>On Sun, Mar 30, 2008 at 06:11:05PM +0100, Bjorn Sandvik wrote:
>>/ Hi,
/>>/
/>>/ I'm looking at possibilities of using OpenLayers for thematic mapping
/>>/ (thematicmapping.org), and I think GeoJSON might be a suitable format
/>>/ for choropleth maps.
/>>/
/>>/ I'm able to generate GeoJSON on the server using PHP, and my country
/>>/ polygons are rendered in OpenLayers when I'm pasting the GeoJSON code
/>>/ on: http://www.openlayers.org/dev/examples/vector-formats.html
/>>/
/>>/ My question: What is the best way to load and render a GeoJSON layer in
/>>/ OpenLayers?
/>
> new OpenLayers.Layer.GML("My GeoJSON Layer", "/file.geojson",
> {format: OpenLayers.Format.GeoJSON});
>
> Regards,
> --
> Christopher Schmidt
> MetaCarta
Thanks, it works. Is it also possible to load a GeoJSON file using the read
function?
map = new OpenLayers.Map('map');
var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://labs.metacarta.com/wms/vmap0?";, {layers: 'basic'});
vectors = new OpenLayers.Layer.Vector("Vector Layer");
map.addLayers([wms, vectors]);
var parser = new OpenLayers.Format.GeoJSON();
var features = parser.read("filename");
...
See last line.
I guess I can more easily manipulate the features this way.
Bjorn
http://blog.thematicmapping.org
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