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

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9
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4answers
149 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 ...
0
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1answer
25 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
27 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
votes
1answer
103 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
82 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 ...
6
votes
3answers
501 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
176 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 ...
0
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0answers
12 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
votes
1answer
246 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
54 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
110 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
votes
1answer
37 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 ...
0
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0answers
20 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 ...
5
votes
1answer
265 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 ...
0
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0answers
89 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. ...
1
vote
0answers
51 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
73 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
votes
1answer
57 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
votes
1answer
742 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, ...