Add capability to expand corners of SCRIP grid

ci/recipe/meta.yaml

@@ -1,5 +1,5 @@
 {% set name = "pyremap" %}
-{% set version = "1.1.0" %}
+{% set version = "1.2.0" %}
 
 package:
   name: {{ name|lower }}

docs/versions.rst

@@ -19,6 +19,7 @@ Documentation    On GitHub
 `v1.0.0`_         `1.0.0`_
 `v1.0.1`_         `1.0.1`_
 `v1.1.0`_         `1.1.0`_
+`v1.2.0`_         `1.2.0`_
 ================ ===============
 
 .. _`stable`: ../stable/index.html
@@ -36,6 +37,7 @@ Documentation    On GitHub
 .. _`v1.0.0`: ../1.0.0/index.html
 .. _`v1.0.1`: ../1.0.1/index.html
 .. _`v1.1.0`: ../1.1.0/index.html
+.. _`v1.2.0`: ../1.2.0/index.html
 .. _`main`: https://github.com/MPAS-Dev/pyremap/tree/main
 .. _`0.0.6`: https://github.com/MPAS-Dev/pyremap/tree/0.0.6
 .. _`0.0.7`: https://github.com/MPAS-Dev/pyremap/tree/0.0.7
@@ -51,3 +53,4 @@ Documentation    On GitHub
 .. _`1.0.0`: https://github.com/MPAS-Dev/pyremap/tree/1.0.0
 .. _`1.0.1`: https://github.com/MPAS-Dev/pyremap/tree/1.0.1
 .. _`1.1.0`: https://github.com/MPAS-Dev/pyremap/tree/1.1.0
+.. _`1.2.0`: https://github.com/MPAS-Dev/pyremap/tree/1.2.0

pyremap/__init__.py

@@ -12,5 +12,5 @@
 from pyremap.polar import get_polar_descriptor, get_polar_descriptor_from_file
 from pyremap.remapper import Remapper
 
-__version_info__ = (1, 1, 0)
+__version_info__ = (1, 2, 0)
 __version__ = '.'.join(str(vi) for vi in __version_info__)

pyremap/descriptor/lat_lon_2d_grid_descriptor.py

@@ -17,6 +17,7 @@
 from pyremap.descriptor.utility import (
     add_history,
     create_scrip,
+    expand_scrip,
     interp_extrap_corners_2d,
     round_res,
     unwrap_corners,
@@ -122,14 +123,21 @@ def read(cls, fileName=None, ds=None, latVarName='lat',
         descriptor.history = add_history(ds=ds)
         return descriptor
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Create a SCRIP file based on the grid.
 
         Parameters
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
         outFile = netCDF4.Dataset(scripFileName, 'w', format=self.format)
 
@@ -150,6 +158,9 @@ def to_scrip(self, scripFileName):
         outFile.variables['grid_corner_lon'][:] = \
             unwrap_corners(self.lonCorner)
 
+        if expandDist is not None or expandFactor is not None:
+            expand_scrip(outFile, expandDist, expandFactor)
+
         setattr(outFile, 'history', self.history)
 
         outFile.close()

pyremap/descriptor/lat_lon_grid_descriptor.py

@@ -17,6 +17,7 @@
 from pyremap.descriptor.utility import (
     add_history,
     create_scrip,
+    expand_scrip,
     interp_extrap_corner,
     round_res,
     unwrap_corners,
@@ -198,14 +199,21 @@ def create(cls, latCorner, lonCorner, units='degrees', meshName=None,
         descriptor._set_coords('lat', 'lon', 'lat', 'lon')
         return descriptor
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Given a lat-lon grid file, create a SCRIP file based on the grid.
 
         Parameters
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
         outFile = netCDF4.Dataset(scripFileName, 'w', format=self.format)
 
@@ -228,6 +236,9 @@ def to_scrip(self, scripFileName):
         outFile.variables['grid_corner_lat'][:] = unwrap_corners(LatCorner)
         outFile.variables['grid_corner_lon'][:] = unwrap_corners(LonCorner)
 
+        if expandDist is not None or expandFactor is not None:
+            expand_scrip(outFile, expandDist, expandFactor)
+
         setattr(outFile, 'history', self.history)
 
         outFile.close()

pyremap/descriptor/mesh_descriptor.py

@@ -61,7 +61,7 @@ def __init__(self, meshName=None, regional=None):
         self.format = 'NETCDF4'
         self.engine = None
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Subclasses should overload this method to write a SCRIP file based on
         the mesh.
@@ -70,6 +70,13 @@ def to_scrip(self, scripFileName):
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
         raise NotImplementedError(
             'to_scrip is not implemented for this descriptor')

pyremap/descriptor/mpas_cell_mesh_descriptor.py

@@ -16,7 +16,7 @@
 import xarray
 
 from pyremap.descriptor.mesh_descriptor import MeshDescriptor
-from pyremap.descriptor.utility import add_history, create_scrip
+from pyremap.descriptor.utility import add_history, create_scrip, expand_scrip
 
 
 class MpasCellMeshDescriptor(MeshDescriptor):
@@ -98,14 +98,21 @@ def __init__(self, fileName, meshName=None, vertices=False):
 
             self.history = add_history(ds=ds)
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Given an MPAS mesh file, create a SCRIP file based on the mesh.
 
         Parameters
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
         if self.vertices:
             raise ValueError('A SCRIP file won\'t work for remapping vertices')
@@ -152,6 +159,9 @@ def to_scrip(self, scripFileName):
         outFile.variables['grid_corner_lat'][:] = grid_corner_lat[:]
         outFile.variables['grid_corner_lon'][:] = grid_corner_lon[:]
 
+        if expandDist is not None or expandFactor is not None:
+            expand_scrip(outFile, expandDist, expandFactor)
+
         setattr(outFile, 'history', self.history)
 
         inFile.close()

pyremap/descriptor/mpas_edge_mesh_descriptor.py

@@ -14,7 +14,7 @@
 import xarray as xr
 
 from pyremap.descriptor.mesh_descriptor import MeshDescriptor
-from pyremap.descriptor.utility import add_history, create_scrip
+from pyremap.descriptor.utility import add_history, create_scrip, expand_scrip
 
 
 class MpasEdgeMeshDescriptor(MeshDescriptor):
@@ -70,14 +70,21 @@ def __init__(self, fileName, meshName=None):
 
             self.history = add_history(ds=ds)
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Given an MPAS mesh file, create a SCRIP file based on the mesh.
 
         Parameters
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
 
         inFile = netCDF4.Dataset(self.fileName, 'r')
@@ -146,6 +153,9 @@ def to_scrip(self, scripFileName):
         outFile.variables['grid_corner_lat'][:] = grid_corner_lat[:]
         outFile.variables['grid_corner_lon'][:] = grid_corner_lon[:]
 
+        if expandDist is not None or expandFactor is not None:
+            expand_scrip(outFile, expandDist, expandFactor)
+
         setattr(outFile, 'history', self.history)
 
         inFile.close()

pyremap/descriptor/mpas_vertex_mesh_descriptor.py

@@ -14,7 +14,7 @@
 import xarray as xr
 
 from pyremap.descriptor.mesh_descriptor import MeshDescriptor
-from pyremap.descriptor.utility import add_history, create_scrip
+from pyremap.descriptor.utility import add_history, create_scrip, expand_scrip
 
 
 class MpasVertexMeshDescriptor(MeshDescriptor):
@@ -70,14 +70,21 @@ def __init__(self, fileName, meshName=None):
 
             self.history = add_history(ds=ds)
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Given an MPAS mesh file, create a SCRIP file based on the mesh.
 
         Parameters
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
 
         inFile = netCDF4.Dataset(self.fileName, 'r')
@@ -150,6 +157,9 @@ def to_scrip(self, scripFileName):
         outFile.variables['grid_corner_lat'][:] = grid_corner_lat[:]
         outFile.variables['grid_corner_lon'][:] = grid_corner_lon[:]
 
+        if expandDist is not None or expandFactor is not None:
+            expand_scrip(outFile, expandDist, expandFactor)
+
         setattr(outFile, 'history', self.history)
 
         inFile.close()

pyremap/descriptor/point_collection_descriptor.py

@@ -77,14 +77,21 @@ def __init__(self, lats, lons, collectionName, units='degrees',
         self.dimSize = [len(self.lat)]
         self.history = add_history()
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Given an MPAS mesh file, create a SCRIP file based on the mesh.
 
         Parameters
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
 
         outFile = netCDF4.Dataset(scripFileName, 'w', format=self.format)

pyremap/descriptor/projection_grid_descriptor.py

@@ -18,6 +18,7 @@
 from pyremap.descriptor.utility import (
     add_history,
     create_scrip,
+    expand_scrip,
     interp_extrap_corner,
     unwrap_corners,
 )
@@ -173,14 +174,21 @@ def create(cls, projection, x, y, meshName):
         descriptor.history = add_history()
         return descriptor
 
-    def to_scrip(self, scripFileName):
+    def to_scrip(self, scripFileName, expandDist=None, expandFactor=None):
         """
         Create a SCRIP file based on the grid and projection.
 
         Parameters
         ----------
         scripFileName : str
             The path to which the SCRIP file should be written
+
+        expandDist : float, optional
+            A distance in meters to expand each grid cell outward from the
+            center
+
+        expandFactor : float, optional
+            A factor by which to expand each grid cell outward from the center
         """
         outFile = netCDF4.Dataset(scripFileName, 'w', format=self.format)
 
@@ -206,6 +214,9 @@ def to_scrip(self, scripFileName):
         outFile.variables['grid_corner_lat'][:] = unwrap_corners(LatCorner)
         outFile.variables['grid_corner_lon'][:] = unwrap_corners(LonCorner)
 
+        if expandDist is not None or expandFactor is not None:
+            expand_scrip(outFile, expandDist, expandFactor)
+
         setattr(outFile, 'history', self.history)
 
         outFile.close()