[OpenLayers-Users] GeoJSON Fill Colors

[Nicholas Efremov-Kendall]

hi,

you can set an external stylemap and then color the polygons individually by
attribute.

On Mon, Jun 20, 2011 at 7:35 AM, pday <pday at mitre.org> wrote:

> Hello,
>
> I am trying to pass in GeoJSON to a simple proof of concept mapping
> example.
> What I am hoping to do is pass a single GeoJSON file (hard-coded below only
> for demo's sake, will be read in soon), with multiple polygons of different
> colors.
>
> Can this be done in a single GeoJSON file or am I restricted to coloring
> them all the same per file? I tried setting the fillColor property under
> each polygon in the featurecollection below but was unsuccessful.
>
> My init() function is below that sets the map and parses two simple
> polygons. Thank you
>
> -Pat
>
>  function init(){
>            map = new OpenLayers.Map( 'map' );
>            layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
>                    "http://vmap0.tiles.osgeo.org/wms/vmap0",
>                    {layers: 'basic'} );
>            map.addLayer(layer);
>            map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
>            var featurecollection = {
>              "type": "FeatureCollection",
>              "features": [
>                {"geometry": {
>                    "type": "GeometryCollection",
>                    "geometries": [
>                                                {
>                                                        type: "Polygon",
>                                                        coordinates:
>                                                        [[
>                                                                [-14.7656,
>  73.0309],
>                                                                [-30.2344,
> 46.0929],
>                                                                [-9.8438,
> -47.9709],
>                                                                [-94.9219,
> -59.1614],
>                                                                [-124.4531,
> -18.6194],
>                                                                [-155.3906,
> 45.6031],
>                                                                [-137.1094,
> 75.3272]
>                                                        ]]
>                                                },
>                                                {
>                                                        type: "Polygon",
>                                                        coordinates:
>                                                        [[
>                                                                [-106.1719,
> -28.8968],
>                                                                [-16.1719,
> 41.5298],
>                                                                [39.3750,
> -37.1377]
>                                                        ]]
>                                                }
>                    ],
>                },
>                "type": "Feature",
>                "properties": {}}
>              ]
>           };
>           var geojson_format = new OpenLayers.Format.GeoJSON();
>           var vector_layer = new OpenLayers.Layer.Vector();
>           map.addLayer(vector_layer);
>           vector_layer.addFeatures(geojson_format.read(featurecollection));
>
>        }
>
> --
> View this message in context:
> http://osgeo-org.1803224.n2.nabble.com/GeoJSON-Fill-Colors-tp6495593p6495593.html
> Sent from the OpenLayers Users mailing list archive at Nabble.com.
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>
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