In article ,
Harlan Lachman wrote:

Dean thanks for trying to be helpful. Could you explain in a little
more detail what you mean. Sorry I am so ill informed.

What does it mean to need to calibrate a chart (why, how, what skills)?
Why would I want these charts if they are not useful to GPSPRo? Where
does onge get a calibrated USGS map that can work with GPSPro?

Will the provider of those charts have a person available by phone to
help guide one in using their charts for the first time?

TIA,

Harlan

GPSy Pro has the capability of taking any image and calibrating that
image with LAT/Long reference points, so as to allow positions to
be displayed on the image. this is done in the software by marking
Known Position Points in the image, with their LAT/Long. When three
(3) KPP's are calibrate the software can then interpolate any position
input from the GPS to it's corresponnding position on the image.
I have calibrated tiff, pict, jpeg, ect, images on my system.
USGS Quads are availabe from Internet Sites in tiff format with
calibrations already included in the file. If you would like to see
one, email me, and I'll send you one that I use all the time, with
GPSy and MacGPS.

Bruce in alaska
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