def unionFeature(request):
try:
post_dict = dict(request.POST.copy().iteritems())
layer_id = int(post_dict['layer_id'])
featureCollection = json.loads(post_dict['feature'])
layer = Shapefile.objects.get(pk=layer_id, created_by=request.user)
output = ogr.Geometry(geometryNameToOgrType(layer.geom_type))
for feature in featureCollection['features']:
geometry = ogr.CreateGeometryFromJson(json.dumps(feature['geometry']))
feature['geometry'] = None
output = output.Union(geometry)
output = forceOgrMulti(output, layer.geom_type)
featureCollection['features'][0]['geometry'] = json.loads(output.ExportToJson())
response = json.dumps(featureCollection)
return HttpResponse(response,content_type="application/json")
except:
traceback.print_exc()
return HttpResponse("")
def eraseFeature(request):
try:
post_dict = dict(request.POST.copy().iteritems())
featureCollection = json.loads(post_dict['feature'])
mask = json.loads(post_dict['mask'])
ogrMask = ogr.CreateGeometryFromJson(json.dumps(mask))
layer_id = int(post_dict['layer_id'])
layer = Shapefile.objects.get(pk=layer_id, created_by=request.user)
for feature in featureCollection['features']:
geometry = ogr.CreateGeometryFromJson(json.dumps(feature['geometry']))
output = geometry.Difference(ogrMask)
output = forceOgrMulti(output, layer.geom_type)
feature['geometry'] = json.loads(output.ExportToJson())
response = json.dumps(featureCollection)
return HttpResponse(response,content_type="application/json")
except:
traceback.print_exc()
return HttpResponse("")