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Develop canonical grid files / definitions #11

@jhamman

Description

@jhamman

We should develop a set of canonical grid files and definitions. We currently have our project grids defined in terms of a CRS and extent, e.g.

def albers_conus_extent():
return "-2493045.0 177285.0 2342655.0 3310005.0"
def albers_conus_crs():
return (
'PROJCS["Albers_Conical_Equal_Area",'
'GEOGCS["WGS 84",DATUM["WGS_1984",'
'SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],'
"TOWGS84[0,0,0,-0,-0,-0,0],"
'AUTHORITY["EPSG","6326"]],'
'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
'UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],'
'AUTHORITY["EPSG","4326"]],'
'PROJECTION["Albers_Conic_Equal_Area"],'
'PARAMETER["standard_parallel_1",29.5],'
'PARAMETER["standard_parallel_2",45.5],'
'PARAMETER["latitude_of_center",23],'
'PARAMETER["longitude_of_center",-96],'
'PARAMETER["false_easting",0],'
'PARAMETER["false_northing",0],'
'UNIT["meters",1]]'
)

These should remain the reference definitions but should be accompanied by "grid files" that include the following parameters:

  • cell centroids
  • cell boundaries
  • land / ocean mask
  • cell elevation
  • cell area

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