def layer_tiles(request):
"""Ajax request to get layer's url to show in the map.
"""
if request.method != 'GET':
return HttpResponseBadRequest()
layer_id = request.GET.get('layer_id')
if request.GET.get('target_srid'):
target_srid = request.GET.get('target_srid')
else:
target_srid = 'EPSG:4326'
if not layer_id:
return HttpResponseBadRequest()
try:
layer = Layer.objects.get(id=layer_id)
# Use QGIS Server bbox conventions
bbox_x0, bbox_y0, bbox_x1, bbox_y1 = transform_layer_bbox(
layer, target_srid)
context = {
'layer_tiles_url': layer.get_tiles_url(),
'layer_bbox_x0': float(bbox_x0),
'layer_bbox_x1': float(bbox_x1),
'layer_bbox_y0': float(bbox_y0),
'layer_bbox_y1': float(bbox_y1),
'layer_name': layer.title,
'legend_url': layer.get_legend_url()
}
return HttpResponse(json.dumps(context),
content_type="application/json")
except Exception as e:
LOGGER.exception(e)
return HttpResponseServerError()
def test_transform_layer_bbox(self):
"""Test bbox CRS conversion"""
filename = os.path.join(gisdata.GOOD_DATA, 'raster/test_grid.tif')
uploaded = file_upload(filename)
new_bbox = transform_layer_bbox(uploaded, 3857)
expected_bbox = [
10793092.549352637, -615294.6893182276,
10810202.947307253, -591232.8900397373]
self.assertEqual(new_bbox, expected_bbox)
new_bbox = transform_layer_bbox(uploaded, 4326)
expected_bbox = [96.956, -5.518733, 97.10970532, -5.303545552]
self.assertEqual(new_bbox, expected_bbox)
uploaded.delete()