I am new to GIS and still learning. It’s interesting but becoming too complicated for me. A part of my project is to determine the land cover change in some counties in Texas from 2001 to 2011. So, a friend told me to use this approach using ArcGIS 10.3:
- I downloaded the Texas NLCD data
- I opened ArcMap, used the county shapefile to select the counties I’m interested in, I then overlaid the Texas land cover data (started with the 2006 data; just to try it out) on it.
- After selecting the counties, I created a specific buffer zone around them.
- Using ArcMap tools, I clicked spatial analyst tools →extraction→extract by mask→ it gave the option to select what land cover data I want in the input raster, I chose the Texas land cover data →then I selected the land cover data of my counties of interest into the input raster/feature mask, then selected an output file and ran it. The result was a number of legends with different colors indicating different land cover types. I am interested in specific land cover types (four actually). What can I do to get only the legends of the land cover types I am interested in?
- I also went further to click on the patch grid menu→then the spatial analyst (Fragstat interface), after which I chose the layer I wanted to use (land cover data of the counties of choice), clicked analysis by class and chose only class area under the class options menu, then I clicked run. I got an error saying Fragstat unable to run, and a table with no data output.
Is there anything I should have done? Am I using the right approach for this analysis?