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Questions tagged [fusion]

Free software for LiDAR data processing and visualization. Do not use the "fusion" tag for Google Fusion Tables subjects. Instead, use "google-fusion-tables" tag.

0
votes
0answers
16 views

Filter fusion table data [on hold]

I need to filter a collection based on data in the fusion table. For instance, I need to filter MOD13Q1 collection based on the date which is situated in a fusion table as the start date and the end ...
2
votes
1answer
61 views

GridMetrics output does not align with base DTM?

I am trying to derive grid metrics from LiDAR (.las) file using FUSION's GridMetrics tool. My problem is that the output raster from GridMetrics does not align with the base DTM used to run the tool. ...
1
vote
1answer
317 views

Unable to install FUSION in QGIS 3.2?

I'm unable to install FUSION in QGIS 3.2 on Ubuntu 16.04. Andre Silva on Creating DEM from LAS file without using LAStools? says to use the same procedure as LAStools (up to QGIS 2.18 version). I've ...
2
votes
1answer
85 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
1answer
132 views

Setting GroundFilter parameters for low density point clouds?

I'd like to use the function GroundFilter on my dataset. However, the manual says that the default values of the parameters used by this function (g parameter, w parameter) are related to a high ...
1
vote
0answers
145 views

FUSION's PolyClipData creates corrupt LAS file?

I am trying to learn LASPY and am following a tutorial. I got an error when starting up using: import laspy infile = laspy.file.File("./laspytest/data/simple.las", mode="r") where I got a storage ...
1
vote
2answers
737 views

laspy ValueError: buffer size must be a multiple of element size

I am trying to learn LASPY and am running into road blocks off the bat. I first ran into and Error 8 (Not enough storage is available to process this command) using my full sized LAS file (1.7GB). I ...
1
vote
0answers
206 views

Performing spectral unmixing fusion? [closed]

How can I perform a spectral unmixing fusion ? The process consists on using a fraction image of a sensor "A" to obtain the reflectance image of a sensor "B", basically the inverse processes of ...
3
votes
1answer
248 views

Memory allocation error encountered when automating gridmetrics in R

I am trying to run Fusion's GridMetrics from R, I wrote this for one las file: #First set up directories to keep the raw data #separate from that produced by the analysis, Input (.las) and (.dtm), #...
1
vote
0answers
122 views

Generate LiDAR point cloud understory division through histogram and height threshold [closed]

This is somehow a good post that gives me a bit of direction; Retrieving LiDAR metrics from relative vertical layers of point cloud I'm using FUSION and rLIDAR most of the time. I'm looking for a way ...
5
votes
2answers
850 views

Retrieving LiDAR metrics from relative vertical layers of point cloud?

I need to obtain the proportion of all returns within 5 equally spaced height bins between the cutoff (1 meter) and the maximum height value. I need to get this proportion of all returns for 1000 ...
7
votes
2answers
587 views

LiDAR intensity image from multiple flight lines?

I'm working with multiple raw las tiles, and I've used Fusion to create an intensity image, but it shows the flight line overlap (see below). Any idea how can I smooth the image so that the overlap is ...
3
votes
1answer
839 views

Clip multiple .las files data to polygon shapefile using FUSION

I followed this thread in order to clip .las data based off of a polygon shapefile. However I have over 100 .las files I need to clip based off of this polygon and merged into a single .lasd file and ...
2
votes
1answer
671 views

Clipping LAS data with multiple shapefiles

I am looking for a method to clip with multiple shapefiles (139 shapefiles polygon) a lidar.las file. I'm using the software Fusion, as described in: How to clip LAS data using shapefile polygons ...
3
votes
1answer
1k views

How complete are the Fusion tools in QGIS?

How complete are the Fusion tools in QGIS? I have them installed and (vaguely) working, but there are only about ten of them. Is the idea of having just a few tools available, that one can use ...
4
votes
1answer
473 views

Extracting LiDAR metrics with TerraScan?

I want to extract from a las file statistics such as height percentiles (percentile 95, for example) among others. I can do it with Fusion (using Cloudmetrics and Gridmetrics tools), but I would like ...
1
vote
1answer
325 views

How to interpret Lidar scan line problems?

I am calculating various gridmetrics using the Lidar processing tools in FUSION. The dataset I am working with contains 154 flight lines of high density data, at a nominal pulse spacing (NPS) of 1.5 ...
1
vote
0answers
467 views

How to increase FUSION-LTK lidar processing productivity?

I am processing Lidar data with FUSION-LTK. My study area contains 5 blocks of 1000 las tiles per block. Each block is broken into approximately 4 subblocks of 250 las tiles. I am calculating grid ...
22
votes
6answers
16k views

What LiDAR processing tools are available in Python?

I have been using FUSION and the command line FUSION Lidar Toolkit (LTK) to process LiDAR data. A broad Google search ("Lidar Python") yielded libLAS and pyLAS as Python LiDAR libraries, however, ...
10
votes
7answers
8k views

Linux alternatives to visualize and analyze LiDAR datasets?

For a long time I have been using softwares based in Windows to visualize and analyze LiDAR data sets for forest application. Recently, I have started to move all my work to Ubuntu platform, but I'm ...