A point cloud is an unstructured set of points, each defined by x,y,z co-ordinates.

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Assigning class codes for LAS files? [duplicate]

I have LAS files with code 0 - never classified. I have no other classes other than this. How do I assign class codes for my LAS file?
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0answers
23 views

How to generate DTM from LiDAR point cloud data? [duplicate]

I have LiDAR point cloud data (X Y Z Intensity), and I want to generate DTM (only ground point). Is there any solution (algorithm or software)?
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0answers
13 views

Intersect raster or laz (pointcloud) with vector polygons

I am a vector trained GIS person and wish to add the value of a pointcloud to my vector data. A friend of mine suggested cloudcompare but said it was also possible using my beloved QGIS. I work with ...
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1answer
24 views

How to generate DTM from point cloud data? [duplicate]

I have point cloud data obtained from drone. I need to generate DTM out of it. How can I generate and I checked options in ArcGIS and QGIS. I was not able to find any.Could anyone suggest a method to ...
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0answers
36 views

Matching drone point cloud data with original lidar survey? [duplicate]

I have point cloud data collected from a drone of a particular area. I too have the point cloud data collected from the lidar survey. Both are georeferenced. Now, I need to match the point cloud data ...
9
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4answers
178 views

Creating photogrametric point cloud of an object from distributed photographs, here: Making accurate 3D model of building using UAV imagery?

Is there a way of creating a photogrametric point cloud from a set of densly distributed photographs of an object? Application: I am trying to investigate if creating a 3D model (point cloud) of the ...
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1answer
26 views

Can targets placed on the facades of a building be used to increase the accuracy of a point cloud of a building generated from Drone/UAV/UAS imagery?

Can targets (used for registering point clouds) mounted on a building be used to increase the accuracy of a point cloud generated from UAV imagery?
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0answers
31 views

Flipped (Y-axis) Raster from point cloud

I have been working on a project where I need to create rasters from irregularly spaced point clouds. I am resampling my point clouds to a regular 0.25 cm grid using a nearest neighbor method ...
2
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1answer
125 views

Measuring volume using DSM instead of point clouds in Pix4D

I've go a point cloud generated in the Pix4D software from about 90 aerial images. I am trying to measure piles of coal and have found that using the volume measuring tool on the point cloud model ...
1
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2answers
92 views

PDAL: Couldn't create filter stage of type 'filters.voxelgrid'

I have the following PDAL pipeline: <?xml version="1.0" encoding="UTF-8" standalone="no"?> <Pipeline version="1.0"> <Writer type="writers.pgpointcloud"> <Option name="...
7
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3answers
579 views

Thinning large LiDAR point cloud?

I have a large point cloud (LAS file) and I am trying to thin this using a complex technique. I know it is possible to thin a point cloud using simple techniques such as extracting every nth point. ...
2
votes
1answer
210 views

Viewing point clouds in bpf format?

Is there any software that can be used to view point clouds in bpf format? My preference is for free software that has low-learning curve for quick visualizations. Currently, I convert bpf to las ...
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0answers
13 views

3ds city model to Digital Surface Model

I've got building and terrain models of a city in 3DS format. I'd like to transform these models to tiff images in order to create some kind of digital surface model (pixel value = height or altitude) ...
5
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1answer
300 views

GeoReference XYZ point cloud

I am looking for help. I have done a little bit of geo-registration of images with QGIS. But now, I have been handed some LIDAR data in PCD format (basically x,y,z), But it is not geo-referenced. I ...
0
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0answers
61 views

Generating DEM from point cloud and DEM differencing?

I have two point clouds obtained via structure from motion (ground photos of sand-dunes + Visual SfM/Agisoft Photoscan). If I wanted to generate a DEM from these point clouds and difference them to ...
1
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0answers
124 views

Help with PDAL install on windows [closed]

I am trying to install PDAL from github according to the following instructions: Clone into a source directory: git clone https://github.com/PDAL/PDAL PDAL Make a build directory: mkdir PDAL-build ...
0
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1answer
42 views

PDAL removes color attribute from point cloud

I am trying pdal to perform a ground filtering on a point cloud (las file) with colors. I use the pcl option and this tutorial Identifying ground returns using ProgressiveMorphologicalFilter ...
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0answers
21 views

removing point cloud data from PostGIS

I'm ingesting dozens of LAS files into one table in PostGIS using PDAL using the example from pdal.io: <?xml version="1.0" encoding="utf-8"?> <Pipeline version="1.0"> <Writer type="...
5
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1answer
266 views

Why aren't there LiDAR records in some black and white parts of the scene?

This is the actual scene: This is the corresponding LiDAR scene: The LiDAR data is from xyz file. The questions are: Why are there no points for the dark squares on the checkerboard as well ...
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0answers
99 views

How to convert a ascii formatted colored point cloud to hdf5 file format?

I would like to make a point cloud viewer for hdf5 formatted point cloud. Because massive point cloud data can not be displayed by general point cloud viewers. I often use massive point cloud data. ...
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0answers
52 views

Getting points from a particular section of point cloud data [closed]

I have a las file and I'm trying to analyze it using ArcGIS/ArcPy. Are there any built-in functions that I can use (maybe using a tool or las data property) to isolate a chunk of points? I want to be ...
0
votes
1answer
76 views

ArcGIS Raster To Multipoint Mac/OSX alternative

Is there an alternative to the ArcGIS Raster To Multipoint tool for Macs? The VIP thinning method is particularly of use. A comparative point cloud thinning/simplification tool to this would just as ...
0
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1answer
58 views

Point Cloud footprint/wireframe layer - PostGIS

I'm using PDAL to import LAS files into PostGIS. The tutorial provided by boundless is great, and shows how to display the data in patches, but it doesn't cover displaying the table 'footprint'. I ...
2
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1answer
813 views

Open-source reader of Leica C10 terrestrial LiDAR proprietary file format

I have a Leica C10 terrestrial LiDAR (laser scanner) system. The system creates and stores point cloud data in a proprietary .bin file. Currently I have to use Leica's proprietary LiDAR software, ...