themselves to simply do conversion from one format to
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another (See <a class="internal present"
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href="/phayes/geoPHP/wiki/Example-format-converter" rel="nofollow"
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>example-format-converter</a> for an example of this). Adapters should be instantiated
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and not called statically. </p>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Class_Hierarchy" rel="nofollow">Class Hierarchy</a>
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</span>
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</h3>
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<ul>
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<li>GeoAdapter Abtract Class<ul>
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<li>WKT Enables reading and writing WKT (Well Known Text)</li>
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<li>WKB Enables reading and writing WKB (Well Known Binary). This is very fast.</li>
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<li>GeoJSON Enables reading and writing GeoJSON</li>
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<li>KML Enables reading and writing KML (Google Earth)</li>
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<li>GoogleGeocode Enables geocoding and reverse-geocoding via google geocoding
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API</li>
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<li>GPX Enables reading and writing GPX (from handheld GPS devices)</li>
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<li>GeoRSS Enables reading and writing of GeoRSS</li>
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</ul>
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</li>
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</ul>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Example-2" rel="nofollow">Example</a>
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</span>
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</h3>
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<pre>$wkb_reader = new WKB();</pre>
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<pre>$geometry = $wkb_reader->read('0101000000000000000000f03f000000000000f03f',TRUE);</pre>
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<pre>$wkt_writer = new wkt();</pre>
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<pre>$wkt = $wkt_writer->write($geometry);</pre>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Methods" rel="nofollow">Methods</a>
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</span>
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</h3>
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<table>
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<tr>
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<td>
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<b>Method</b>
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</td>
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<td>
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<b>Description</b>
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</td>
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<td>
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<b>Returns</b>
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</td>
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</tr>
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<tr>
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<td> read </td>
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<td> Read in input (generally a string) and return a Geometry </td>
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<td> Geometry </td>
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</tr>
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<tr>
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<td> write </td>
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<td> Write out the given geometry into the adapter formater </td>
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<td> String </td>
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</tr>
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</table>
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<h2>
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<span class="mw-headline">
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<a name="wiki-Geometries" rel="nofollow">Geometries</a>
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</span>
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</h2>
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<p>Geometries form the heart of the geoPHP library. Once you have loaded your data into a
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Geometry object, you have access to all the various methods detailed below for doing
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conversions, transformations, and operations. While generally you would use an adapter
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to get a Geometry object, they can also be built by hand. See the constructor methods in
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the classes to see how to do this. GEOS-php extension needs to be installed in order to
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use some of the advanced methods (detailed below). </p>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Class_Hierarchy-2" rel="nofollow">Class Hierarchy</a>
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</span>
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</h3>
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<ul>
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<li>Geometry<ul>
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<li>Point</li>
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<li>Collection<ul>
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<li>LineString</li>
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<li>Polygon</li>
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<li>MultiLineString</li>
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<li>MultiPoint</li>
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<li>MultiPolygon</li>
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<li>GeometryCollection</li>
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</ul>
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</li>
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</ul>
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</li>
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</ul>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Example-3" rel="nofollow">Example</a>
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</span>
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</h3>
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<pre>$poly1 = $geoPHP::load('POLYGON((30 10,10 20,20 40,40 40,30 10))','wkt');</pre>
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<pre>$poly2 = $geoPHP::load('POLYGON((35 10,10 20,15 40,45 45,35 10),(20 30, 35 35, 30 20, 20 30))','wkt');</pre>
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<pre>$combined_poly = $poly1->union($poly2);</pre>
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<pre>$kml = $combined_poly->out('kml');</pre>
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<h3>
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<span class="mw-headline">
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<a name="wiki-Methods-2" rel="nofollow">Methods</a>
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</span>
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</h3>
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<p>
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<b>Common Methods</b>
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</p>
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<table>
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<tr>
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<td>
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<b>Method</b>
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</td>
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<td>
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<b>Description</b>
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</td>
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<td>
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<b>Returns</b>
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</td>
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</tr>
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<tr>
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<td> out </td>
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<td> Outputs the geometry into the specified adapter format. Available formats are
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<i>wkt</i>, <i>wkb</i>, <i>json</i>, <i>kml</i>, <i>gpx</i>, <i>google_geocode</i>
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</td>
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<td> String </td>
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</tr>
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<tr>
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<td> area </td>
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<td> The area of this Polygon (or GeometryCollection), as measured in the spatial
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reference system of the geometry </td>
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<td> Float </td>
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</tr>
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<tr>
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<td> boundary </td>
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<td> Returns the closure of the combinatorial boundary of this geometric object. </td>
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<td> LinearRing </td>
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</tr>
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<tr>
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<td> envelope </td>
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<td> The minimum bounding box for this Geometry, returned as a Geometry. </td>
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<td> Polygon </td>
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</tr>
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<tr>
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<td> getBBox </td>
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<td> The minimum bounding box for this Geometry, returned as an array. Also see
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envelope() </td>
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<td> Array </td>
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</tr>
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<tr>
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<td> centroid </td>
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<td> The mathematical centroid for this geometry as a Point. For polygons, the result
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is not guaranteed to be interior. </td>
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<td> Point </td>
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</tr>
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<tr>
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<td> length </td>
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<td> The length of this Curve in its associated spatial reference. </td>
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<td> Float </td>
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</tr>
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<tr>
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<td> y </td>
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<td> The y-coordinate value for this Point. </td>
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<td> Float </td>
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</tr>
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<tr>
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<td> x </td>
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<td> The x-coordinate value for this Point. </td>
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<td> Float </td>
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</tr>
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<tr>
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<td> numGeometries </td>
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<td> The number of component geometries in this collection </td>
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<td> Integer </td>
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</tr>
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<tr>
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<td> geometryN </td>
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<td> Returns the geometry N in this collection. Note that the index starts at 1. </td>
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<td> Geometry </td>
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</tr>
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<tr>
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<td> startPoint </td>
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<td> The start Point of this LineString </td>
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<td> Point </td>
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</tr>
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<tr>
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<td> endPoint </td>
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<td> The end Point of this LineString </td>
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<td> Point </td>
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</tr>
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<tr>
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<td> isRing </td>
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<td> Returns 1 (TRUE) if this Curve is closed() and this Curve isSimple(). </td>
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<td> Boolean </td>
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</tr>
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<tr>
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<td> isClosed </td>
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<td> Returns 1 (TRUE) if this Curve is closed. StartPoint() == EndPoint(). </td>
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<td> Boolean </td>
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</tr>
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<tr>
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<td> getComponents </td>
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<td> Get all sub-geometry components of the geometry </td>
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<td> Array of geometries </td>
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</tr>
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<tr>
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<td> numPoints </td>
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<td> The number of Points in this LineString </td>
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<td> Integer </td>
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</tr>
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<tr>
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<td> pointN </td>
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<td> Returns the specified Point N in this LineString. Note that the index starts at
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1. </td>
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<td> Point </td>
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</tr>
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<tr>
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<td> exteriorRing </td>
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<td> Returns the exterior ring of this Polygon. </td>
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<td> LineString </td>
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</tr>
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<tr>
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<td> numInteriorRings </td>
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<td> Returns the number of interior rings in this Polygon. </td>
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<td> Integer </td>
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</tr>
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<tr>
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<td> interiorRingN </td>
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<td> Returns the Nth interior ring for this Polygon as a LineString. Note that the
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index starts at 1. </td>
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<td> LineString </td>
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</tr>
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<tr>
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<td> dimension </td>
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<td> The inherent dimension of this geometric object. In non-homogeneous collections,
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this will return the largest topological dimension of the contained objects. </td>
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<td> Integer </td>
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</tr>
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<tr>
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<td> geometryType </td>
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<td> Returns the name of the instantiable subtype of Geometry of which this geometric
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object is an instantiable member. The name of the subtype of Geometry is returned as
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a string. </td>
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<td> String </td>
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</tr>
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<tr>
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<td> SRID </td>
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<td> Returns the Spatial Reference System ID for this geometric object. </td>
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<td> integer </td>
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</tr>
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<tr>
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<td> setSRID </td>
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<td> Set the Spatial Reference System ID for this geometric object. </td>
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<td> NULL </td>
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</tr>
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<tr>
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<td> asArray </td>
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<td> Get the given geometry as an array of components (recursive) </td>
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<td> Array </td>
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</tr>
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<tr>
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<td> getGeoInterface </td>
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<td> Get the geometryType and Coordinates as an array </td>
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<td> Array </td>
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</tr>
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</table>
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<p>
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<b>Aliases</b>
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</p>
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<table>
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<tr>
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<td>
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<b>Method</b>
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</td>
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<td>
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<b>Description</b>
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</td>
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<td>
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<b>Returns</b>
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</td>
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</tr>
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<tr>
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<td> getCentroid </td>
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<td> Alias for centroid() </td>
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<td> Point </td>
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</tr>
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<tr>
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<td> getArea </td>
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<td> Alias for area() </td>
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<td> Float </td>
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</tr>
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<tr>
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<td> getX </td>
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<td> Alias for x() </td>
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<td> Float </td>
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</tr>
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<tr>
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<td> getY </td>
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<td> Alias for y() </td>
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<td> Float </td>
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</tr>
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<tr>
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<td> getGeos </td>
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<td> Alias for geos() </td>
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<td> GEOSGeometry </td>
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</tr>
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<tr>
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<td> getGeomType </td>
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<td> Alias for geometryType() </td>
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<td> String </td>
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</tr>
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<tr>
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<td> getSRID </td>
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<td> Alias for SRID() </td>
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<td> Integer </td>
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</tr>
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<tr>
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<td> asText </td>
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<td> Alias for <i>$this->out('wkt')</i>
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</td>
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<td> String </td>
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</tr>
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<tr>
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<td> asBinary </td>
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<td> Alias for <i>$this->out('wkb')</i>
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</td>
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<td> String </td>
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</tr>
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</table>
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<p>
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<b>Advanced Methods</b>
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</p>
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<p>The <a class="internal present" href="/phayes/geoPHP/wiki/GEOS" rel="nofollow">GEOS-php
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extension</a> needs to be installed for these functions to be available </p>
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<table>
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<tr>
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<td>
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<b>Method</b>
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</td>
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<td>
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<b>Description</b>
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</td>
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<td>
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<b>Returns</b>
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</td>
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</tr>
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<tr>
|
|
<td> geos </td>
|
|
<td> Return a GEOSGeometry object representing this geometry </td>
|
|
<td> GEOSGeometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> setGeos </td>
|
|
<td> Set a GEOSGeometry object representing this geometry </td>
|
|
<td> NULL </td>
|
|
</tr>
|
|
<tr>
|
|
<td> pointOnSurface </td>
|
|
<td> A Point guaranteed to be within a polygon </td>
|
|
<td> Point </td>
|
|
</tr>
|
|
<tr>
|
|
<td> equals </td>
|
|
<td> Returns 1 (TRUE) if this geometry is “spatially equal” to another Geometry </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> equalsExact </td>
|
|
<td> Returns 1 (TRUE) if this gemometric object is exactly the same as another object,
|
|
including the ordering of component parts </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> relate </td>
|
|
<td> Returns 1 (TRUE) if this geometric object is spatially related to anotherGeometry
|
|
by testing for intersections between the interior, boundary and exterior of the two
|
|
geometric objects as specified by the values in the intersectionPatternMatrix. This
|
|
returns FALSE if all the tested intersections are empty except exterior (this)
|
|
intersect exterior (another). </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> checkValidity </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> isSimple </td>
|
|
<td> Returns 1 (TRUE) if this geometry does not pass through the same point in space
|
|
more than once </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> project </td>
|
|
<td> Project the geometry from from one SRID to another </td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> buffer </td>
|
|
<td> Returns a geometric object that represents all Points whose distance from this
|
|
geometric object is less than or equal to distance. Calculations are in the spatial
|
|
reference system of this geometric object. Because of the limitations of linear
|
|
interpolation, there will often be some relatively small error in this distance, but
|
|
it should be near the resolution of the coordinates used. </td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> intersection </td>
|
|
<td> Returns a geometric object that represents the Point set intersection of this
|
|
geometric object with anotherGeometry. See <a
|
|
href="http://en.wikipedia.org/wiki/Intersection_(set_theory)" rel="nofollow"
|
|
>http://en.wikipedia.org/wiki/Intersection_(set_theory)</a>
|
|
</td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> convexHull </td>
|
|
<td> Returns a geometric object that represents the convex hull of this geometric
|
|
object. See <a href="http://en.wikipedia.org/wiki/Convex_hull" rel="nofollow"
|
|
>http://en.wikipedia.org/wiki/Convex_hull</a>
|
|
</td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> difference </td>
|
|
<td> Returns a geometric object that represents the Point set difference of this
|
|
geometric object with anotherGeometry. </td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> symDifference </td>
|
|
<td> Returns a geometric object that represents the Point set symmetric difference of
|
|
this geometric object with another Geometry. See <a
|
|
href="http://en.wikipedia.org/wiki/Symmetric_difference" rel="nofollow"
|
|
>http://en.wikipedia.org/wiki/Symmetric_difference</a>
|
|
</td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> union </td>
|
|
<td> Returns a geometric object that represents the Point set union of this geometric
|
|
object with anotherGeometry. See <a
|
|
href="http://en.wikipedia.org/wiki/Union_(set_theory)" rel="nofollow"
|
|
>http://en.wikipedia.org/wiki/Union_(set_theory)</a>
|
|
</td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> simplify </td>
|
|
<td> Simplify the geometry </td>
|
|
<td> Geometry </td>
|
|
</tr>
|
|
<tr>
|
|
<td> disjoint </td>
|
|
<td> Returns 1 (TRUE) if this geometric object is “spatially disjoint” from another
|
|
Geometry. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> touches </td>
|
|
<td> Returns 1 (TRUE) if this geometric object “spatially touches” another Geometry. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> intersects </td>
|
|
<td> Returns 1 (TRUE) if this geometric object “spatially intersects” another
|
|
Geometry. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> crosses </td>
|
|
<td> Returns 1 (TRUE) if this geometric object “spatially crosses? another Geometry. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> within </td>
|
|
<td> Returns 1 (TRUE) if this geometric object is “spatially within” another Geometry. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> contains </td>
|
|
<td> Returns 1 (TRUE) if this geometric object “spatially contains” another Geometry. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> overlaps </td>
|
|
<td> Returns 1 (TRUE) if this geometric object “spatially overlaps” another Geometry. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> covers </td>
|
|
<td> Alias for contains() </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> coveredBy </td>
|
|
<td> Alias for within() </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> distance </td>
|
|
<td> Returns the shortest distance between any two Points in the two geometric objects
|
|
as calculated in the spatial reference system of this geometric object. Because the
|
|
geometries are closed, it is possible to find a point on each geometric object
|
|
involved, such that the distance between these 2 points is the returned distance
|
|
between their geometric objects. </td>
|
|
<td> Float </td>
|
|
</tr>
|
|
<tr>
|
|
<td> hausdorffDistance </td>
|
|
<td> See <a href="http://en.wikipedia.org/wiki/Hausdorff_distance" rel="nofollow"
|
|
>http://en.wikipedia.org/wiki/Hausdorff_distance</a>
|
|
</td>
|
|
<td> Float </td>
|
|
</tr>
|
|
</table>
|
|
<p>
|
|
<b>Placeholders</b>
|
|
</p>
|
|
<p>These methods are part of the specification, but are not really supported by geoPHP. </p>
|
|
<table>
|
|
<tr>
|
|
<td>
|
|
<b>Method</b>
|
|
</td>
|
|
<td>
|
|
<b>Description</b>
|
|
</td>
|
|
<td>
|
|
<b>Returns</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td> hasZ </td>
|
|
<td> returns FALSE. geoPHP does not support Z values at the moment. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> is3D </td>
|
|
<td> returns FALSE. geoPHP does not support 3D geometries at the moment. </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> isMeasured </td>
|
|
<td> returns FALSE. geoPHP does not yet support M values </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> isEmpty </td>
|
|
<td> returns FALSE. geoPHP does not yet support empty geometries </td>
|
|
<td> Boolean </td>
|
|
</tr>
|
|
<tr>
|
|
<td> coordinateDimension </td>
|
|
<td> returns 2. geoPHP only supports 2-dimentional space </td>
|
|
<td> Integer </td>
|
|
</tr>
|
|
<tr>
|
|
<td> z </td>
|
|
<td> returns NULL. geoPHP does not support Z values at the moment </td>
|
|
<td> NULL </td>
|
|
</tr>
|
|
<tr>
|
|
<td> m </td>
|
|
<td> returns NULL. geoPHP does not support M values </td>
|
|
<td> NULL </td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|