Mount Saint Helens DEMs

I finally have the pre-eruption Saint Helens DEM. The shaded-relief image derived from it shows it to be a level-1 DEM with many east-wide artifacts. The new DEM is a level2 product. I also have the 10-meter DEM (with vertical units in feet.) The lower right quarter of the image above shows the thirtymeter DEM mosaicked and updated by resampling the 10-meter data.

As young people do not remember the USGS DEM format instituted by Thomas Jefferson (or maybe it was a little bit later), I have converted the DEMs to tif files. They are UMT10-NAD27.

Other quadrangles were updated to show mudflows from Mount Saint Helens. I do not have the pre-eruption versions of those areas.