def _prepared_file(mapchete_config, input_file):
"""
Returns validated, absolute paths or Mapchete process objects from input
files at zoom.
"""
if not input_file in mapchete_config.prepared_input_files:
if not input_file:
prepared = {
"file": None,
"area": None
}
else:
abs_path = os.path.join(mapchete_config.config_dir, input_file)
try:
# Sentinel-2 datasets can be in directories as well
assert os.path.isfile(abs_path) or os.path.isdir(abs_path)
except AssertionError:
raise IOError("no such file", abs_path)
extension = os.path.splitext(abs_path)[1]
if extension == ".mapchete":
mapchete_process = Mapchete(MapcheteConfig(abs_path))
prepared = {
"file": mapchete_process,
"area": reproject_geometry(
mapchete_process.config.process_area(),
mapchete_process.tile_pyramid.crs,
mapchete_config.tile_pyramid.crs
)
}
elif extension in [".SAFE", ".zip", ".ZIP"]:
prepared = {
"file": _prepare_sentinel2(SentinelDataSet(input_file)),
"area": file_bbox(abs_path, mapchete_config.tile_pyramid)
}
else:
prepared = {
"file": abs_path,
"area": file_bbox(abs_path, mapchete_config.tile_pyramid)
}
mapchete_config.prepared_input_files[input_file] = prepared
return mapchete_config.prepared_input_files[input_file]
def is_empty(self, indexes=None):
"""
Returns true if all items are masked.
"""
band_indexes = _get_band_indexes(self, indexes)
src_bbox = file_bbox(self.input_file, self.tile_pyramid)
tile_geom = self.tile.bbox(pixelbuffer=self.pixelbuffer)
# empty if tile does not intersect with file bounding box
if not tile_geom.intersects(src_bbox):
return True
# empty if source band(s) are empty
all_bands_empty = True
for band in _bands_from_cache(self, band_indexes):
if not band.mask.all():
all_bands_empty = False
break
return all_bands_empty