[Liblas-devel] LAS file Coordinate Systems

[Patel, Ronak Avinash (US SSA)]

Mateusz,

So you're saying the Geotiff specification describes how to handle the
case where files cross UTM boundaries? 

Ronak


-----Original Message-----
From: Mateusz Loskot [mailto:mateusz at loskot.net] 
Sent: Tuesday, July 21, 2009 4:35 PM
To: Patel, Ronak Avinash (US SSA)
Cc: liblas-devel at lists.osgeo.org; Froumis, James A (US SSA); Morgan,
Michael L (GXP) (US SSA); Manent, Lesley S (US SSA)
Subject: Re: [Liblas-devel] LAS file Coordinate Systems

Patel, Ronak Avinash \(US SSA\) wrote:
> Therefore, I am relegated to UTM values. However, how does the LAS
spec
> deal with collects which cross UTM boundaries?? How do you indicate
that
> a LAS file falls between 2, 3, and possibly 4 UTM zones??

You need to follow GeoTIFF specification in this regard.
libLAS links to libgeotiff to access GeoTIFF features necessary to
handle
CRS/SRS. libLAS does not implement GeoTIFF specification itself - it
would
be a big and painful task :-)
So, it's very reasonable to use libgeotiff.

I'd suggest to follow the same approach and try to find GeoTIFF
implementation in Java or perhaps there is Java binding for libgeotiff
available.

Best regards,
-- 
Mateusz Loskot
http://mateusz.loskot.net