[Xastir-Dev] Making geo maps fit the world.

[Gerry Creager]

Couple of thoughts.
1.  Looks like the projection is probably Lambert Conformal Conic with a 
central meridian of -98.5 or so.  We don't do well with reprojection at 
this point (bring on GDAL!) so that's gonna be a bit of a problem.
2.  The refresh interval on this forecast is probably more like hours, 
than 10 minutes.  You can conserve some bandwidth by geting it every 
hour or 2...  Radar refreshes at a 6 minute rate.

Reprojection is a problem for you here.  Until we either take full 
advantage of proj4 or migrate, we won't be able to account for all the 
strange and wonderful ways people have developed for drawing curved 
shapes on flat paper or monitors.

And on that note, I've been slamming my head against proj4 in mapserver, 
and decided that while I may know something about reprojection, it's 
certainly NOT in the context of THAT code.

73, gerry

Jerry Chamberlin wrote:
> I have:
> 
> #IWIN NOAA COMPOSITE
> URL     http://iwin.nws.noaa.gov/iwin/images/92f.gif
> #                       X               Y       Long    Lat
> TIEPOINT             0          0          -129.00000   53.00000
> TIEPOINT             1023         767       -67.00000   20.00000
> IMAGESIZE 1024 768
> REFRESH 600
> TRANSPARENT #ffff
> 
> Been playing to make fit.
> How does one adjust for the curve of the eath.
> Is there a tag or formula ?
> THe weather alerts show up nice on top this NOAA Composite. 
> 
> The Net Lab year 2000 and beyond Internet Education is Science
> http://www.netlab.org
> WA0JRJ - Jerry
> used to be ICQ 6408731
> used to be AIM PappyJerry
> 
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