The blog post is a product of the Arizona Geological Survey.
The DGMs are derived from analog (paper) geologic maps published between 1986 and 2000. Each DGM will be accompanied by geologic map plate(s) in PDF format (graphic compares Picacho Peak-1999 with Picacho Peak-2022), GeMS geodatabase, Geopackage, and Google Earth KMZ.
For more information and for a list of the DGMs scheduled for release: https://blog.azgs.arizona.edu/blog/2022-09/transforming-33-analog-geologic-maps-digital-map-products
