The Utah Geological Survey created digital 15- and 30-minute vintage U.S. Geological Survey topographic quadrangle maps (1900-1966) by scanning original paper maps at a resolution of 500 dots per inch (dpi). These digital scans were enhanced in Adobe Photoshop as needed, with subsequent 16 point spline georeferencing in ArcMap. The resultant TIFF files are served on the AGRC ImageServer with on-the-fly collar clipping, producing a seamless map where adjacent quadrangle maps are available.
These files are also available from the SGID ftp site:
The SGID ImageServer now provides 1:24K and 1:100K USGS topographic maps with a background hillshade. The background hillshade together with the topo map contours should make it easier to visualize terrain. The layers, found with the Scanned Maps folder, are named:
At v9.2, ArcMap does not allow Image Server images to be clipped to a custom extent and exported locally.
But, using the Image Server Viewer that installs with the Image Server client, you can zoom to your area of interest and export the image to a local file using almost any file type, geographic extent, and pixel size you desire.
To consume the ArcGIS Image Server services via ArcGIS 9.1 or 9.2 these are the instructions you will need to follow. ArcGIS 9.3 comes with the Image Server client so you should be able to just add it by starting at Step 4 below.
In order to make the SGID Image Server imagery layers more friendly, all existing services have been renamed and grouped into category folders.
The old layer names (e.g. 100KDRG, 2006NAIP) will remain usable until March 1, 2008. After March 1st, the old layers will be deleted and any image service layers using the old layer names will no longer work. This means you'll want to delete the old image server layers from your ArcMap projects and add new ones from the newly created folders and layer names.
We realize that this will be an incovenience, however AGRC has received a volume of feedback on the Imager Server layer names usability. Hopefully, by making this one-time change, we will make using Image Server more intuitive.
