Hello,
I wonder if you discovered what was wrong in this scenario
(http://www.mail-archive.com/[email protected]/msg00202.html)
. I am attempting to and select first only first returns and subset
using the following:
$ las2las -i ucd_03.las -first_only -clip 409849.040000 4534962.800000
409949.04 4535062.8 -o ucd_03_fr.las
and get a similar error message:
clipped: 5135796
Not able to fetch a point. LASReaderH is invalid: Pointer 'hPoint' is
NULL in 'LASPoint_Destroy'. (3) from method LASPoint_Destroy
lasinfo on the created file returns:
---------------------------------------------------------
Header Summary
---------------------------------------------------------
File Name: ucd_03_fr_s.las
Version: 1.2
Source ID: 0
Reserved: 0
Project ID/GUID: '00000000-0000-0000-0000-000000000000'
System Identifier: 'MODIFICATION'
Generating Software: 'TerraScan'
File Creation Day/Year: 0/0
Header Size 227
Offset to Point Data 229
Number Var. Length Records 0
Point Data Format 1
Point Data Record Length 28
Number of Point Records 0
Number of Points by Return 0 0 0 0 0
Scale Factor X Y Z 0.01 0.01 0.01
Offset X Y Z -0.000000 -0.000000 -0.000000
Min X Y Z 409849.040000 4534962.810000 73.570000
Max X Y Z 410860.310000 4535963.860000 239.200000
Spatial Reference
and
$ cat ucd_03_fr_s.las
returns
LASFMODIFICATIONTerraScan�� {�G�z�?{�G�z�?{�G�z�?���ףp=�A���(�Aq=
��MQA>
׳�lqagffff�...@�g�zdr@
Im suspicious that it might be that there is no spatial reference
defined so I'm working on how to define one but wanted to ask in case om
off track.
Thanks very much!
PT
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