Monday, September 28, 2009

A Pre-Political(?) Canyon! (Success for a map test revised 6 Sep 2010)

The last of the western military surveys, that of George Wheeler, mapped parts of the Southwest, including the course of the Colorado River. This sheet is dated 1873, and doesnt quite make it to the Grand Wash Cliffs. It makes a nice test of inserting images, since at first, I could only put in the link: Download JPEG2000 image (5768 kilobytes)   
Now here it is.

Clicking on it will give a really large, readable version. The map is from the Library of Congress, Geography and Map Division.

It appears that the only marked route across the Canyon is the Sheavwitz Crossing, in the vicinity of Toroweap. An interesting trek, and I wonder if it was more than a one-time event.


  1. Hmmm...can''t open the map because i don't have a program to open a .jp2 file. Did Powell have this probelm? Can you convert this to a .jpg file?

  2. It says it is a JPEG2000 image. Its from the Library of Congress, so I guess I had better find a better source. Anyway it leaves off the western Canyon. I just havent been able to get something satisfactory, but I will keep trying.