[Liblas-devel] Can Liblas only update a small portion of the points in Lidar file?

[Hongwei Shen]

Thank you for the answer, Howard.

I'll check if I can add this support.

Thanks,
Hongwei


On Fri, Jan 6, 2012 at 1:47 PM, Howard Butler <hobu.inc at gmail.com> wrote:
>
> On Jan 6, 2012, at 12:16 PM, Hongwei Shen wrote:
>
>> Hello,
>>
>> The scenario is: the user opens a large Lidar file,  changes the
>> classification labels of a small number of points and save the changes
>> to the file.  When the Lidar file is huge, it is time-consuming to
>> output all the points. So it would be better if only the modified
>> points are updated in the Lidar file.  According to my understanding
>> now, Liblas needs to save  all the (changed and unchanged) points to a
>> new Lidar file. That's because Liblas can open a Lidar file either in
>> read-only mode or write-only mode, but not in read-write mode.
>>
>> Do I understand correctly?  Is there a way to only update some points?
>
>
> Yes, your understanding is correct. libLAS does not support in-place updating of points.
>
> Howard
>