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125 Years of Science for America - 1879 to 2004
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USGS Frequently Asked Questions

FAQ's about Topographic Maps

Where can I buy topographic maps?
Do you have map data in digital form?
How can I find digital map data?
How much do maps cost?
What is a Topographic Map?
How can I find survey benchmark information?
How can I find and get historic USGS topographic maps?
Can anyone just drop in on an Earth Science Information Center (ESIC)?
How large is the NAD 27 to NAD 83 shift?
Can you send me map ordering information?
Why does the USGS charge for maps when our tax dollars were used to make them?
How can I view USGS digital raster graphics (DRGs)?
What is declination?
How can I find field record materials (original field notes and related material made by USGS geologists) and mapping notes?
What is a digital raster graphic (DRG)?
How can I clip the map collar off my digital raster graphic (DRG)?
What are the formats for digital raster graphics (DRGs)?
What is the resolution of a digital raster graphic (DRG)?
Where do I find the number of rows and columns in a digital raster graphic (DRG)?
What is the difference between plastic and paper maps?
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