[Xastir] Maritime Charts on Xastir

[Curt, WE7U]

On Tue, 29 Sep 2009, Jason KG4WSV wrote:

> A bit of googling around leads me to suspect you can download the
> "RNC"s (raster files), then use an apparently free utility to
> re-project and convert them to geoTIFF (I'm guessing GDAL would
> convert them, too).

Xastir only handles geoTIFF in certain formats:  Those used for USGS
DRG's.  The coordinate system has to be in lat/long, and it can't be
tiled, it must be raster lines.  There are some other considerations
as well but I don't recall them off-hand.

There were tweaks at one point done to be able to handle the DOQQ
aerial image files.  I think that had to do with the skipping of the
border chopping and skipping stretching the projection into a
rectangle (originally needed to tile the UTM-projection DRG's
together).


> The vector data showed up as a (useless) bunch of points when I tried
> that route.

In what format?  Shapefile?

-- 
Curt, WE7U.                         <http://www.eskimo.com/~archer>
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