tomba wrote:It would be nice to be able to link directly to "USA Topo" map type. Perhaps in a similar way as how Google Maps and gmap4 do it: by adding "&t=<something>" to the URL.
WHY NO Gmap4? [ http://www.mappingsupport.com/p/gmap4.php
I use Gmap4 all the time since I learned of it since the resolution is at about 4X (2X linear dimension) the resolution of any previously available online topo mapping.
I used to use topozone years ago until Trails.com got their hands on it and made it super commercial. I've struggled with the full CA set of USGS CDs as well (never got my money's worth while being frustrated by their inherently clumsy use). Then I discovered mapper.acme.com and thought I'd found the ultimate (free!) resource. But a few years later I learned of gmap4 and have not looked back. I still use mapper.acme.com but rarely.
Anyway, it is a bit of a shock to look at the HST topos and find no use of the FAR superior and free(!) gmap4 topo mapping resource. Maybe it isn't essential since one can locate stuff on the HST map and then switch to Gmap4 for closer look. But it adds an extra layer between your info and the best look at your info.
So why? It's free to all.