[HOT] open geology map
hlhj2 at srcf.net
Fri Mar 13 18:20:50 UTC 2015
I think that a moderate list of specific conventions, well-documented,
will be needed, because the conventions already exist in geological
mapping. For instance, we'd probably want a consistent way to tag a
fault with the direction that it moves in.
Thank you for your advice on subtagging rock types. I've been trying to
figure out what the specific conventions ought to be, in order to mesh
with OSM and other common systems. Help with this is very welcome. Would
anyone be willing to look over my draft geological ontology and tell me
what I've done wrong before I make a set of feature proposals?
Sorry, I've managed to be very unclear. The 3-D info is for the slope of
the geological structures, not the slope of the land they are embedded
in. High precision isn't needed, and even within-50-degrees precision
can be useful. This data is measured on an exposed rock surface, with a
clinometer (a dangling weight on a calibrated circle, usually built into
geological compasses but easy to make from cardboard and string). I
should probably just have left the technical description out, apologies.
I think it's OK if effort is patchy. The geology in and near urban areas
has the most humanitarian importance; no-one would have heard of the
Mameyes landslide had it not hit a city, and 2010 saw umpteen
zero-fatality earthquakes larger than the one that hit Haiti.
Although I think data donations could also be an important source, I do
think getting a small crowd of geological mappers is feasible. But as
you say, we'll have to see.
For anyone who thinks geological mapping might be fun:
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