They worked quite well in Algeria between Bechar and Agades. ONC charts kept us from becoming fossils.
On Thu, Sep 27, 2018 at 11:57 AM William R. Elliott <speodes...@gmail.com> wrote: > In reply to the joking comment that paper maps are better, well maybe if > you live in the Jurassic Period. Try to find paper topo maps any more. We > used to buy them at Miller Blueprint in Austin, but they were not cheap, > and they were limited in coverage. I guess that TSS still has vast files of > topo maps--I used to catalog them. Cavers used to make special trips to > Mexico City to buy topo maps. Now you can download them. > > Imagine the floor of a convention hall covered with topo maps or quads, > all properly tiled with the collars (white edges) cut off. Then imagine a > GPS location displayed on this as a point of light that moves as the > receiver moves. You can do all of that virtually on your tablet or phone > now. And the maps are mostly free. You can take a whole library of them > with you on your device. > > However, if you want to see some paper maps I produced, get *The Astyanax > Caves of Mexico*, AMCS Bulletin 26, at TCR. The many cave maps, area > maps, and the large, folded El Abra Regional map, were built using Walls, > WallsMap, QGIS, and illustration programs. The area maps have footprints of > the caves generated in Walls and sent over to WallsMap. The book is quite > usable in the field. And there even are photos of Jurassic Period cavers on > p. 178 and many other pages. > > This morning I posted the El Abra Regional map on > http://cavelife.info/Astyanax/Astyanax.htm It is 56 MB, and you can view > it in fine detail. The 10" x 29.5" paper map comes with the book. > > On that same cavelife page I also posted my *GPS article* and *Appendix > 5. How to Obtain Mexican Maps*, from the book. > > Happy topo maps! > > Living fossil from the Cretaceous Period... > > *William R. (Bill) Elliott* > > *speodes...@gmail.com <speodes...@gmail.com>* > > 573-291-5093 cell > _______________________________________________ > Texascavers mailing list | http://texascavers.com > Texascavers@texascavers.com | Archives: > http://www.mail-archive.com/texascavers@texascavers.com/ > http://lists.texascavers.com/listinfo/texascavers > -- Charlie Loving
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