def get_query(layer, z, x, y, ext):
layer = env.layers[layer]
coord = Coordinate(y, x, z)
bounds = u.bounds(layer.projection, coord)
mimetype, format = u.get_type_by_ext(ext)
return env.provider.get_query(layer, coord, bounds, format)
def get_tile(layer, z, x, y, ext, ignore_cached = False):
if layer not in env.layers and layer != 'all': raise ValueError('Layer not found: ' + layer)
provider = env.provider
cache = env.cache
layers = env.layers.values() if layer == 'all' else [env.layers[layer]]
coord = Coordinate(y, x, z)
mimetype, format = u.get_type_by_ext(ext)
render_tile = partial(provider.render_tile, layers, coord, format)
if cache:
cache.lock(layer, coord, format)
try:
body = cache.read(layer, coord, format) if not ignore_cached else None
if body is None:
body = render_tile()
cache.save(body, layer, coord, format)
finally:
cache.unlock(layer, coord, format)
else:
body = render_tile()
return mimetype, body
