The FSTopo database was originally populated with Cartographic Feature File (CFF) data. CFF data were derived from the standard Forest Service Primary Base Series (PBS) or Single Edition Series (SES) map as part of the Forest Service National Geographic Information System Plan. PBS and SES maps were developed from the U.S. Geological Survey 1:24,000-scale, 7.5-minute topographic map series, with enhancements and regular revisions to satisfy Forest Service needs. Except in Alaska, where 1:63,360-scale maps are used, the original USGS 1:24,000-scale source maps were constructed to meet National Map Accuracy Standards, which require that 90 percent of all well-defined features shown on the map are within .02 inches of their true location. At a scale of 1:24,000-scale, .02 inches represents 40 feet on the ground. CFF data were collected using methods and the best technologies available to ensure that digitized elements were captured within .003 inches of corresponding elements shown on source maps. GSTC uses the same data collection accuracy standard for additions and revisions to the data.

Over time, the legacy CFF data will be replaced (at least partially) with data from nationally standardized sources. Thematic or layer-based metadata will be updated accordingly as new data sources are added to the FSTopo database by means of data revision activities.

FSTopo elevation contours are derived from data obtained through the USGS National Elevation Dataset and processed using ArcGIS-based contouring tools.