def create_tiles(rasterlayer_id, zoom, extract_metadata=False):
"""
Create all tiles for a raster layer at the input zoom level.
"""
try:
parser = RasterLayerParser(rasterlayer_id)
# Open raster file and extract metadata if requested.
if extract_metadata:
parser.open_raster_file()
parser.extract_metadata()
# Check if zoom level should be built.
if zoom is None:
zoom = parser.max_zoom
elif isinstance(zoom, (int, float)):
if zoom > parser.max_zoom:
return
else:
zoom = [zl for zl in zoom if zl <= parser.max_zoom]
if not len(zoom):
return
# Open raster file if not open already.
if not extract_metadata:
parser.open_raster_file()
parser.reproject_rasterfile()
parser.create_tiles(zoom)
except:
parser.log(traceback.format_exc(),
status=parser.rasterlayer.parsestatus.FAILED)
raise
finally:
if hasattr(parser, 'tmpdir'):
shutil.rmtree(parser.tmpdir)
def parse(rasterlayer):
"""
Parse raster layer to extract metadata and create tiles.
"""
parser = RasterLayerParser(rasterlayer)
parser.log('Started parsing raster.')
# Create array of all allowed zoom levels
if rasterlayer.build_pyramid:
zoom_range = range(GLOBAL_MAX_ZOOM_LEVEL + 1)
else:
if rasterlayer.max_zoom is not None:
zoom_range = (rasterlayer.max_zoom, )
else:
zoom_range = None
# Check if parsing should happen asynchronously
async = getattr(settings, 'RASTER_USE_CELERY', False)
if async:
if zoom_range is not None:
create_tiles_chain = create_tiles.si(rasterlayer, zoom_range[:5],
True)
# Bundle the first five raster layers to one task. For low zoom
# levels, downloading is more costly than parsing.
create_tiles_chain = create_tiles.si(rasterlayer, zoom_range[:5],
True)
if len(zoom_range) > 5:
# Create a group of tasks with the middle zoom levels that are
# prioritized over high zoom levels.
middle_level_group = group(
create_tiles.si(rasterlayer, zoom)
for zoom in zoom_range[5:10])
# Combine bundle and middle levels to priority group.
create_tiles_chain = group(create_tiles_chain,
middle_level_group)
if len(zoom_range) > 10:
# Create a task group for high zoom levels.
high_level_group = group(
create_tiles.si(rasterlayer, zoom)
for zoom in zoom_range[10:])
create_tiles_chain = (create_tiles_chain | high_level_group)
else:
create_tiles_chain = create_tiles.si(rasterlayer, None, True)
# Setup the parser logic as parsing chain
parsing_task_chain = (clear_tiles.si(rasterlayer) | create_tiles_chain
| send_success_signal.si(rasterlayer))
# Apply the parsing chain
parser.log('Parse task queued, waiting for worker availability.')
parsing_task_chain.apply_async()
else:
clear_tiles(rasterlayer)
create_tiles(rasterlayer, zoom_range, True)
send_success_signal(rasterlayer)
def parse(rasterlayer):
"""
Parse raster layer to extract metadata and create tiles.
"""
parser = RasterLayerParser(rasterlayer)
parser.log('Started parsing raster.')
# Create array of all allowed zoom levels
if rasterlayer.build_pyramid:
zoom_range = range(GLOBAL_MAX_ZOOM_LEVEL + 1)
else:
if rasterlayer.max_zoom is not None:
zoom_range = (rasterlayer.max_zoom, )
else:
zoom_range = None
# Check if parsing should happen asynchronously
async = getattr(settings, 'RASTER_USE_CELERY', False)
if async:
if zoom_range is not None:
create_tiles_chain = create_tiles.si(rasterlayer, zoom_range[:5], True)
# Bundle the first five raster layers to one task. For low zoom
# levels, downloading is more costly than parsing.
create_tiles_chain = create_tiles.si(rasterlayer, zoom_range[:5], True)
if len(zoom_range) > 5:
# Create a group of tasks with the middle zoom levels that are
# prioritized over high zoom levels.
middle_level_group = group(
create_tiles.si(rasterlayer, zoom) for zoom in zoom_range[5:10]
)
# Combine bundle and middle levels to priority group.
create_tiles_chain = group(create_tiles_chain, middle_level_group)
if len(zoom_range) > 10:
# Create a task group for high zoom levels.
high_level_group = group(create_tiles.si(rasterlayer, zoom) for zoom in zoom_range[10:])
create_tiles_chain = (create_tiles_chain | high_level_group)
else:
create_tiles_chain = create_tiles.si(rasterlayer, None, True)
# Setup the parser logic as parsing chain
parsing_task_chain = (
clear_tiles.si(rasterlayer) |
create_tiles_chain |
send_success_signal.si(rasterlayer)
)
# Apply the parsing chain
parser.log('Parse task queued, waiting for worker availability.')
parsing_task_chain.apply_async()
else:
clear_tiles(rasterlayer)
create_tiles(rasterlayer, zoom_range, True)
send_success_signal(rasterlayer)
def create_tiles(rasterlayer, zoom, extract_metadata=False):
"""
Create all tiles for a raster layer at the input zoom level.
"""
try:
parser = RasterLayerParser(rasterlayer)
# Open raster file and extract metadata if requested.
if extract_metadata:
parser.open_raster_file()
parser.extract_metadata()
# Check if zoom level should be built.
if zoom is None:
zoom = parser.max_zoom
elif isinstance(zoom, (int, float)):
if zoom > parser.max_zoom:
return
else:
zoom = [zl for zl in zoom if zl <= parser.max_zoom]
if not len(zoom):
return
# Open raster file if not open already.
if not extract_metadata:
parser.open_raster_file()
parser.reproject_rasterfile()
parser.create_tiles(zoom)
except:
parser.log(
traceback.format_exc(),
status=parser.rasterlayer.parsestatus.FAILED
)
raise
finally:
if hasattr(parser, 'tmpdir'):
shutil.rmtree(parser.tmpdir)
def parse(rasterlayer_id):
"""
Parse raster layer to extract metadata and create tiles.
"""
parser = RasterLayerParser(rasterlayer_id)
parser.log('Started parsing raster.')
# Create array of all allowed zoom levels
if parser.rasterlayer.build_pyramid:
zoom_range = range(GLOBAL_MAX_ZOOM_LEVEL + 1)
else:
if parser.rasterlayer.max_zoom is not None:
zoom_range = (parser.rasterlayer.max_zoom, )
else:
zoom_range = None
# Check if parsing should happen asynchronously
parse_async = getattr(settings, 'RASTER_USE_CELERY', False)
parse_single_task = getattr(settings, 'RASTER_PARSE_SINGLE_TASK', False)
if parse_async and not parse_single_task:
if zoom_range is not None:
# Bundle the first five raster layers to one task. For low zoom
# levels, downloading is more costly than parsing.
create_tiles_chain = create_tiles.si(
rasterlayer_id, zoom_range[:MIN_ZOOMLEVEL_TASK_PARALLEL], True)
# Run the higher level zooms in parallel tasks through a task group.
if len(zoom_range) > MIN_ZOOMLEVEL_TASK_PARALLEL:
high_zoom_level_group = group(
create_tiles.si(rasterlayer_id, zoom)
for zoom in zoom_range[MIN_ZOOMLEVEL_TASK_PARALLEL:])
# Combine bundle and middle levels to priority group.
create_tiles_chain = (create_tiles_chain
| high_zoom_level_group)
else:
create_tiles_chain = create_tiles.si(rasterlayer_id, None, True)
# Setup the parser logic as parsing chain
parsing_task_chain = (clear_tiles.si(rasterlayer_id)
| create_tiles_chain
| send_success_signal.si(rasterlayer_id))
# Apply the parsing chain
parser.log('Parse task queued, waiting for worker availability.')
parsing_task_chain.apply_async()
elif parse_async and parse_single_task:
parser.log(
'Parse task queued in all-in-one mode, waiting for worker availability.'
)
all_in_one.delay(rasterlayer_id, zoom_range)
else:
clear_tiles(rasterlayer_id)
create_tiles(rasterlayer_id, zoom_range, True)
send_success_signal(rasterlayer_id)
def parse(rasterlayer_id):
"""
Parse raster layer to extract metadata and create tiles.
"""
parser = RasterLayerParser(rasterlayer_id)
parser.log('Started parsing raster.')
# Create array of all allowed zoom levels
if parser.rasterlayer.build_pyramid:
zoom_range = list(range(GLOBAL_MAX_ZOOM_LEVEL + 1))
else:
if parser.rasterlayer.max_zoom is not None:
zoom_range = (parser.rasterlayer.max_zoom, )
else:
zoom_range = None
# Check if parsing should happen asynchronously
parse_async = getattr(settings, 'RASTER_USE_CELERY', False)
parse_single_task = getattr(settings, 'RASTER_PARSE_SINGLE_TASK', False)
if parse_async and not parse_single_task:
if zoom_range is not None:
# Bundle the first five raster layers to one task. For low zoom
# levels, downloading is more costly than parsing.
create_tiles_chain = create_tiles.si(rasterlayer_id, zoom_range[:MIN_ZOOMLEVEL_TASK_PARALLEL], True)
# Run the higher level zooms in parallel tasks through a task group.
if len(zoom_range) > MIN_ZOOMLEVEL_TASK_PARALLEL:
high_zoom_level_group = group(
create_tiles.si(rasterlayer_id, zoom) for zoom in zoom_range[MIN_ZOOMLEVEL_TASK_PARALLEL:]
)
# Combine bundle and middle levels to priority group.
create_tiles_chain = (create_tiles_chain | high_zoom_level_group)
else:
create_tiles_chain = create_tiles.si(rasterlayer_id, None, True)
# Setup the parser logic as parsing chain
parsing_task_chain = (
clear_tiles.si(rasterlayer_id)
| create_tiles_chain
| send_success_signal.si(rasterlayer_id)
)
# Apply the parsing chain
parser.log('Parse task queued, waiting for worker availability.')
parsing_task_chain.apply_async()
elif parse_async and parse_single_task:
parser.log('Parse task queued in all-in-one mode, waiting for worker availability.')
all_in_one.delay(rasterlayer_id, zoom_range)
else:
all_in_one(rasterlayer_id, zoom_range)