def get_map(self, query):
if self.res_range and not self.res_range.contains(query.bbox, query.size,
query.srs):
raise BlankImage()
if self.coverage and not self.coverage.intersects(query.bbox, query.srs):
raise BlankImage()
try:
resp = self.render(query)
except RuntimeError, ex:
log.error('could not render Mapnik map: %s', ex)
reraise_exception(SourceError(ex.args[0]), sys.exc_info())
def _get_sub_query(self, query, format):
size, offset, bbox = bbox_position_in_image(query.bbox, query.size, self.extent.bbox_for(query.srs))
if size[0] == 0 or size[1] == 0:
raise BlankImage()
src_query = MapQuery(bbox, size, query.srs, format)
resp = self.client.retrieve(src_query, format)
return SubImageSource(resp, size=query.size, offset=offset, image_opts=self.image_opts)
def get_map(self, query):
if self.res_range and not self.res_range.contains(query.bbox, query.size,
query.srs):
raise BlankImage()
if self.coverage and not self.coverage.intersects(query.bbox, query.srs):
raise BlankImage()
try:
resp = self._get_map(query)
if self.transparent_color:
resp = make_transparent(resp, self.transparent_color,
self.transparent_color_tolerance)
resp.opacity = self.opacity
return resp
except HTTPClientError, e:
log.warn('could not retrieve WMS map: %s', e)
reraise_exception(SourceError(e.args[0]), sys.exc_info())
def get_map(self, query):
if self.grid.tile_size != query.size:
ex = InvalidSourceQuery(
'tile size of cache and tile source do not match: %s != %s' %
(self.grid.tile_size, query.size))
log_config.error(ex)
raise ex
if self.grid.srs != query.srs:
ex = InvalidSourceQuery(
'SRS of cache and tile source do not match: %r != %r' %
(self.grid.srs, query.srs))
log_config.error(ex)
raise ex
if self.res_range and not self.res_range.contains(
query.bbox, query.size, query.srs):
raise BlankImage()
if self.coverage and not self.coverage.intersects(
query.bbox, query.srs):
raise BlankImage()
_bbox, grid, tiles = self.grid.get_affected_tiles(
query.bbox, query.size)
if grid != (1, 1):
raise InvalidSourceQuery('BBOX does not align to tile')
tile_coord = next(tiles)
try:
return self.client.get_tile(tile_coord, format=query.format)
except HTTPClientError as e:
if self.error_handler:
resp = self.error_handler.handle(e.response_code, query)
if resp:
return resp
log.warn('could not retrieve tile: %s', e)
reraise_exception(SourceError(e.args[0]), sys.exc_info())
def get_map(self, query):
raise BlankImage()
def contains(self, bbox, srs):
if srs != SRS(3857):
if not is_valid_transformation(bbox, srs, SRS(3857)):
raise BlankImage()
return True