Tha would be an unwarranted amount of work on your part. Since there are only (at present) 86 waypoints I have to deal with, it is easy for me to just use Google Earth to navigate to each point and write down the elevation from the screen. I have some of the 86 done that way already and will collect 14 more this morning, and I can assign varying degrees of credibility to them based on whether they are on top of a ridge or down in an arroyo, and whether the barometric readouts (particularly when I can work from an average of multiple data readings) seem not too far out of line with what the GPS satellites are saying.

Thank you very much for the offer. However, if the idea of playing with this really appeals to you, go ahead and I can compare my manually collected elevations to what your results show as an error check.

tanstaafl.