Hi,
1. uDig can currently be configured to default to
- A EPSG code of your choice, or:
- The CRS of the first layer added
2. The map properties can be saved but it will take a new plugin.
It is a very simple plugin extending the
net.refractions.udig.project.persister class. It is a very simple
class to write and I'd do it right now if I didn't have a critical
task at hand that can't wait. Otherwise any projection that is set
on a layer will persist. The layer properties allows you to specify
a layer's CRS in the same way as the map.
Jesse
On Apr 23, 2007, at 10:20 PM, Dane Blakely Springmeyer wrote:
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
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
