[Xastir] Projects we can learn from?
Tom Russo
russo at bogodyn.org
Wed Aug 23 23:12:41 EDT 2006
On Tue, Aug 22, 2006 at 07:45:49AM -0500, we recorded a bogon-computron collision of the <gerry.creager at tamu.edu> flavor, containing:
>
> projection via proj4 and gdal is handled well in mapserver. We can thus
> request a WMS image in WGS84 (lat-lon unproj) or mod xastir to cover
> different projections and get "pretty" maps. MY thought on this is that
> most of our work w/ Xastir, especially the SAR, is local work and covers
> a small enough area that planar flat projections work. How many of us
> are further north/south than 60 or so degrees? So lat/lon unproj
> representation is somewhere between good enough and a good idea. And,
> for all the work Curt's done on rhumb lines, etc., given a local area
> planar workzone, simple geometries can accomplish most of our requirements.
With one important exception: maps printed out out of xastir in its
unprojected coordinate system are almost useless to ground resources since
it is not a conformal projection. That is, if I were to hand a search
team a map from xastir they could not use it with their compass to transfer
bearings from map to field and back at all. This is a major shortcoming
in my opinion, since it means that I always have to have some other way of
producing maps for such a use.
--
Tom Russo KM5VY SAR502 DM64ux http://www.swcp.com/~russo/
Tijeras, NM QRPL#1592 K2#398 SOC#236 AHTB#1 http://kevan.org/brain.cgi?DDTNM
"And, isn't sanity really just a one-trick pony anyway? I mean all you get is
one trick, rational thinking, but when you're good and crazy, oooh, oooh,
oooh, the sky is the limit!" --- The Tick
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