def populate_tile_level(self, zoom):
"""
Create tiles for this raster at the given zoomlevel.
This routine first snaps the raster to the grid of the zoomlevel,
then creates the tiles from the snapped raster.
"""
# Abort if zoom level is above resolution of the raster layer
if zoom > self.max_zoom:
return
elif zoom == self.max_zoom:
self.create_initial_histogram_buckets()
# Compute the tile x-y-z index range for the rasterlayer for this zoomlevel
bbox = self.dataset.extent
quadrants = utils.quadrants(bbox, zoom)
self.log('Creating {0} tiles in {1} quadrants at zoom {2}.'.format(
self.nr_of_tiles(zoom), len(quadrants), zoom))
# Process quadrants in parallell
for indexrange in quadrants:
self.process_quadrant(indexrange, zoom)
# Store histogram data
if zoom == self.max_zoom:
bandmetas = RasterLayerBandMetadata.objects.filter(
rasterlayer=self.rasterlayer)
for bandmeta in bandmetas:
bandmeta.hist_values = self.hist_values[bandmeta.band].tolist()
bandmeta.save()
self.log('Finished parsing at zoom level {0}.'.format(zoom), zoom=zoom)
def populate_tile_level(self, zoom):
"""
Create tiles for this raster at the given zoomlevel.
This routine first snaps the raster to the grid of the zoomlevel,
then creates the tiles from the snapped raster.
"""
# Abort if zoom level is above resolution of the raster layer
if zoom > self.max_zoom:
return
elif zoom == self.max_zoom:
self.create_initial_histogram_buckets()
# Compute the tile x-y-z index range for the rasterlayer for this zoomlevel
bbox = self.dataset.extent
quadrants = utils.quadrants(bbox, zoom)
self.log('Creating {0} tiles in {1} quadrants at zoom {2}.'.format(self.nr_of_tiles(zoom), len(quadrants), zoom))
# Process quadrants in parallell
quadrant_task_group = group(self.process_quadrant.si(indexrange, zoom) for indexrange in quadrants)
quadrant_task_group.apply()
# Store histogram data
if zoom == self.max_zoom:
bandmetas = RasterLayerBandMetadata.objects.filter(rasterlayer=self.rasterlayer)
for bandmeta in bandmetas:
bandmeta.hist_values = self.hist_values[bandmeta.band].tolist()
bandmeta.save()
self.log('Finished parsing at zoom level {0}.'.format(zoom), zoom=zoom)