Area calculations from a .tif file
I am working on a project to compare land uses in Arizona as a percentage of total land area. I am working with a tiff image from the USGS Land Cover Institute that has color bands representing various land uses, and I'm trying to calculate total area for each usage type. The file I have did not have a data table associated with it. I have no formal GIS training, so I'm working from online tutorials and the like. To add another wrinkle, the license I'm working with does not include the spatial analyst tools package. Most of the methods I am reading about require these tools. Is it even possible to do accurate area calculations without spatial analysis tools? Thank you in advance for any advice.
Mapping Center Answer:
I think most of your solutions for this will require Spatial Analyst as that is the extension that allows you to work with raster data such as a tiff. However, you could simply digitize the areas that you want to calculate the area for and then add a field and calculate the area. Here is a link to the help topic on how to calculate area.
More automated solutions will require the Spatial Analyst extension; however, as you are at an academic institution, you should actually have access to all the extensions! Please contact your site license manager to see about this. Once you get the extension, let us know and we can offer more automated solutions to this problem.
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