These 50 index maps can be used as a quick reference
guide to choosing your 1:24,000 scale color USGS topographic 7.5
minute quadrangle from OMNI Resources.
These files are in ZIP format. Typically they range from 4 to 8 megabytes. The number following the name is the
approximate size of the zipped file in Megabytes.
Each file contains a .tif file which you must view using appropriate software, such as PhotoShop;