Introduction
The EASE-grid 2.0 projection and tiling systems are the preferred systems for large regions that are bound to one of the hemisperes of confined to within 45 degrees latitiude. This post outlines how to link default regions to the EASE-grid projection and tiling systems.
EASE-grid 2.0
The setup of the specific EASE-grid 2.0 resources is inlcuded in the package setup_processes. Run the setup of EASE-grid related regions by setting the variable EASE2 to True in setup_process_main under the defined functions SetupDefaultRegions
def SetupDefaultRegions(prodDB):
...
DefaultRegions = False
MODIS = False
EASE2 = True
...
When you run the module, the EASE-grid linked scripts will be executed.
if EASE2:
'''Stand alone scripts that defines EASE grid tropical tile coordinates.
Takes a minute or two due to massive reprojection tasks'''
Ease2GlobalTileCoords(prodDB)
projFN = 'EASEgrid_karttur_setup_20211108.txt'
SetupProcessesRegions('ease2doc', projFN, prodDB)
The more complex tiling system of EASE-grid 2 tropical (denoted ease2t in the Framework) is done by a hardcoded function (Ease2GlobalTileCoords). The tiling system is saved in the database table ease2t.tilecoords. The tiling and coordinates for EASE-grid 2.0 North (ease2n) and EASE-grid 2.0 South (ease2s) are created by the Framework ordinary json structure via the commands linked in modis_karttur_setup_YYYYMMDD.txt.
The file EASEgrid_karttur_setup_YYYYMMDD.txt links to a set of json command files that setup the EASE-grid 2 processing environment in the Framework. Inspect its content by toggling the button and click on the linked json file name.
The first json command file is identical to the EASE-grid setup file under SetupCustomGrids (see the post on Projection and tiling systems for details).
Figure 1 illustrates the linking of continents to the EASE-grid 2.0 North tiling, in the EASE-grid 2.0 North and cut to the northern hemisphere (at the equator).
Next step
The next step is adding Landsat scenes and data access.