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Replace and deprecate frequency arg for bbox methods #526

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merged 4 commits into from
Aug 15, 2023
Merged

Replace and deprecate frequency arg for bbox methods #526

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7fad85d
Deprecate frequency arg for bbox methods
mraspaud Jun 28, 2023
1f99e80
Rename bbox_shape to vertices_per_side
mraspaud Jul 7, 2023
e817700
Fix docstring
mraspaud Aug 14, 2023
bea2050
Make `boundary` arguments keywords only
mraspaud Aug 14, 2023
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86 changes: 56 additions & 30 deletions pyresample/geometry.py
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Original file line number Diff line number Diff line change
Expand Up @@ -296,13 +296,16 @@
return (SimpleBoundary(s1_lon.squeeze(), s2_lon.squeeze(), s3_lon.squeeze(), s4_lon.squeeze()),
SimpleBoundary(s1_lat.squeeze(), s2_lat.squeeze(), s3_lat.squeeze(), s4_lat.squeeze()))

def get_bbox_lonlats(self, frequency: Optional[int] = None, force_clockwise: bool = True) -> tuple:
def get_bbox_lonlats(self, vertices_per_side: Optional[int] = None, force_clockwise: bool = True,
frequency: Optional[int] = None) -> tuple:
"""Return the bounding box lons and lats.

Args:
frequency:
vertices_per_side:
The number of points to provide for each side. By default (None)
the full width and height will be provided.
frequency:
Deprecated, use vertices_per_side
force_clockwise:
Perform minimal checks and reordering of coordinates to ensure
that the returned coordinates follow a clockwise direction.
Expand All @@ -328,15 +331,19 @@
pyresample (ex. :class:`pyresample.spherical.SphPolygon`).

"""
lons, lats = self._get_bbox_elements(self.get_lonlats, frequency)
if frequency is not None:
warnings.warn("The `frequency` argument is pending deprecation, use `vertices_per_side` instead",
PendingDeprecationWarning, stacklevel=2)
vertices_per_side = vertices_per_side or frequency
lons, lats = self._get_bbox_elements(self.get_lonlats, vertices_per_side)
if force_clockwise and not self._corner_is_clockwise(
lons[0][-2], lats[0][-2], lons[0][-1], lats[0][-1], lons[1][1], lats[1][1]):
# going counter-clockwise
lons, lats = self._reverse_boundaries(lons, lats)
return lons, lats

def _get_bbox_elements(self, coord_fun, frequency: Optional[int] = None) -> tuple:
s1_slice, s2_slice, s3_slice, s4_slice = self._get_bbox_slices(frequency)
def _get_bbox_elements(self, coord_fun, vertices_per_side: Optional[int] = None) -> tuple:
s1_slice, s2_slice, s3_slice, s4_slice = self._get_bbox_slices(vertices_per_side)
s1_dim1, s1_dim2 = coord_fun(data_slice=s1_slice)
s2_dim1, s2_dim2 = coord_fun(data_slice=s2_slice)
s3_dim1, s3_dim2 = coord_fun(data_slice=s3_slice)
Expand Down Expand Up @@ -365,14 +372,14 @@
new_dim2_sides.append(dim2_side[is_valid_mask])
return new_dim1_sides, new_dim2_sides

def _get_bbox_slices(self, frequency):
def _get_bbox_slices(self, vertices_per_side):
height, width = self.shape
if frequency is None:
if vertices_per_side is None:
row_num = height
col_num = width
else:
row_num = frequency
col_num = frequency
row_num = vertices_per_side
col_num = vertices_per_side
s1_slice = (0, np.linspace(0, width - 1, col_num, dtype=int))
s2_slice = (np.linspace(0, height - 1, row_num, dtype=int), -1)
s3_slice = (-1, np.linspace(width - 1, 0, col_num, dtype=int))
Expand Down Expand Up @@ -415,25 +422,34 @@
is_clockwise = -np.pi < angle < 0
return is_clockwise

def get_edge_lonlats(self, frequency=None):
def get_edge_lonlats(self, vertices_per_side=None, frequency=None):
"""Get the concatenated boundary of the current swath."""
lons, lats = self.get_bbox_lonlats(frequency=frequency, force_clockwise=False)
if frequency is not None:
warnings.warn("The `frequency` argument is pending deprecation, use `vertices_per_side` instead",

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PendingDeprecationWarning, stacklevel=2)
vertices_per_side = vertices_per_side or frequency
lons, lats = self.get_bbox_lonlats(vertices_per_side=vertices_per_side, force_clockwise=False)
blons = np.ma.concatenate(lons)
blats = np.ma.concatenate(lats)
return blons, blats

def get_edge_bbox_in_projection_coordinates(self, frequency: Optional[int] = None):
def get_edge_bbox_in_projection_coordinates(self, vertices_per_side: Optional[int] = None,
frequency: Optional[int] = None):
"""Return the bounding box in projection coordinates."""
x, y = self._get_bbox_elements(self.get_proj_coords, frequency)
if frequency is not None:
warnings.warn("The `frequency` argument is pending deprecation, use `vertices_per_side` instead",
PendingDeprecationWarning, stacklevel=2)
vertices_per_side = vertices_per_side or frequency
x, y = self._get_bbox_elements(self.get_proj_coords, vertices_per_side)
return np.hstack(x), np.hstack(y)

def boundary(self, frequency=None, force_clockwise=False):
def boundary(self, vertices_per_side=None, force_clockwise=False, frequency=None):
"""Retrieve the AreaBoundary object.

Parameters
----------
frequency:
The number of points to provide for each side. By default (None)
vertices_per_side:
(formerly `frequency`) The number of points to provide for each side. By default (None)
the full width and height will be provided.
force_clockwise:
Perform minimal checks and reordering of coordinates to ensure
Expand All @@ -445,7 +461,11 @@
Default is False.
"""
from pyresample.boundary import AreaBoundary
lon_sides, lat_sides = self.get_bbox_lonlats(frequency=frequency,
if frequency is not None:
warnings.warn("The `frequency` argument is pending deprecation, use `vertices_per_side` instead",

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PendingDeprecationWarning, stacklevel=2)
vertices_per_side = vertices_per_side or frequency
lon_sides, lat_sides = self.get_bbox_lonlats(vertices_per_side=vertices_per_side,
force_clockwise=force_clockwise)
return AreaBoundary.from_lonlat_sides(lon_sides, lat_sides)

Expand Down Expand Up @@ -1565,20 +1585,20 @@
return False
return 'geostationary' in coord_operation.method_name.lower()

def _get_geo_boundary_sides(self, frequency=None):
def _get_geo_boundary_sides(self, vertices_per_side=None):
"""Retrieve the boundary sides list for geostationary projections."""
# Define default frequency
if frequency is None:
frequency = 50
if vertices_per_side is None:
vertices_per_side = 50
# Ensure at least 4 points are used
if frequency < 4:
frequency = 4
if vertices_per_side < 4:
vertices_per_side = 4
# Ensure an even number of vertices for side creation
if (frequency % 2) != 0:
frequency = frequency + 1
lons, lats = get_geostationary_bounding_box_in_lonlats(self, nb_points=frequency)
if (vertices_per_side % 2) != 0:
vertices_per_side = vertices_per_side + 1
lons, lats = get_geostationary_bounding_box_in_lonlats(self, nb_points=vertices_per_side)
# Retrieve dummy sides for GEO (side1 and side3 always of length 2)
side02_step = int(frequency / 2) - 1
side02_step = int(vertices_per_side / 2) - 1
lon_sides = [lons[slice(0, side02_step + 1)],
lons[slice(side02_step, side02_step + 1 + 1)],
lons[slice(side02_step + 1, side02_step * 2 + 1 + 1)],
Expand All @@ -1591,15 +1611,17 @@
]
return lon_sides, lat_sides

def boundary(self, frequency=None, force_clockwise=False):
def boundary(self, *, vertices_per_side=None, force_clockwise=False, frequency=None):
"""Retrieve the AreaBoundary object.

Parameters
----------
frequency:
vertices_per_side:
The number of points to provide for each side. By default (None)
the full width and height will be provided, except for geostationary
projection where by default only 50 points are selected.
frequency:
Deprecated, use vertices_per_side
force_clockwise:
Perform minimal checks and reordering of coordinates to ensure
that the returned coordinates follow a clockwise direction.
Expand All @@ -1610,10 +1632,14 @@
Default is False.
"""
from pyresample.boundary import AreaBoundary
if frequency is not None:
warnings.warn("The `frequency` argument is pending deprecation, use `vertices_per_side` instead",
PendingDeprecationWarning, stacklevel=2)
vertices_per_side = vertices_per_side or frequency
if self.is_geostationary:
lon_sides, lat_sides = self._get_geo_boundary_sides(frequency=frequency)
lon_sides, lat_sides = self._get_geo_boundary_sides(vertices_per_side=vertices_per_side)
else:
lon_sides, lat_sides = self.get_bbox_lonlats(frequency=frequency,
lon_sides, lat_sides = self.get_bbox_lonlats(vertices_per_side=vertices_per_side,
force_clockwise=force_clockwise)
boundary = AreaBoundary.from_lonlat_sides(lon_sides, lat_sides)
return boundary
Expand Down
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