Questions tagged [lidar]

LIDAR (Light Detection and Ranging or Laser Imaging, Detection and Ranging) is an active optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target.

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Calculate wall area from airborne LiDAR points

For a project at uni, I'm calculating several metrics of buildings from airborne LiDAR data. As is the nature of the data, there are little to no points of the walls of buildings. So my current ...
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Getting elevation heights from folder of thousands of shapefiles that apparently come from LiDAR?

I obtained a few folders purporting to come from LiDAR data taken of a U.S. county. The directories are set up like this. Data-folder - be_rasters -- 692500_725000 --- dblbnd.adf --- hdr.adf --- ...
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Adding RGB values from a .txt file to a .las file using laspy

I have a text file that has XYZ and RGB values in it. To convert it to .las format i use lfile = laspy.file.File(r"D:\las\tolas.las", mode='w',header=LasHeader(x_scale=0.01,y_scale=0.01,z_scale=0.01))...
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100 views

Change LIDAR classification of points inside polygons

I'm trying to create a pdal pipeline to adjust the classification values for all points inside polygons, but I can't seem to get it to work. The filters.range works correctly because the output file ...
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120 views

Convert EPSG:2263 LiDAR data to EPSG:4326 to use with FSX

I have LiDAR (las) input files in EPSG:2263 (NAD83, NY state plane, feet_US) aquired from https://gis.ny.gov/elevation/ and want to convert those file to EPSG:4326 (WGS84) for use in MS Flight ...
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134 views

Batch ENVI IDL PointCloudFeatureExtraction results in unprocessed areas [closed]

I have an IDL-ENVI code to batch PointCloudFeatureExtraction for lidar tiles across a large area, however, when run, the output results in lower areas of each tile as "unprocessed". So my question is ...
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84 views

LIDAR scans of the same location give very different values [closed]

In QGIS, I have a number of LIDAR scans of the same geographic location over a number of years. The actual values in the .asc files differ markedly (see image). Do the different value ranges for the ...
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417 views

Seeking browser viewer for las data? [duplicate]

I am currently preparing lots of las files for analysis and am wondering about the easiest way to share the results on my intranet. Are there any cool web application for displaying and navigating ...
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209 views

Seeking LiDAR data for Palawan (Philippines)?

Is there any public or private sources of LIDAR data for San Paul river in Palawan (Philippines)? Searching online has not lead me to any sources, and I am unsure how the commercial world of LIDAR ...
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521 views

Expression into the raster calculator to invert DEM

I've made a DEM from first pass LiDAR data which I want to invert and run watershed segmentation and basin delineation over in order to hopefully extract tree canopy outlines and heights - I'm newish ...
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41 views

ArcGIS 10.X - DEM raster creation - Point to Raster vs. Terrain to Raster tools [closed]

I have a bunch of LiDAR data that I need to make a raster DEM & DSM from. From what I can gather my options are use the Point to Raster tool directly on the Multipoint feature or make a terrain ...
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126 views

Loading LIDAR data to POSTGRES and use it with DJANGO [closed]

I have some project at the Faculty and I don't know from where to begin. I have point cloud data (LIDAR data) and I need to make the website with that data on it and with functions for some sort of ...
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673 views

Seeking open source alternative of Las Tools [duplicate]

I am finding any open source alternative of Las tools , i Google but i found las Utitly which is also not the Open source alternative But i want open source alternative of Las Tools,
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Seeking LiDAR Data for Romania?

I need LIDAR Data for realizing a urban hydrology study in Romania. Where can I get this data? In particular I seek free data for Cluj-Napoca as a PhD student.

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