openlayers-2openstreetmap
I would like to show this type of relations in a simple map with Openlayers.
http://www.openstreetmap.org/api/0.6/relation/1637735/full
I'm specially interested in being able to show tags as legend. Do you know how can I do it in the simplest way possible?
I'm not sure if Openlayers has already a package to display relations.
Here's a potential answer (at least, the one I've chosen to use).
My problem comes from the fact that current geodjango API does not use linearref features from GEOS. So, I've patched my django code (using linked patch in my question) to get the 'project()' and 'interpolate()' methods.
Then, I simply loop to interpolate the needed points. The key here is to use the linearref feature of GEOS:
To Select and Highlight an feature in Openlayers
You can use the WKT format (convert your shapefiles to this format) (QGIS will do this if save the shapefile as csv) Converting Shapefiles to Text (ASCII) files?
var highlightCtrl = new OpenLayers.Control.SelectFeature(vectors, {
hover: true,
highlightOnly: true,
renderIntent: "temporary",
eventListeners: {
beforefeaturehighlighted: report,
featurehighlighted: report,
featureunhighlighted: report
}
});
var selectCtrl = new OpenLayers.Control.SelectFeature(vectors,
{clickout: true}
);
map.addControl(highlightCtrl);
map.addControl(selectCtrl);
highlightCtrl.activate();
selectCtrl.activate();
Best Answer
There are two solutions that I use for REST applications, most of the time I use both:
1)Store the tags in a array and use JavaScrip to keep track of tags related to a feature.
2)Populate the feature with some or all the tags with an iteration.
For example, load the geometries into a layer with one request, load the tags with other request, relate them with the ID. Now to have some resources working like the bubble popup, pupulate the layer with some important or desired attributes.