Re: [pct-l] Topo! Map update

[Brick Robbins <brick@fastpack.com>]

At 09:59 AM 1/15/99 -0800, reynolds@ilan.com wrote:

>3-I have an unbroken map thru the Sierra. If any is using a GPS. I can
>provide way points. However, if you are not doing this section over snow,
>maps will be unnecessary in this section

As per Schaffer (Guidebook Author), this won't work well. The USGS topos
are based on arial photos and are not adequately field checked. Geograpic
features are inaccuratley placed on the maps, sometimes up to 1/2 mile off. 

The GPS will show the correct locations. Schaffer said he drew the line
representing the trail in relation to where the features were drawn on the
map, not where it should go accoring to lat and long.

If you shoot for a pass with your GPS accoring to lat-long taken from the
map, you may end up on top of the peak a half mile to one side.

YMMV, Standard Disclaimers Apply

--
Brick Robbins                       Laissez les Bons Temps Rouler!
mailto:brick@fastpack.com        http://www.fastpack.com/brick 


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