def snap_bounds(bounds=None, pyramid=None, zoom=None):
"""
Snaps bounds to tiles boundaries of specific zoom level.
Parameters
----------
bounds : bounds to be snapped
pyramid : TilePyramid
zoom : int
Returns
-------
Bounds(left, bottom, right, top)
"""
if not isinstance(bounds, (tuple, list)):
raise TypeError("bounds must be either a tuple or a list")
if len(bounds) != 4:
raise ValueError("bounds has to have exactly four values")
if not isinstance(pyramid, BufferedTilePyramid):
raise TypeError("pyramid has to be a BufferedTilePyramid")
bounds = Bounds(*bounds)
lb = pyramid.tile_from_xy(bounds.left,
bounds.bottom,
zoom,
on_edge_use="rt").bounds
rt = pyramid.tile_from_xy(bounds.right, bounds.top, zoom,
on_edge_use="lb").bounds
return Bounds(lb.left, lb.bottom, rt.right, rt.top)
def bounds_from_opts(wkt_geometry=None,
point=None,
bounds=None,
zoom=None,
raw_conf=None):
"""
Loads the process pyramid of a raw configuration.
Parameters
----------
raw_conf : dict
Raw mapchete configuration as dictionary.
Returns
-------
BufferedTilePyramid
"""
if wkt_geometry:
return Bounds(*wkt.loads(wkt_geometry).bounds)
elif point:
x, y = point
zoom_levels = get_zoom_levels(
process_zoom_levels=raw_conf["zoom_levels"], init_zoom_levels=zoom)
tp = raw_conf_process_pyramid(raw_conf)
return Bounds(*tp.tile_from_xy(x, y, max(zoom_levels)).bounds)
else:
return validate_bounds(bounds) if bounds is not None else bounds
def bounds_from_opts(wkt_geometry=None,
point=None,
point_crs=None,
zoom=None,
bounds=None,
bounds_crs=None,
raw_conf=None):
"""
Return process bounds depending on given inputs.
Parameters
----------
wkt_geometry : string
WKT geometry used to generate bounds.
point : iterable
x and y coordinates of point whose corresponding process tile bounds shall be
returned.
point_crs : str or CRS
CRS of point (default: process pyramid CRS)
zoom : int
Mandatory zoom level if point is provided.
bounds : iterable
Bounding coordinates to be used
bounds_crs : str or CRS
CRS of bounds (default: process pyramid CRS)
raw_conf : dict
Raw mapchete configuration as dictionary.
Returns
-------
BufferedTilePyramid
"""
if wkt_geometry:
return Bounds(*wkt.loads(wkt_geometry).bounds)
elif point:
x, y = point
tp = raw_conf_process_pyramid(raw_conf)
if point_crs:
reproj = reproject_geometry(Point(x, y),
src_crs=point_crs,
dst_crs=tp.crs)
x = reproj.x
y = reproj.y
zoom_levels = get_zoom_levels(
process_zoom_levels=raw_conf["zoom_levels"], init_zoom_levels=zoom)
return Bounds(*tp.tile_from_xy(x, y, max(zoom_levels)).bounds)
elif bounds:
bounds = validate_bounds(bounds)
if bounds_crs:
tp = raw_conf_process_pyramid(raw_conf)
bounds = Bounds(*reproject_geometry(
box(*bounds), src_crs=bounds_crs, dst_crs=tp.crs).bounds)
return bounds
else:
return
def clip_bounds(bounds=None, clip=None):
"""
Clips bounds by clip.
Parameters
----------
bounds : bounds to be clipped
clip : clip bounds
Returns
-------
Bounds(left, bottom, right, top)
"""
bounds = Bounds(*bounds)
clip = Bounds(*clip)
return Bounds(max(bounds.left, clip.left), max(bounds.bottom, clip.bottom),
min(bounds.right, clip.right), min(bounds.top, clip.top))
def init_bounds(self):
"""
Process bounds this process is currently initialized with.
This gets triggered by using the ``bounds`` kwarg. If not set, it will
be equal to self.bounds.
"""
if self._raw["init_bounds"] is None:
return self.bounds
else:
return Bounds(*_validate_bounds(self._raw["init_bounds"]))
def bounds_at_zoom(self, zoom=None):
"""
Return process bounds for zoom level.
Parameters
----------
zoom : integer or list
Returns
-------
process bounds : tuple
left, bottom, right, top
"""
return () if self.area_at_zoom(zoom).is_empty else Bounds(
*self.area_at_zoom(zoom).bounds)
def snap_bounds(bounds=None, pyramid=None, zoom=None):
"""
Snaps bounds to tiles boundaries of specific zoom level.
Parameters
----------
bounds : bounds to be snapped
pyramid : TilePyramid
zoom : int
Returns
-------
Bounds(left, bottom, right, top)
"""
bounds = validate_bounds(bounds)
pyramid = validate_bufferedtilepyramid(pyramid)
lb = pyramid.tile_from_xy(bounds.left,
bounds.bottom,
zoom,
on_edge_use="rt").bounds
rt = pyramid.tile_from_xy(bounds.right, bounds.top, zoom,
on_edge_use="lb").bounds
return Bounds(lb.left, lb.bottom, rt.right, rt.top)
def validate_bounds(bounds):
"""
Return validated bounds.
Bounds must be a list or tuple with exactly four elements.
Parameters
----------
bounds : list or tuple
Returns
-------
Bounds
Raises
------
TypeError if type is invalid.
"""
if not isinstance(bounds, (tuple, list)):
raise TypeError("bounds must be either a tuple or a list: %s" % str(bounds))
if len(bounds) != 4:
raise ValueError("bounds has to have exactly four values: %s" % str(bounds))
return Bounds(*bounds)
def bounds(self):
"""Process bounds as defined in the configuration."""
if self._raw["bounds"] is None:
return self.process_pyramid.bounds
else:
return Bounds(*_validate_bounds(self._raw["bounds"]))
def __init__(self,
input_config,
zoom=None,
area=None,
area_crs=None,
bounds=None,
bounds_crs=None,
single_input_file=None,
mode="continue",
debug=False,
**kwargs):
"""Initialize configuration."""
logger.debug(f"parsing {input_config}")
# get dictionary representation of input_config and
# (0) map deprecated params to new structure
self._raw = _map_to_new_config(_config_to_dict(input_config))
self._raw["init_zoom_levels"] = zoom
self._raw["init_bounds"] = bounds
self._raw["init_bounds_crs"] = bounds_crs
self._raw["init_area"] = area
self._raw["init_area_crs"] = area_crs
self._cache_area_at_zoom = {}
self._cache_full_process_area = None
if mode not in ["memory", "continue", "readonly", "overwrite"]:
raise MapcheteConfigError("unknown mode %s" % mode)
self.mode = mode
# (1) assert mandatory params are available
try:
validate_values(self._raw, _MANDATORY_PARAMETERS)
except Exception as e:
raise MapcheteConfigError(e)
# (2) check user process
self.config_dir = self._raw["config_dir"]
self.process_name = self.process_path = self._raw["process"]
if self.mode != "readonly":
logger.debug("validating process code")
self.process_func
# (3) set process and output pyramids
logger.debug("initializing pyramids")
try:
process_metatiling = self._raw["pyramid"].get("metatiling", 1)
# output metatiling defaults to process metatiling if not set
# explicitly
output_metatiling = self._raw["output"].get(
"metatiling", process_metatiling)
# we cannot properly handle output tiles which are bigger than
# process tiles
if output_metatiling > process_metatiling:
raise ValueError(
"output metatiles must be smaller than process metatiles")
# these two BufferedTilePyramid instances will help us with all
# the tile geometries etc.
self.process_pyramid = BufferedTilePyramid(
self._raw["pyramid"]["grid"],
metatiling=process_metatiling,
pixelbuffer=self._raw["pyramid"].get("pixelbuffer", 0))
self.output_pyramid = BufferedTilePyramid(
self._raw["pyramid"]["grid"],
metatiling=output_metatiling,
pixelbuffer=self._raw["output"].get("pixelbuffer", 0))
except Exception as e:
logger.exception(e)
raise MapcheteConfigError(e)
# (4) set approach how to handle inputs
# don't inititalize inputs on readonly mode or if only overviews are going to be
# built
self._init_inputs = False if (self.mode == "readonly" or (not len(
set(self.baselevels["zooms"]).intersection(
set(self.init_zoom_levels))) if self.baselevels else False)
) else True
# (5) prepare process parameters per zoom level without initializing
# input and output classes
logger.debug("preparing process parameters")
self._params_at_zoom = _raw_at_zoom(self._raw, self.init_zoom_levels)
# (6) determine process area and process boundaries both from config as well
# as from initialization.
# First, the area and bounds parameters from the configuration are checked. If
# both are provided, the intersection will be taken into account. If none are,
# the process pyramid area is assumed.
# Second, they can be overrided by the area and bounds kwargs when constructing
# the configuration.
# To finally determine the process tiles, the intersection of process area and the
# union of all inputs is considered.
self.area = self._get_process_area(
area=self._raw.get("area"),
bounds=self._raw.get("bounds"),
area_fallback=box(*self.process_pyramid.bounds),
bounds_fallback=self.process_pyramid.bounds,
area_crs=area_crs,
bounds_crs=bounds_crs)
logger.debug(f"process area: {self.area}")
self.bounds = Bounds(*self.area.bounds)
logger.debug(f"process bounds: {self.bounds}")
self.init_area = self._get_process_area(
area=self._raw.get("init_area"),
bounds=self._raw.get("init_bounds"),
area_fallback=self.area,
bounds_fallback=self.bounds,
area_crs=area_crs,
bounds_crs=bounds_crs)
logger.debug(f"init area: {self.init_area}")
self.init_bounds = Bounds(*self.init_area.bounds)
logger.debug(f"init bounds: {self.init_bounds}")
# (7) the delimiters are used by some input drivers
self._delimiters = dict(zoom=self.init_zoom_levels,
bounds=self.init_bounds,
process_bounds=self.bounds,
effective_bounds=self.effective_bounds)
# (8) initialize output
logger.debug("initializing output")
self.output
# (9) initialize input items
# depending on the inputs this action takes the longest and is done
# in the end to let all other actions fail earlier if necessary
logger.debug("initializing input")
self.input
# (10) some output drivers such as the GeoTIFF single file driver also needs the
# process area to prepare
logger.debug("prepare output")
self.output.prepare(process_area=self.area_at_zoom())
