On Jul 23, 2009, at 1:39 PM, Patel, Ronak Avinash (US SSA) wrote:
Howard and Mateusz,
Thanks for the help...really appreciate it. Haven't really found many
people out there that know the low levels as much as you guys do.
I was looking at the LAS 1.2 spec and it says the Georeferencing
information requires the GeoKeyDirectoryTag Record.
I am able to write that tag out but I see that lasinfo always shows
the
version to be 0.0.0 regardless of what I put in those fields.
According to the spec, the data should be arranged:
wKeyDirectoryVersion = 1 (2 bytes)
wKeyRevision = 1 (2 bytes)
wMinorRevision = 0 (2 bytes)
wNumberOfKeys = the number of sets of 4 unsigned shorts to follow
I write out the above shorts and 0 out the rest of the data byte array
but lasinfo always shows 0.0.0 as the version.
Is the spec wrong? Or is something else going on here that lasinfo and
libLAS are doing??
Are you linking libLAS with libgeotiff when you compile? libLAS
completely ignores georeferencing if libgeotiff is not linked at
compile time.
Howard
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