before and after (scroll right for the present)
Click on image to download it.
Full 2011 version
as currently seen at the Burke Museum
or
The YouTube copy
or
640-pixel version for 2011 computers
Progress report on 2023 updates
before and after (scroll right for the present)
Click on image to download it.
This is our biggest pretty image as of 8/29/2000. It is
14535 by 11946 30-meter pixels, considerably more detailed than the gif
file that you see. The data is stored in the UTM zone 10 projection, so
integrating information east of 120° would be difficult.
A Tif file of this image is 12 inches high and is
recorded at 200 dpi. It unzips from 8345169 bytes to 14092572 bytes.
The saturation seems to have dropped in the creation of the tiff file.
and here is a version without labels
and here's a tif file for Derek
and here's a shapefile of the lobe
and 
Thorson's original figure
and (Why didn't I add this long ago?)
Thorson's original contours
from Quaternary Research Volume 13, Number 3, May 1980.
(Note, Thorson maps were digitized from a bound journal article. We now have access to his
original mylars, and are thinking of scanning them.)