Changes between Version 53 and Version 54 of DeveloperGuidelines/GIS

Timestamp:

09/13/15 10:30:37 (9 years ago)

Author:

Fran Boon

Comment:

--

DeveloperGuidelines/GIS

@@ -30 +30 @@
 * https://github.com/flavour/eden/blob/master/modules/s3/s3gis.py#L6014
 === Variable Markers ===
-Example:
-{{{
-query = (db.gis_location.deleted == False)
-query = query & (db.gis_location.id == db["%s_%s" % (module, resource)].location_id)
-locations = db(query).select(db.gis_location.id, db.gis_location.uuid, db.gis_location.name, db.gis_location.wkt, db.gis_location.lat, db.gis_location.lon)
-for i in range(0, len(locations)):
-    locations[i].gis_location.shape = "circle"
-    locations[i].gis_location.size = locations[i][db["%s_%s" % (module, resource)].MyIntegerField]
-}}}
+There are 3 basic approaches:
+1. Use a style JSON:
+* https://github.com/flavour/eden/blob/master/modules/templates/IFRC/gis_layer_feature.csv#L6
+NB This only supports styling based on a single attribute & you need to add that to attr_fields
+
+2. Use a marker_fn:
+* https://github.com/flavour/eden/blob/master/modules/templates/NYC/config.py#L302
+* https://github.com/flavour/eden/blob/master/modules/templates/NYC/config.py#L430
+This supports whatever lookups you want in Python...you don't pass the attr_field to client but this will pass the marker_url/marker_hight/marker_width in every record which will almost certainly be bulkier
+
+3. feature_queries
+These are only supported in custom maps & always get loaded with the page...so cannot be refreshed via AJAX
 == Guidelines for Developers wishing to extend the functionality of the core GIS ==
 === !OpenLayers ===