On Mon, Oct 11, 2010 at 1:47 PM, dfdietrick <dfdietrick_at_gmail.com> wrote:
> The ImageTileLayer is at the mercy of JAI, and there are some images that,
> for some reason, take a while to read. I haven't found out what the difference
> is between these image and other images that load and display quickly.
They're just BMP's which I would expect to be quite fast. Any feeling
if they'll
go faster if I convert them to GeoTiffs? I've done that with some other images,
and it feels like they go faster.
I'm also seeing JAI take a LOT of RAM to read in these files. It causes the JAI
read to fail and fall back to the FileCache mechanism.
> For your situation, I think there is another solution - the beta version has a new layer,
Yup, I'm using the Beta already.
FYI, I tried to use gdal_translate to turn my BMP's into GeoTiff's,
but for some reason,
OpenMap didn't like those Geotiff's - there was something missing.
The data I have
with the BMP's is the lat/long of the 4 corners of the image.
So I punted and just added code to read my "worldfiles" like the
current WorldFile
code in OpenMap (and I've probably confused you now).
> the com.bbn.openmap.layers.imageTile.MapTileLayer, which uses map tiles like
> OpenStrretMap and Google maps. You can use GDAL to make the tiles out of
> your images, using gdal_merge and gdal2tiles.py.
Thanks - I'll take a look at this.
> I think the latest version in the repository
> has the modification that lets the gdal tiles be used,
The StandardMapTileFactory I have mentions GDAL.
> if it doesn't there will be an
> update checked in tomorrow. The difference is, you have to add a transform to the
> layer so it can figure out the right way to look up tiles for lat/lons. Details are/will
> be in the javadocs for the layer.
I'll check again tomorrow to see if you check anything in. Thanks!
> Let me know if you have questions,
>> Also, the background property in Layer - is that meant to work
>> standalone, or do I need to create a BufferedLayer and put the
>> layers i want to buffer in it?
Pete
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Received on Mon Oct 11 2010 - 16:18:54 EDT