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Working Smart with Point Cloud BIG Data
Demetrio P. Zourarakis, PhD, GISP(GISCI), CMS-GIS/LIS(ASPRS), CMS-RS(ASPRS)
GIS and Remote Sensing Analyst, [email protected]
502-564-6246http://gis.ky.gov
KAMM ANNUAL CONFERENCEWednesday August 24th, 2016
Kentucky Dam Village State Resort ParkGilbertsville KY
Justification• Sensors proliferate!
– Laser altimetry/elevation (LiDAR)• Linear scanner: THIS PRESENTATION• Geiger Mode, photon counting, flash LiDAR, etc.
• Platforms proliferate!– Aerial
• Fixed wing• UAV/sUAS >>>>> THEIR OWN LAS, NON-LiDAR files...
– Satellite
• Software proliferates!– Commercial-Off-The-Shelf (COTS)– Open Source
• Standards proliferate!– LAS formats 1.1, 1.2, 1.4 and counting...– USGS’s QL for 3DEP
• Applications proliferate!– “Traditional” ones– New ones
Outline
• DATA (examples)
• TOOLS (examples)
• PRELIMINARY RESULTS (examples)
• CONCLUSIONS
Open Source Data• Clark County (KY) GIS:
http://www.ccgisonline.com/#!lidar/ci0q
Open Source Data• Clark County (KY) GIS:
http://www.ccgisonline.com/#!lidar/ci0q
• Open Topography: http://www.opentopography.org/
Open Source Data (cont.)
Open Source Data (cont.)• US Interagency Elevation Inventory:
https://coast.noaa.gov/inventory/
Open Source Data (cont.)• USGS Earth Explorer:
https://earthexplorer.usgs.gov/
Open Source Data (cont.)• USGS Earth Explorer:
https://earthexplorer.usgs.gov/
Kentucky from Above!
The Kentucky Aerial Photography &
Elevation Data Program
(KYAPED)
• Acquires current leaf-off color aerial photography for the entire
Commonwealth
• Acquires current elevation data for the entire Commonwealth
• Partners with entities at all levels of government (economies of
scale)
• Distributes data to state agencies and in the public domain
• Utilizes Kentucky-based firms for acquisition and control work
What is KY From Above?
A Program that . . .
KY From Above Program Status
• 2012 – “Golden Triangle”
• 2013 – “Purchase”
• 2014 – “Western Kentucky”
• 2015 – “Central Kentucky”
• 2016 – “South Central Kentucky”
Data is available for download or via service for all acquisition
periods through 2016. Data acquired in 2016 should be available
before the end of the calendar year.
Elevation Data Status
Elevation Data Status
2017 LiDAR Acquisition Plan
Aerial Photography Status
http://kyraster.ky.gov/arcgis/rest/services/ElevationServices
Questions?
Kent Anness
Division of Geographic Information (DGI)
Website: http://kygeonet.ky.gov/kyfromabove/
• Idaho LiDAR Consortium:
https://www.idaholidar.org/free-lidar-tools/
Open Source Software
• Idaho LiDAR Consortium:
https://www.idaholidar.org/free-lidar-tools/
Open Source Software (cont.)
• RapidLasso Tools for QGIS: https://rapidlasso.com/2013/09/30/rapidlasso-adds-lastools-toolbox-to-qgis/
Open Source Software (cont.)
• RapidLasso Tools for ArcGIS (pipelines)https://rapidlasso.com/2014/04/03/new-lastools-production-and-lastools-pipelines-for-arcgis/
Open Source Software (cont.)
• Esri Tools – LAS Optimizer/Compressor (version 1.2.3):https://www.arcgis.com/home/item.html?id=787794cdbd384261bc9bf99a860a374f
Open Source Software (cont.)
Commercial-Off-The-Shelf• LP360 (GeoQue): http://qcoherent.com/
– Viewer– Basic/Advanced
• ArcGIS for Desktop: http://esri.com– 3D Analyst – Spatial Analyst
*** LAS Dataset*** zLAS (Optimized LAS)*** Point to TIN/Raster Conversion Tools
• Others– Terrasolid– Bentley– AutoCAD– ERDAS Imagine– ENVI– etc. etc. etc.
Intensity Image (1st Return – All Classes)
Quality vs. (&!) Quantity
KYAPED Elevation Data Status
3DEP >> QL
https://pubs.usgs.gov/tm/11b4/pdf/tm11-B4.pdf
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
0.00 0.50 1.00 1.50 2.00 2.50
UN
CLA
SSIF
IED
(b
illio
ns
of
po
ints
)
GROUND + MODEL KEY (billions of points)
KYAPED LiDAR Point Class and 3DEP Quality Level
QL1
QL2
QL3
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0 50,000 100,000 150,000 200,000 250,000 300,000 350,000 400,000 450,000
NO
MIN
AL
PO
INT
SPA
CIN
G (
m)
WEIGHTED CANOPY CLOSURE (Acres)
KYAPED LiDAR NPS and 2011 NLCD Canopy Closure (Weighted)
QL1
QL2
QL3
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
0 50,000 100,000 150,000 200,000 250,000 300,000 350,000 400,000 450,000
PER
CEN
T U
NC
LASS
IFIE
D P
OIN
TS
WEIGHTED CANOPY CLOSURE (Acres)
KYAPED LiDAR Unclassified Points and 2011 NLCD Canopy Closure (Weighted)
QL1
QL2
QL3
Conclusions
• Abundant sources and tools
(Some are free! Some are good!)
• KYAPED program seeks completion!
(with everyone’s help)
• Understanding Data Structure= one challenge
• Assessing Quality in Quantity: A Changing Landscape (Standards and Data)= another challenge
• Data Mining= an opportunity!
