Hi
There are 2 main possibilities that I can think of.
1. Make sure that you are passing in a heap space parameter to your
application or increase it if you already are. For example
-Xmx512M will assign 512 MB of memory to the heap space of the JVM.
That should help with the problem.
2. GridCoverage support is less than perfect at the moment (although
Jody is playing with a new version that shows promise) and takes much
more memory than it should. So it is likely that the World+Image is
what is causing problems. I'm not totally sure what can be done
about this. But if it is causing problems then perhaps some memory
optimizations can be made.
Jesse
On 5-Dec-06, at 3:33 AM, Schneider, Michael wrote:
Hello,
using uDIG RC 5 I got a heap space error after adding several
layers. Each layer was created from a very small graphic (png or
gif file of less than 1 KB) together with a world file. The same
was true when each layer was created from a small shapefile.
The intension is as follows: The user creates a list of locations
and these locations are shown on a map. When creating a new list of
locations, the old locations are removed from the map and the new
ones are displayed.
I did it similar to the descriptions in the FAQ "How do I create a
map programmatically" and "I want to add an image to the map, how
do I do that?"
I created a map using createCreateMapCommand
I added about ten layers (see above what the layers looked like)
with either createAddManyLayersCommand (all layers together) or
createAddLayerCommand (one layer at a time)
When a new list was created I removed the old layers using
createDeleteLayer command, set the new bounding box with
createSetViewportBBoxCommand and added the new layers to the map.
After doing these several times I run into the heap space error.
I also get this error when I only add and remove one layer (i.e.
location lists with only one entry), but it takes longer to get the
error.
I also tried it "the old way" with MapFactory.processURLs - with a
similar result: The error appeared as well, but it took longer to
get it.
Am I doing it the wrong way? Is there a better way?
I also wanted to try RC 6a. Are there any changes related to the
layers view and showing the map? In RC 5 after adding the layer to
the map they were displayed at once. In RC 6a I can see them in the
catalog and in the project window, but they do not appear in the
layers view automatically and are not displayed. I'll have a closer
look to that to see whether I get the heap space error in RC 6a as
well.
Michael
_______________________________________________
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
