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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.

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USFS Fusion software bare-ground DTM input

I downloaded 1-m 3DEP dem from USGS to use as input for Fusion bare-earth DTM (description here) and I'm using USGS lidar data for the point cloud to make a Canopy Height Model. Due to data size ...
Jonathan Burton's user avatar
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1 answer
156 views

Run FUSION/LDV programs from Python

I have been working with FUSION/LDV: Software for LIDAR Data Analysis and Visualization for LAS data processing. Particularly I am using such commands as GridSurfaceCreate - to create a gridded ...
g123456k's user avatar
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2 votes
1 answer
570 views

Canopy Relief Ratio (Grid Metrics) FUSION/LDV

According to the paper cited below, CRR tells us about the shape of trees and is defined as: Canopy Relief-Ratio (CRR) is a quantitative descriptor of the relative shape of the canopy from altimetry ...
Arthur_Morgan's user avatar
1 vote
0 answers
23 views

FUSION LDV output to EPSG 32611

In FUSION the user can define the output coordinates, for example, in case of GridSurfaceCreate the user has the option to either set it to NAD27 (1) or NAD83 (2). My question is, does the latest ...
Arthur_Morgan's user avatar
1 vote
0 answers
196 views

Converting a huge .LAS into a readable 3D file

I've got a huge (1.3GB) .LAS file that is composed of data from around the Golden Gate Bridge in San Francisco. I'm trying to get it into Blender, a 3D software, so I can look at the surroundings and ...
Sameer Iyengar's user avatar
1 vote
0 answers
70 views

LAZ reprojection to UTM

In FUSION you can reproject the final output, for example in case of ASCII to DTM, one can use: ASCII2DTM canopy.dtm m m 1 10 2 2 canopy_southern.asc So my question is how can I reproject a LAZ file ...
Arthur_Morgan's user avatar
2 votes
0 answers
2k views

How does GeoTIFF file store elevation data? [closed]

I'm trying to understand how elevation data is stored in GeoTIFF files, when used for Digital Elevation/Surface Models. My very basic understanding is that in a GeoTIFF file (or at least those ...
Ben W's user avatar
  • 103
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1 answer
290 views

Why is the asc file associated with Fusion CanopyModel different from the GeoTiff I create?

I'm working in Python (using PyQGIS) to create a digital surface model from .las data. When I use fusion:canopymodel it creates a .dtm file, and a .asc file. I then convert the .dtm file to .tiff ...
Ben W's user avatar
  • 103
1 vote
1 answer
169 views

Integrating RGB image and nDSM data [closed]

How can I integrate RGB image and nDSM data provided in the dataset (ISPRS Vaihingen) that I want to use in a multimodal deep learning based semantic segmentation method? Can anybody provide a Python ...
Soumya Ghosal's user avatar
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50 views

FUSION Microsoft visual runtime library C++ blank error

I am trying to run the DTM script on 73 laz files (each file >500 MB) and a big single ground filter.laz file > 1 GB that has 303239327 points. The laz files ran just fine with the ground filter ...
Arthur_Morgan's user avatar
1 vote
1 answer
195 views

Error when running StarFM

I aim to make the fusion of Landsat and Modis using STARFM at USDA StarFM I tried to conduct this process in R, in which we call the software using this code: system2(command="./StarFM.exe",...
Sang Truong's user avatar
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695 views

R code for STARFM FUSION using preprocess data from Google Earth Engine

I would like to quickly fusion Landsat and Modis data. I found the code solution at https://github.com/MacGallagher/GEE_STARFM_FUSION However, when I tried to run the R code in geestarfm_workflow.R ...
Sang Truong's user avatar
2 votes
1 answer
225 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. ...
James Ch's user avatar
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1 vote
1 answer
2k 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 ...
JDB's user avatar
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2 votes
1 answer
447 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 ...
bird's user avatar
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4 votes
1 answer
305 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 ...
Melissa Latella's user avatar
1 vote
0 answers
314 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 ...
D_C's user avatar
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1 vote
2 answers
5k 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 ...
D_C's user avatar
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1 vote
0 answers
357 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 ...
MarujoRe's user avatar
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3 votes
1 answer
387 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), #...
Rodri's user avatar
  • 347
1 vote
0 answers
208 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 ...
Wan S's user avatar
  • 71
5 votes
2 answers
2k 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 ...
Rodri's user avatar
  • 347
7 votes
2 answers
991 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 ...
user56104's user avatar
3 votes
1 answer
1k 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 ...
cbunn's user avatar
  • 1,427
3 votes
1 answer
1k 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 ...
Wan S's user avatar
  • 71
3 votes
1 answer
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 ...
J Kelly's user avatar
  • 1,373
4 votes
1 answer
636 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 ...
jfaneca's user avatar
  • 371
1 vote
1 answer
591 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 ...
Aaron's user avatar
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2 votes
0 answers
663 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 ...
Aaron's user avatar
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27 votes
6 answers
40k 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, ...
Aaron's user avatar
  • 51.7k
13 votes
7 answers
17k 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 ...