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PhotoTopo
PhotoTopo are digital USGS orthophoto imagery formatted for AutoCAD. These images come with an easy to use AutoCAD program which seamlessly joins multiple maps and geo-references the image in the real world. The program allows the user to place images into UTM and State Plane projections in both NAD 83 and NAD 27 datums.
Note on Image Samples:
Because these images have been converted to a JPEG format, and processed so they can be viewed with a web browser, the sharpness and quality is not as good as the source orthophoto from which they were created.
What is an Orthophoto
An orthophoto is an aerial photograph with the accuracy of a map. Orthophotography is used by engineers, surveyors, planners and environmental professionals needing rectified aerial photography at a reasonable cost.
These images are aerial photographs taken from aircraft flying at an altitude of 20,000 feet. The photographs are scanned and digitally corrected to remove distortion. The resulting image resolution is one meter. These are the lowest priced high-resolution orthophotography available.
Sold by Quarter 7½' Quad
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Price: $20.00 per Quarter |
Quarter Quad Name
Names corresponds with USGS 7½' quad name. |
| Price discounts are available on large orders. |
Please contact us have questions or wish to place an order. We will assist you in selecting the USGS quads you need.
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PhotoTopo Uses and Applications
PhotoTopo is an excellent cartographic base to overlay any number of associated thematic layers for displaying map information. Applications include land and timber management, routing, habitat analysis, environmental management, evacuation planning, flood analysis, soil erosion assessment, facility management, and ground water and watershed analysis. The accuracy of the orthophoto allow users to evaluate their data for accuracy and thoroughness and to update basemaps.
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