USGS Maps

Click this button to learn more about USGS Maps; legend explanations, how to read, etc.

USGS Quad Maps

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A New Generation of Maps

Note from USGS:

US Topo is the next generation of digital topographic maps from the U.S. Geological Survey. Arranged in the traditional 7.5-minute quadrangle format, digital US Topo maps are designed to look and feel like the traditional paper topographic maps for which the USGS is so well known. At the same time, US Topo maps provide modern technical advantages that support wider and faster public distribution and enable basic, on-screen geographic analysis for all users.

US Topo maps are available free on the Web. Each map quadrangle is constructed in GeoPDF® format from key layers of geographic data – orthoimagery, roads, geographic names, contours and hydrographic features - found in the National Map, which is a nationwide collection of integrated data from local, State, Federal, and other sources.

US Topo users can turn geographic data layers on and off as needed; zoom in and out to highlight specific features or see a broader context; and print the maps, in their entirety or in customized sections, on a wide variety of printing devices. Additional analytical tools are available free for download. File size for each digital 7.5-minute quadrangle is about 15-20 megabytes.

As the US Topo product evolves, the USGS will provide digital versions of earlier edition topographic quadrangle maps and will incorporate additional geographic data layers from the National Map.

Topographic Maps for the Nation

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USGS Historic Maps for Ohio Now Online:

http://nationalmap.gov/historical/

The USGS Store:

http://store.usgs.gov

PDF Information Page:

http://pubs.usgs.gov/fs/2011/3009/

Scanning and Georeferencing Historical USGS Quadrangles

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Samples:

Click on any of the images below to open up the PDF USGS Map ...


Blanchester OH, Edition of 1907	Clarksville OH, 1960	Sabina OH, 1917	Wilmington OH, 1961

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There are NEW (2010) USGS Maps available also:


Wilmington OH, 2010	Clarksville OH, 2010	Sabina OH, 2010	New Vienna OH, 2010

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2010 Intelligent PDF Maps:

Notes and Comments...

Screenshot:

After opening up one of the new USGS maps, you can click on the box, in the Table of Contents on the left, to expand the layer list. Then, you can click on the picture of the eye to display or not to display any of the layers from the list...


Showing Aerial Photography	Not Showing Aerial Photography

Note's on the 2010 USGS Maps:

- The Imagery is from the National Agriculture Imagery Program, flown in June of 2004, and is 1 meter pixel resolution. NAIP Fact Sheet

- The Roads as shown on the maps is data from Tele Atlas, and may show incorrect road names spellings, or inaccurate placement on the map, over-top of the aerial photography.

- The Names, i.e. Place Names, are from GNIS, 2008; Geographic Names Information System.

- The Hydrography is from the National Hydrography Dataset, 2004. When compared to the Hydrography dataset from the County GIS Database, there may be differences in the placement of the channel lines. This is due to the resolution of the data at which it was created.

- The Contours are from the National Elevation Dataset, 2004, and are at 10 Foot Intervals. Please keep in mind that the contour data in the Clinton County GIS System is at 2 Foot Intervals.