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Project Description

The Equal-Area Scalable Earth (EASE) Grid is a system of projections that is used by NASA and others for distribution of remote sensing data.

You can find some overview information at the NSIDC website. Unfortunately from the documentation it was not clear to me how the latitude, longitude values of certain EASE grid resolutions were calculated. So I wrote this package to find out.

Supported EASE Grids

There are two versions of EASE grid systems. This package focuses on EASE-Grid 2.0 at the moment. The data we were reading is disseminated on the global EASE-Grid projection which is why this is the one that is currently supported.

Calculation of any global EASE2 grid should work. Compability with the tiling scheme of NASA is tested for the global 36km grid (EASE2_M36KM) and the global 25km grid (EASE2_M25KM). The tiling of the 25km grid is only the same as the NASA tiling if the map_scale parameter is given explicitely. This will also be the case for the subgrids of the 36km grid like EASE2_M09KM and EASE2_M03KM. The map_scale parameters used by NASA are available from the file ease2_grid_info.pro inside the easeconv*.tgz file at ftp://sidads.colorado.edu/pub/tools/easegrid/geolocation_tools/

How to use

To get the coordinates of a EASE2 grid:

from ease_grid import EASE2_grid
egrid = EASE2_grid(36000)
assert egrid.shape == (406, 964)
# these two attributes contain the longitude and latitude coordinate dimension
egrid.londim
egrid.latdim

Note

This project has been set up using PyScaffold 2.5.6. For details and usage information on PyScaffold see http://pyscaffold.readthedocs.org/.

Release History

Release History

0.1

This version

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

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