[gdal-dev] LAS support

Joaquim Luis jluis at ualg.pt
Thu Nov 28 06:28:44 PST 2013


> IMHO point clouds are special form of vector data. But still, an OGR
> driver would not be a viable solution.

... or as already mentioned of rasters (or grids as I prefer to call 
them when they are so).
By accident I found that that grids stored as XYZ in laszip are 3 times 
smaller than the same grid in netCDF with a deflation level of 9 (the 
maximum).
That makes it a REALLY interesting grid storage format.

Joaquim

>
> Did you have a look at PDAL (http://www.pointcloud.org/)? It is
> similar to GDAL and seems to have a built-in driver for LAS files.
>
> regards,
> Fabian
>
> On 11/28/2013 03:09 PM, Mateusz Loskot wrote:
>> On 28 November 2013 13:56, Rui L. Pires<rlpires at gmail.com>  wrote:
>>> On 28 November 2013 11:03, Mateusz Loskot<mateusz at loskot.net>
>>> wrote:
>>>> On 28 November 2013 09:51, Rui L. Pires<rlpires at gmail.com>
>>>> wrote:
>>>>> Would there be any particular reason for not supporting it?
>>>> Point cloud is not a vector, not a raster either? :-)
>>>
>>> That might be debatable, but it won't be me reopening that
>>> discussion. Having said that, if you could assure me that all
>>> formats supported in http://www.gdal.org/ogr/ogr_formats.html are
>>> vector formats, I would have understood your point (of not
>>> offering a LAS driver).
>> Rui,
>>
>> I intentionally put question mark to indicate it's open question
>> for me as well. The nature of LiDAR data might be confusing and I'm
>> interested to learn more about it. Dale Lutz said, "point cloud is
>> a badly behaved raster". I (used to) say, it's not a vector. But I
>> still haven't found clear answer "what is it" really :)
>>
>> Best regards,
>>
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