Data Sources

How to Download USGS Topo Maps for Free

If you’re looking for topographic maps (contours, place names & hydrography) for the United States, the first place to look is the USGS topo maps series.

Append Tool Feature
GIS Analysis

Append Tool in GIS

The Append Tool adds data from one or more sources of data and puts it into an existing target dataset, without creating a new dataset.