Write raster KMZ - in a tiled format ?

You may need to manually tile the raster yourself. I'm not sure how the writer would cope with multiple images coming it. Check out the WebMapTiler. Then I think you'd need to create a GroudOverlay layer?

Matt,

Thanks very much for your reply.

.............

There is only 1 input image and 1 output image.

eg jpg or tif to kmz

..............................

This query is regarding compression within a single image, not a series of images like a cached map service (WebMapTiler).

..............................

High-resolution images can be accessed more efficiently — and compression tends to work better — if the image is broken into roughly square tiles.

Sometimes u see this when a screen image is refreshed and the image is drawn block by block eg in 512 x 512 blocks.

Maybe within FME - writing to KMZ like this (512 x 512) - is not possible (yet) - unlike tif and geotif

..............................

I'll dig into the WebMapTiler a bit more - but not sure if this is the route ???

..............................

Thanks once again

Regards

HJL

Perhaps not for sure - and I suspect you might be right about tiling when it comes to KMZ. given that kml is xml based I suspect that it would be pretty slow to figure out which tile should be loaded.

Try setting the parameter Generate Super-Overlays to Yes. According to the documentation, it should automatically turn rasters into a pyramid/tile set of images.

Mark,

Thanks very much for your reply.

The SuperOverlays ends up creating a large file > 50 MB.

The quality is also no better than the standard FME KMZ output - its possibly slightly worse !!!

...........................

Its not so much the pyramids that I was after - which are useful for different zoom levels typically.

More the tiled data in 512 x 512 blocks (similar to Geotif) - IF at all possible.

...........................

I might have to just stick with the standard FME KMZ raster output = one large block of pixels.

The quality is certainly good - and the file size is reasonable.

...........................

Thanks once again

Regards

HJL