Calculating LULC change 1973-2014 of a classified map (raster converted to shapefile) in ArcGIS 10.6

Question

I am attempting to workout landcover change between two classified landcover maps. Ideally I want to show percentage change between the years per landcover type. I think I have done this but I am unsure whether my calculations are correct as the percentages seem to be very high...

Also, my main interest in the study is seeing how palm oil (large concessions and smallholders), has caused habitat loss (in this case loss of forest) from 1973 - 2014. Is there an elegant way of showing this in both map form and also graph/table form? This is the current landcover map I have made.

I haven't been able to work out a solution as of yet.

Curtis Price · Answer

I see a bunch of polygon boundaries in there. Since this information started out as a classified raster you probably will have better luck doing the tabulations in raster.

First mask your classified raster data to the study area with the Clip Raster tool (Clip_management in ArcMap), then try the Tabulate Areas tool to get a table of totals by study area (in raster).

Using raster format, it is also much easier to do things like create Boolean (true/false, 1/0) rasters to create maps of change one way or the other using the Raster Calculator. MUCH easier then trying to do this as polygon features.

Hope this helps.

Calculating LULC change 1973-2014 of a classified map (raster converted to shapefile) in ArcGIS 10.6

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