Hi Jan,
I use the com.bbn.openmap.layer.imageTile.ImageTileLayer to load
images. I think the ImageTileLayer does some filtering based on
scale, limiting what images it loads until the scale gets closer to
something appropriate for an image, but I'd have to look at the
javadocs to remember how that worked. You could also use several
ImageTileLayers held by a ScaleFilterLayer to get a multi-level effect.
The ImageTileLayer should be waiting to load the image data until that
image is on the map (and the scale is somewhat reasonable).
How big is the image dataset you want to manage?
Regards,
- Don
On Mar 30, 2008, at 5:18 PM, Jan Goyvaerts wrote:
> Hi,
>
> I'm just a newbie checking on OpenMap. More precisely, what would be
> the right way to go to use tiled & multi-levelled raster data (ie.
> geotiff) in OpenMap. I've seen a number of threads about the
> geotiffs in the archives. Some even with code contributions. I've
> briefly tried one of those and quickly ran out of memory; until the
> heap size was raised to 1GB. Although the original file is 20MB. In
> the end I had no image at all; but that's probably due to my own
> inexperience with the product... :-)
>
> So I was wondering whether I should do something special to have
> tiling and multi-level geotiff data working in a way it just loads
> the visible tiles into memory. Because that's what tiling and multi-
> levels are all about. Or should I go for another raster format
> altogether ?
>
> Many thanks for anything to point me into the right direction !
>
> Jan
>
> --
> Jan Goyvaerts <goyvaerts.jan_at_telenet.be>
>
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Don Dietrick, dietrick_at_bbn.com
BBN Technologies, Cambridge MA
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Received on Tue Apr 01 2008 - 13:32:24 EDT