Hmm,
With a bit more digging I answered my own question. In the map
properties I can assign a custom projection that works perfectly (by
copying in the .prj file) into the CRS window.
Then... now my more focused questiona are: 1) Can uDig be configured
to load a map in the projection of the data rather than lat / long,
and 2) can custom projections be "saved" in the map properties to be
used again or more easily assigned.
Jesse, just let me know if you would like me to put these in as
feature requests.
Dane
On Apr 23, 2007, at 9:54 PM, Dane Blakely Springmeyer wrote:
Hi uDiggers,
In my day job (mapping pacific salmon habitat, rivers, and
ecosystems) I am constantly projecting spatial data in custom
projections that place the central meridian in the center of the
Pacific Ocean (180 longitude). This works perfectly to stitch
together the North Pacific region of my focus, but tends to produce
anomalies when switching software apps. For example, I get the
error "Problem rendering: Latitude 90 degrees N is too close to a
pole" when I add my data as a layer in uDig.
I have been following the efforts to make relative paths work, and
therefore to be able to package uDig as a data viewer on a CD. This
is a feature I'm excited about but this projection issue would hold
me up. So, I'd be interested if anyone wants to take a crack at
either explaining to me what it would take to get my custom
projection to work in uDig or to detail if there is custom
projection functionality that I am not aware of.
I have posted an example dataset here:
http://danespringmeyer.com/north_pacific_watersheds.zip
it is a hack of the standard world mercator projection:
PROJCS["Clarke_1866_Mercator",GEOGCS["GCS_Clarke_1866",DATUM
["D_Clarke_1866",SPHEROID["Clarke_1866",
6378206.4,294.9786982]],PRIMEM["Greenwich",0.0],UNIT["Degree",
0.0174532925199433]],PROJECTION["Mercator"],PARAMETER
["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER
["Central_Meridian",180.0],PARAMETER["Standard_Parallel_1",
47.5],UNIT["Meter",1.0]]
Cheers,
Dane
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