In ArcGIS, we have been using the geodesic area calculations to calculate polygon areas in square kilometers from a geographic coordinate system such as WGS84. See http://dmahr.com/2015/07/geodesic-areas-arcmap-field-calculator/. I don't seem to find a similar reprojection in FME. is there an one that is closet?
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What is the reprojection in FME that is closest to the Geodesic Area calculations used in ArcGIS?
Best answer by redgeographics
You have two options:
- Reproject to an Equal Area coordinate system that's relevant for your area-of-interest and then the regular AreaCalculator
- Use the GeographicAreaCalculator custom transformer, it will reproject to a generic Equal Area system centered on your feature and then calculate the area. Because of that there might be small variations between this option and the first one.
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