the USGS Store
Go to the USGS Store and select Maps/State Topographic Map Indexes….Digital indexes for use in GIS:
- Download indexes in Shapefile and Geodatabase formats through The National Map Downloader.
- For maps in the US Topo and Historical Topographic Map collections, click here for a database dump in CSV format.
What map does the USGS use?
US Topo is the current topographic map series. These are modeled on the legacy 7.5-minute maps, but are mass-produced from GIS databases and published as digital documents.
What is USGS TNM?
The National Map Viewer (TNM Viewer) is the one-stop destination for visualizing all the latest National Map data. Let’s make MY MAP!
How do you read USGS 7.5 minutes map?
The Top
- Starting at the top right corner of the map, you will notice the map’s name and its series.
- Lines of longitude are called meridians.
- So a 7.5 Minutes Map will always cover roughly 8.5 miles of latitude (North to South) but a varying amount in longitude (East to West).
- The Bottom.
What do the numbers on a topographic map represent?
Horizontal distance is found on the scale. As you look at the map, notice that the contour lines enclose smaller and smaller areas. The smallest circles represent the tops of peaks, and some are marked with x’s with numbers next to them. The numbers are the elevation at the top of the peak.
Where can you find an index on a map?
A map is usually named after the most prominent city, town or natural landmark shown on it. Topographic map indexes are located at the first table in the Map Room (TOPO MAP INDEXES). There is one index for each state.
Where can I buy USGS maps?
The online USGS Store
The online USGS Store is the only site for ordering paper topographic maps. Use the Store’s Map Locator or the Keyword Search box in the upper right.
What does USGS stand for?
The U.S. Geological Survey (USGS) has been the primary civilian mapping agency of the United States since 1879. The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles. Download all dates and scales of USGS topographic maps free of charge from the following applications or order paper copies of all…
How do I find the USGS state Topographic Map Index?
TopoView – Click on any of the round map scale indicators on the right side of the map. The National Map Viewer – Click on the Layer List icon at the top that looks like three sheets of paper and select “Map Indices”. Go to the USGS Store and select Maps/ State Topographic Map Indexes.
How do you cite a USGS map in APA?
For a map produced by the USGS, the agency is considered the author and the U.S. Department of the Interior is considered the publisher. The map is therefore cited as follows: United States Geological Survey. Title. Map. Edition or Series. Reston, Va: U.S. Department of the Interior.
What are the different types of USGS topographic quadrangle maps?
Today, USGS topographic quadrangle maps are divided into two product types: 1. US Topo is the current topographic map series. These are modeled on the legacy 7.5-minute maps, but are mass-produced from GIS databases and published as digital documents.
