Projecting USGS DOQQs (Digital Orthophoto Quarter Quadrangles) for use with State
Plane Coordinates
If you want the USGS DOQQ files to match perfectly with, say, Boulder County or City of
Boulder digital maps, you need to project them into State Plane Coordinates (Colorado North
zone).
First, copy the folders containing the DOQQs you want to your memory stick. Each folder on
the Z-disk contains four "quarter" quadrangles and their support files. This is because each
24:000 scale USGS quadrangle is covered by four air photos (SE, SW, NE, NW).
These are large files. Each folder contains about 188MB of data. Be sure to check that you have
space on your memory stick before copying any of the folders.
Copy files a folder at a time to your
memory stick.
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Now, start ArcGIS and open the ArcToolbox and double click on "Project Raster".
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Click here to open
Input Raster menu
Pick the TIFF
image that you
would like to
project
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You can type in
this address and
file name
Click here to get
Spatial Reference
Properties menu
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Choose import
Pick a file like this that
is already in State
Plane coordinates
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Click here
Pick this option
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Once you have imported the State Plane settings from a file, the Spatial Reference Properties
should look something like this.
Press "Apply", then "OK" to return to the "Project Raster" menu.
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The final settings should look something like this:
Press "OK" and the projected file will be created.
Since there are four quarter quadrangles in each quadrangle, you need to repeat these steps for
each DOQQ you wish to import.
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