[Geotools-gt2-users] Reprojecting large multi-band rasters

[Jess L. <jes...@us...>]

I have several questions about reprojecting a large multi-band raster. =
  My
input file contains 8 bands related to a landscape ( elevation, slope,
aspect, vegetation, etc.) and ranges from 60Mb to 300Mb.

A simple rewrite of the Ascii-grid plugin allowed me to read the data a=
s a
coverage, which I have successfully reprojected.   However, I'm current=
ly
limited to writing one band at-a-time.  To reproject and write a single=

image for one band with a 350Mb input file takes about 3 minutes --
yielding 24 minutes for the entire operation!

 Is "multi-band" the correct term to be using?  My data has 8 attribute=
s,
and all 8 are tied to a single point on a 2D grid.   Is "multi-band"
synonymous with "multi-dimensional"?

What is the best approach for reading the raster once and concurrently
writing all 8 bands as separate images?    My thinking was that maybe t=
his
could be done with a custom image encoder.

Or is there a way to render each sample dimension of the coverage as a
separate map layer and then write out each layer as an image?   I would=

prefer this approach because I could feed in a separate RasterSymbolize=
r
for each layer.

Thanks!
Jess Lacy
Senior IT Specialist, IBM Global Services=