lesto - a gis toolbox for lidar empowered sciences
DESCRIPTION
My presentation given about the work done at the University of Bolzano on LESTO, the upcoming GIS toolbox for LiDAR based sciences, currently focused on forestry analyses.TRANSCRIPT
1Bozen-Bolzano
Free University of
/21
A GIS BASED TOOLBOX FOR FORESTRY ANALYSISCOMPARISON OF METHODOLOGIES
Andrea Antonello, Alessandro Andriolo, Floreancig Valentino, Franceschi Silvia,
Comiti Francesco, Tonon Giustino
LESTOLiDAR Empowered Sciences Toolbox Opensource
2013-09-17 IX Congresso Nazionale SISEF - BolzanoLibera Universita' di Bolzano
2Bozen-Bolzano
Free University of
/21 The research needsFORLIDAR, Estimation of Alpine forests structure and biomass
and their potential role in increasing flood hazards by using
LiDAR data
FusionLastools
Bibliographic research
Field data on 15 plots
Dedicated LiDAR flight
3Bozen-Bolzano
Free University of
/21 The research needsFORLIDAR, Estimation of Alpine forests structure and biomass
and their potential role in increasing flood hazards by using
LiDAR data
FusionLastools
Bibliographic research
Field data on 15 plots
Dedicated LiDAR flight
development of
dedicated tools
4Bozen-Bolzano
Free University of
/21 Modules overview
RasterTops extraction
Local Maxima
Crown extraction
Popescu
Region growing
Watershed
Pointcloud
Tops extraction
Local maxima
Crown extraction
Segmentation
Gener
al
las re
ading
/writ
ing
las sp
atial
inde
norm
aliza
tion
filter
s
morph
ers
Derive
d
CHM ex
tracti
on /
DSM
Axell
son - a
dapt
ive tin
Las t
o ra
ster i
nter
p. (e
x. ID
W)
Las t
riang
ulatio
n
5Bozen-Bolzano
Free University of
/21 Las data indexing
Las reading/writing/indexing
6GB of data
6Bozen-Bolzano
Free University of
/21
Las reading/writing/indexingmain spatialindex on files
6GB of data
use of a unique spatially indexed file
per file dataspatial index
*.las *.las *.las
Las data indexing
6GB of data
7Bozen-Bolzano
Free University of
/21 Las data indexing
use a shapefile to access any point cloud data in a folder of las data
8Bozen-Bolzano
Free University of
/21 Las data indexing
9Bozen-Bolzano
Free University of
/21 Las data indexing
h [m]
coun
t
lowercanopylayer
highercanopylayer
Vertical extraction: height distribution
10Bozen-Bolzano
Free University of
/21 Raster Tops/Crowns extraction
- normalization of data (DSM-DTM)- inverting (watershed)- thresholding- gaussian (or similar) smoothing- production of a custom DTM (Adaptive tin)- use of morphing techniques
Data preprocessing modules
11Bozen-Bolzano
Free University of
/21 Raster Tops/Crowns extraction
Tops extraction modules- local maxima- circular or square window- fixed window or height dependent window (Popescu)- morphing and normalization
12Bozen-Bolzano
Free University of
/21 Raster Tops/Crowns extraction
Crown extraction modules- Popescu circles (based on height)- Watershed (Soile)- Region growing
13Bozen-Bolzano
Free University of
/21 Pointcloud extraction
Tree segmentationSingle tree approach, extraction of points for each tree
A
B dummyC
D
dmin1 dmin2
#1 #2
A
B dummyC
D
dmin1 dmin2
#1 #2
dt (r)
A New Method for Segmenting Individual Trees from the Lidar Point CloudWenkai Li, Qinghua Guo, Marek K. Jakubowski and Maggi Kelly
14Bozen-Bolzano
Free University of
/21 Pointcloud extraction
Tree segmentationSingle tree approach, extraction of points for each tree
15Bozen-Bolzano
Free University of
/21 Pointcloud extraction
Tree segmentationSingle tree approach, extraction of points for each tree
16Bozen-Bolzano
Free University of
/21 What is LESTO?- Open Source
- GIS aware
- library dedicated to
- sciences that make use of
- LiDAR data
LESTOLiDAR Empowered Sciences Toolbox Opensource
Maintained by the team of prof. Tonon
at the Faculty of Science and Technology
at the Free University of Bolzano.
17Bozen-Bolzano
Free University of
/21 LESTO's "User Interface"
LESTOLiDAR Empowered Sciences Toolbox Opensource
uDigopen source desktop GIS
Spatial Toolbox of uDiguserfriendly toolbox for processing libraries
18Bozen-Bolzano
Free University of
/21 Handle heavy processing
Geographic scriptingLeave the computer there to work for you
19Bozen-Bolzano
Free University of
/21 Future plans
- -
the first tools in the toolbox are forestry relatedand particularly dedicated to a single tree approach to calculate the forest structure biomassthe toolbox is open to contributions on any LiDAR related(future might even bring roads or buildings extraction)
- -
(...depending on the results on the validations in progress...)
stabilization and release of the current modulesdata quality analysis (i.e. which data quantity/quality is necessary to gain certain results?)
future developments will bring:
20Bozen-Bolzano
Free University of
/21 Open and shared approach
LESTO will be released under Open Source License(GPL v3) on the JGrasstools website after the first round of deep testing+fixing.
The open science approach is a natural choice for ourteam and we think it is in general for a university department.
Our thoughts reflect the "think global, fix local"approach, and even if the tools are released globally,they are meant in first place to be used by our professionals and local administration on the territory.
21Bozen-Bolzano
Free University of
/21
Useful links:
LESTOLiDAR Empowered Sciences Toolbox Opensource
http://www.jgrasstools.orghttp://www.udig.eu