Questions tagged [laz]
It is the compressed version of lidar las files from the open source software LASzip
11
questions
4
votes
1answer
1k views
Accessing raw data from LAZ file in Python with Open Source software?
Is there anyway to access raw "LAZ" (not LAS) datasets in Python? I was trying to with ArcPy (I'd prefer not too), but it doesn't seem able to access LAZ. I'd prefer to work with the raw LAZ file and ...
2
votes
1answer
233 views
LAS/LAZ parser for NodeJS
I cannot find any popular libraries for parsing (reading into memory) of LAS or LAZ (lidar data) files in NodeJS (desktop Javascript)
https://github.com/yuyou/liblas4node/blob/master/lib/liblas.js
...
2
votes
1answer
94 views
Optimizing workflow for FUSION's PolyClipData?
I have multiple large LiDAR datasets (.laz) from different areas, where I need to extract buildings. I have prepared a shapefile containing a buffer around the buildings I care about, and are using ...
4
votes
2answers
464 views
Why did Esri create .zlas compressed LiDAR files instead of adopting .laz?
I am talking about the Esri Optimized LAS file format for compressed LiDAR files (.zlas).
While the uncompressed format (.las) from ASPRS was adopted by practically the entire Remote Sensing and GIS ...
3
votes
1answer
535 views
error: Compression support not enabled in liblas configuration
I am using liblas 1.8.1 and laszip 3.1.1 on Mac OS High Sierra. Both were installed using brew install <package>. I am looking to get information from a laz file using the following command:
...
2
votes
2answers
1k views
Converting LiDAR data (.laz) to DSM in .asc format
I'm looking to convert a LIDAR scan in .laz format into a DSM in ASCII Grid format, in order to calculate RF propagation in an urban environment from a given transmission location (bonus: converting ...
1
vote
1answer
462 views
Batch processing las files with LASzip from QGIS?
I am using QGIS 2.16 version. I added LAStools plugin and executed batch process, in a way that I have to write each filename in the output field. Is there any automatic process to get outputs with ...
1
vote
1answer
268 views
Difference in the elevations for the same building on two DSMs saved in *.asc and *.laz formats
The following question concern the same type of data as the one I've asked in Differences in the longitude and latitude between a LiDAR DSM and an optical image.
Basically, I've downloaded a tile of ...
10
votes
3answers
26k views
Converting LiDAR files from LAZ to LAS format
I'm trying to convert LiDAR files from the LAZ format (the compressed version) into LAS (the uncompressed version) using LASzip software.
However, I am not really sure how it works. I created a new ...
2
votes
1answer
460 views
Finding the origin in .laz file with LAStools
I obtained a .laz file, which I used lasinfo and las2txt to view the records.
Scale Factor X Y Z: 0.00100000000000 0.00100000000000 0.00100000000000
Offset X Y Z: 22717....
2
votes
2answers
621 views
Laz LiDAR files display extremely long thin line of points
I am having difficulty properly visualizing aerial LIDAR data from the csc.noaa.gov source.
Taking any of the .laz files, the point cloud displays as an extremely long thin line of points. Zoomed in, ...
