SPCS Definition Files
MICRODEM has two files with the definitions for the state plane coordinate systems (NAD83, in meters, and in a very few cases, in feet). These files have been revised, and only the most recent version will be used by the program, which will automatically download it. The files are not complete, and you may need to add either Geotiff, FIPS, or EPSG codes for some of the regions before you can use them. You can edit the files in the MICRODEM database display, or use Excel. You should also verify the values for each projection zone that you want to use; I have found several in error.
References for SPCS, for instance to find codes:
Last revision 5/16/2016