We build our maps using Authoritative Trails data from the US Forest Service
- Forest Service
- https://data.fs.usda.gov/geodata/edw/datasets.php
- GeoPDF, GeoTIFF and Vector data — https://data.fs.usda.gov/geodata
A project that shows how to process GeoPDFs from the USGS and USFS. — RobLabs.com/gdal-geopdf