Author Topic: Alternate California topographic map servers?  (Read 2465 times)

steverod

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Alternate California topographic map servers?
« on: January 31, 2010, 04:01:03 PM »
Is anyone else using a server for topographic maps other than Terraserver (particularly for California)?

For whatever reason (datum issues?), there are places where the maps are heavily offset within California; my understanding is that this isn't a TopoFusion issue but rather an issue with TerraServer and the underlying USGS maps (but other map sources have worked around this). It wouldn't be so bad if it was someplace no one would want to hike, but sadly, Yosemite NP has a number of these in prime hiking terrain (Hetch Hetchy Reservoir has a sudden shift, for example, as does the area near Tuolumne Meadows, right where two maps are stitched together).

It's particularly annoying because I wanted to get some Garmin custom maps for upcoming trips in these areas, and it wouldn't really do to have my track running in the reservoir (or worse, following the GPS straight into the drink...).

This isn't a problem with TopoFusion per se but it is something that will affect anyone trying to use TF in the affected regions.

I've skimmed the User WMS docs and some of the links presented elsewhere in the forum but didn't find anything immediately obvious (nor do I fully grok the WMS incantations).

Thanks,
Steve