How to calculate cell area of geographic (lat lon) grid

10-27-2022 11:33 AM
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I have a raster in geographic coordinates (lat/lon), and I need to create a corresponding grid where the values are the cell areas in square meters using the Albers equal area projection.  What's the fastest way to do this in ArcMap 10.8.1?

The way I've done it in the past is to create a fishnet polygon shape file from the raster, project the fishnet to Albers, add a field to save a copy of the Shape_Area values, project it back to geographic, then convert from polygon to raster using the saved Shape_Area values. This worked for me in the past but this time my process fails on the last step (it ran for 24 hours so I killed it). Maybe because the raster is too big? It's 3000x1000 cells, about 400MB.

Help!!! Thanks.

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