Hi Evan,
Goal: Generate a 960x720 satellite image centered over the U.S. which
exactly matches an existing 960x720 image of the US. This image needs to be
automatically generated every ~15 minutes as new satellite data comes in.
STEP1: Create custom Projection named "custom_us"
Type: Stereographic, False Easting: 0, False Northing: 0, Scale: 1, Tangent
lat: 90.0, Tangent lon: -96.0
STEP2: Move the bounding box of the projection by editing
".undata/idv/DefaultIdv/projections.xml" <after hours of trial and error>
Just curious why the hand editing of the projection file? I know our
projection editor needs work. What could we do in the IDV to make this
process easier? Enable the exact setting of the bounding box values? Any
ideas?
Also - is there anything we could add to the ISL to have made this
process easier?
For example, we just added last week a viewpoint tag:
http://www.unidata.ucar.edu/software/idv/release/nightly/docs/userguide/isl/DataAndDisplays.html#viewpoint
that allows for scripted positioning of the viewpoint.
We also have a center tag:
http://www.unidata.ucar.edu/software/idv/release/nightly/docs/userguide/isl/DataAndDisplays.html#center
that allows for positioning.
We can also do clipping of the image:
http://www.unidata.ucar.edu/software/idv/release/nightly/docs/userguide/isl/ImagesAndMovies.html#clip
[...]
STEP11: Run isl script to generate gif image. Result: creates an image NOT
960 x 720 pixels, instead it creates an image which is the size of the
display panel (1164 x 1002 pixels) and is clearly distorted from the view I
need.
When you run isl in onscreen mode the view size is whatever size the gui
layout of the window ends up with. What you should do is set
offscreen=true and you can set the size of the view in the bundle tag
with the width/height attributes:
http://www.unidata.ucar.edu/software/idv/docs/userguide/isl/DataAndDisplays.html
-Jeff
