[pct-l] maps

[Tortoise]

And the underlying USGS issue usually is funding. Takes money.

As I recall much of California's mountainous areas got mapped in the 
50's and 60's for the massive water projects being planned and then built.

In the early 70's I took a tour of the USGS map making facility in Menlo 
Park, CA and our tour got an overview of how they made maps back then. I 
think the technology has probably greatly improved since then with GPS 
and digital imaging and graphics.

Hmmm,  would be interesting if the USGS has an online explanation of how 
they make topos.

Tortoise

<> He who finishes last, wins! <>

I switched to Mac OSX rather than fight Windows
Using Mozilla Thunderbird  http://www.mozilla.org/products/thunderbird/



AsABat wrote:
> Yes, it's a USGS issue. The topography itself just doesn't change that
> much (Mt. St. Helens and freeway construction being notable exceptions).
> Unfortunately, that means trails are usually not up to date.
>
> So, using a topo map, one must trace the desired trail as best as
> possible from guidebooks and internet sources. Topo! has a great
> resource in that traces made by others are posted to the web for
> downloading. Matt Maxon/Trail 90 has some great traces on Topo!'s site.
>
> AsABat
>
>
>