GatorEye Post-processing Information and Links
https://cran.r-project.org/web/packages/rlas/rlas.pdf
https://cran.r-project.org/web/packages/ForestTools/index.html
https://www.rdocumentation.org/packages/uavRst/versions/0.5-2
http://blue.for.msu.edu/EA14/exercises/exercise-spLM/initial-exploration-spLM.pdf
http://adam-erickson.github.io/gapfraction/
https://github.com/adam-erickson/gapfraction/blob/master/R/sun.path.R
http://wiki.awf.forst.uni-goettingen.de/wiki/index.php/Canopy_Height_Model_based_on_Airborne_Laserscanning_using_LAStools
https://www.lutraconsulting.co.uk/blog/2015/04/15/filter-lidar-in-grass/
https://geospatial.ncsu.edu/osgeorel/pubpdf/vpetras_grass_gis_loves_lidar.pdf
https://grass.osgeo.org/grass72/manuals/v.in.lidar.html
https://cran.r-project.org/web/packages/rLiDAR/rLiDAR.pdf
https://cran.r-project.org/web/packages/MBA/MBA.pdf
http://quantitativeecology.org/using-rlidar-and-fusion-to-delineate-individual-trees-through-canopy-height-model-segmentation/
https://www.spiedigitallibrary.org/journals/Journal-of-Applied-Remote-Sensing/volume-8/issue-1/083573/Performance-analysis-of-freeware-filtering-algorithms-for-determining-ground-surface/10.1117/1.JRS.8.083573.short?SSO=1
http://www.spdlib.org/doku.php?id=spdlib:general:faq:faq
http://www.spdlib.org/doku.php
http://www.mdpi.com/1999-4907/7/12/307/pdf
http://lidarwidgets.com/
https://forest.moscowfsl.wsu.edu/lidar/
http://dominoc925.blogspot.com/2010/11/auto-classifying-lidar-points-as-ground.html?m=1
http://www.mdpi.com/2072-4292/3/3/638/pdf
http://lbi-archpro.org/als-filtering/lbi-project/results/laserdata/filtering-algorithm-3
https://www.osapublishing.org/ao/abstract.cfm?uri=ao-56-34-9359
https://www.fs.fed.us/eng/rsac/lidar_training/pdf/10032-MAN1.pdf
https://gis.stackexchange.com/questions/101786/determining-bare-earth-dem-from-unclassified-las-file/108342#108342
https://gis.stackexchange.com/questions/101786/determining-bare-earth-dem-from-unclassified-las-file/108342#108342
1. Grass, using V MCc Lidar add-on
https://grasswiki.osgeo.org/wiki/Processing_lidar_and_UAV_point_clouds_in_GRASS_GIS_(workshop_at_FOSS4G_Boston_2017)#Classify_ground_and_non-ground_points
v.lidar.mcc - https://grass.osgeo.org/grass72/manuals/addons/v.lidar.mcc.html
v.surf.rst - interpolate in GRASS extension (addon?)
Notes: seems the best, as it does MCC which is highlighted among all packages as being the best results (and they implement), and then provides spline interpolation, versus grid like many others and which presents issues for large gaps of no ground point areas.
2. Fusion
One of the best integrated freeware opensource packages available. However, algorithsm for interpolation are not ideal, and MCC is shown to be slightly superior for classification.
3. LiDR package – analysis for forestry applications!
https://github.com/Jean-Romain/lidR
https://www.rdocumentation.org/packages/lidR/versions/1.2.1
Notes: does not classify ground points, need to use https://github.com/Jean-Romain/lidR/blob/master/R/lasground.r, from LiDRextra to do that
https://rdrr.io/cran/lidR/man/LAD.html
Notes: may have been updated to include las ground which does the classification now
https://rdrr.io/cran/lidR/src/R/lasground.r
using a progressive morthological filter
Can interpolate https://rdrr.io/cran/lidR/src/R/grid_terrain.r using this code, but seems to not model shape!, just average values using various complex equations, so would be flat across an open space (not shaped like side of hill or dip / rise. So , sub-optimal.
4. LiDRextra – R package
May be merged now into the LiDR package above
LASTools
LASGround exe
Notes: licensing is cost prohibitive over long-term
BCLA
IDL Extensions for ENVI and IDL
Many tools available
RLiDAR package
https://www.rdocumentation.org/packages/rLiDAR/versions/0.1.1
Mostly for working with CHM to identify trees and get stats
Leaf Area Density calculation R packages:
https://rdrr.io/a/github/akamoske/LiDARforestR/
https://cran.r-project.org/web/packages/leafR/index.html
leafR package is (basically) the same as the LiDARforestR package which does the same thing but is much slower.
QT Modeller (viewer and pro)
Global Mapper LiDAR
ENVI LiDAR
MCC-lidar
Has independent exe file to call, or can implement via GRASS add-on
PLOS ++ ?
LIP something ?
LIS 3D Pro
ESRI Spatial Analyst
TopoDOT ‘extract bare earth model’
LiDAR Analyst (Textron for ESRI) – requires spatial analst
libLAS
SPDLib general
https://bitbucket.org/petebunting/spdlib
http://www.spdlib.org/doku.php
SPDLib MCC
multi-scale curvature algorithm, implemente din SPDLib
https://spectraldifferences.wordpress.com/2014/08/06/dem-spdlib/
SPDLib PML
progressive morphology filter [1]. This is available through the command spdpmfgrd.
PDAL - https://gis.stackexchange.com/questions/101786/determining-bare-earth-dem-from-unclassified-las-file/108342#108342
DTM interpolation from classified points
Matlab code from 2017 paper
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5415094/
MARS - http://www.merrick.com/servicelines/gis/mars.aspx
Surfer – interpolation only,
Options for DTM above
Overview websites
https://www.idaholidar.org/tools/mcc-lidar/
Overview of methods and applications
https://www.fs.fed.us/eng/rsac/lidar_training/Intro_to_lidar_modeling_withR/story.html
Overall Notes
QGIS has no way to work with LiDAR directly, but you can install lastools there if you want
Terrestrial LiDAR
https://www.idaholidar.org/tools/liforest-lidar-software-for-forestry-applications/
http://greenvalleyintl.com/
http://www.3dforest.eu/
TreeLAS R package (developed by Thiago)
Tree crown segmentation and parameters
LIDAR360 Forestry Module - https://greenvalleyintl.com/software/lidar360/
https://cran.r-project.org/web/packages/ForestTools/vignettes/treetopAnalysis.html
https://cran.r-project.org/web/packages/itcSegment/itcSegment.pdf
https://carlosasilva.shinyapps.io/LiDARTreeTop/
rLiDAR package has some options
eCognition using CHM (or LAS conversion)
