Vegetation Mapping and Measurement using LiDAR - an Industry Survey by Toby Clewett

Vegetation Mapping
and Measurement
using LiDAR

an INDUSTRY SURVEY

Vegetation Mapping

Toby Clewett and Measurement
using LiDAR

Geospatial Analyst INDUSTRY SURVEY
by TOBY CLEWETT

Sunshine Coast
Captain Cook’s ‘Glasshouse Mountains’

Vegetation Mapping

Toby Clewett and Measurement
using LiDAR

Geospatial Analyst INDUSTRY SURVEY
by TOBY CLEWETT

Geographical Software
Information Systems Engineering
GIS

Remote
Sensing

Project Motivations Vegetation Mapping
and Measurement
using LiDAR
Project Survey LiDAR
Spatial Coordination
Method and Applications INDUSTRY SURVEY
Motivations Cognition in the Future
Response Diversity by TOBY CLEWETT

Project Motivations
• LiDAR Technology opportunities
• gain knowledge of industry Best Practice
• further my Structured Research and technical skills

Geospatial Revolution Vegetation Mapping
and Measurement
using LiDAR

LiDAR Success on the Sunshine Coast Vegetation Mapping
and Measurement
using LiDAR

- Detailed topographic
maps for intensely
vegetated environments
with a canopy height Vegetation Patch Mean Crown Height
thematic for ‘Emergent’
Trees

- Vegetation maps for the
Sunshine Coast
highlighting 14m
remnant, regrowth and
other patch types such as 22m
plantation forestry

- Regional Vegetation
Maps Patch Crown Height
6m
- Sippy Downs Riparian
Area

Point Clouds – a Rich Source of Information Vegetation Mapping
and Measurement
using LiDAR

LiDAR presents huge opportunity for
the environmental sciences
• Visualisation from two LiDAR data sources. Larger points are
laser strikes from an Aerial Laser Survey (ALS), whilst the
finer points are from a Terrestrial Laser Survey (TLS).

300 Billion Points Across Queensland? Vegetation Mapping
and Measurement
using LiDAR

Industry Best Practice Vegetation Mapping
and Measurement
using LiDAR

Gain knowledge of industry
Best Practice

Structured Research Vegetation Mapping
and Measurement
using LiDAR

Structured Research - Spatial Sciences Thesis

How do we best inform vegetation Professor Stuart Phinn
Director, Centre for Spatial
management at local to regional Environmental Research (CSER)
scales using LiDAR derived
biophysical characteristics?

Dr Tiffany Morrison
Senior Lecturer in
Environmental Planning

Survey Method and Response Vegetation Mapping
and Measurement
using LiDAR

Survey Method and Response
‘Snowball’ or ‘Chain-Referal’
Sampling
survey of United States Landsat users:

The population of Landsat users in the U.S. can
be characterized as "unknown" because there
is no list that contains contact information for
every user in the U.S. from which to sample.

Email Based

and Measurement
using LiDAR

Survey Response by Location

South-east Australia Pacific Rim
Queensland

and Measurement
using LiDAR

57% Response Rate
157 Completed Surveys

and Measurement
using LiDAR

ABS Standard Professions
Maybe 10,000 professionals within South-east Queensland
(population 3 million) i.e. 0.3%

and Measurement
using LiDAR

Web-Based Survey
Numerous examples across a
broad range of areas

1) Respondent Backgrounds

2) LiDAR derived vegetation
mapping information

3) Barriers and Additional
Issues

and Measurement
using LiDAR

Twenty-Four Maps
Height, FPC, Aggregated LiDAR Heights

and Measurement
using LiDAR

Seven Minutes of GIS Video
Animation

http://www.youtube.com/user/tobyclewett

Spatial Cognition Vegetation Mapping
and Measurement
using LiDAR

Spatial Cognition

and Measurement
using LiDAR
How easy is it to
Motivations Response
Cognition
Diversity
in the Future
by TOBY CLEWETT
look at the
colours in this
map and
determine the
height of objects?

9
7

83

Clear (83%)
Not Clear (7%)
Unsure (9%)

and Measurement
using LiDAR

and Measurement
using LiDAR

Mapping Scale Frequency

Parcel Street Suburb Regional National
1:1,000 1:5,000 1:50,000 1:100,000 1:500,000

and Measurement
using LiDAR

Question: at what Scale do you most often use Maps?
“I most often•use parcel scale the most used (32%) mapping scale
Parcel Scale was
mapping. The scales I would use
after that would be Spread with street (26%) Suburb Scale, and so on..”
• Even Street Scale, then and suburb scales (23%)

LiDAR Applications Diversity Vegetation Mapping
and Measurement
using LiDAR

‘Vegetated Polygon
Respondents chose
Extents’ a list the
from was of
A Two Thirds Majority
vegetation related
most useful
put ‘Leaf Area Index’
biophysical
as less, Even Spreaduseful
the least or not of
characteristics.
‘Foliage
indicates the
Projectiveof uses
diversity Cover’
But…11% thought is
and
for LiDAR data
was ‘Most Useful’!
Theyin ‘Height’ from
rated them
vegetation
were the??? andtord
‘most useful’ 3
2nd
management
‘least useful
most useful’

Selection was optional

and Measurement
using LiDAR

LiDAR Applications Diversity
• regrowth or remnant vegetation status, age, bio-condition, or
structure, optimising and planning field work
• wildfire behaviour, prescribed burns, fuel loads and property buffers
• land-cover classification, the built form, street trees, shade, suburban
footpaths and recreation, urban vegetation corridors and heat island
effects
• flood modelling, riparian condition, status and structure
• road corridor design

and Measurement
using LiDAR

Four Questions – Height, FPC, Software, Scaled
e.g. …Would using Vegetation Height Mapping at a street scale
(1:2,000), increase the efficiency, quality or consistency of your work? Briefly
describe why/how in the text box below.

• Very Likely

• Likely

• Unsure

• Unlikely

• Very Unlikely
71% Likely or Very Likely

Coordination in the Future Vegetation Mapping
and Measurement
using LiDAR

100
90
80
Barriers Feedback on this
question was very
70 strong, with 87% of
60
50 40 39 respondents describing
40 31
21
barriers that may exist
30
20 11 to effectively utilise
10 LiDAR derived
0 maps, mapping
products or GIS
analyses in their work

and Measurement
using LiDAR

Barriers
Knowledge
Systems
Cost

“Time to barrier. When LIDAR data is purchased, or
“In terms of utilising LiDAR derived Computing power.”
“Cost is ado so - do the processing. maps for the purpose of
riparian the full range of analysis a knowledge/resource
licensed,modelling, there is a bit ofproducts are seldom gap
“Appropriate by the project that necessary it. Often it from
on how to extract and utilise the purchased informationis
budgeted for hardware to manage large volumes of data”
LiDAR to provide for another project to require a different
necessary to waitvaluable inputs into other environmental
models.”
product before the money can be found. This approach
ultimately wastes both time and money.”

and Measurement
using LiDAR

#%@*!

Key Issues
Quality
Limitations
Accuracy
“Data quality (i.e. accuracy analysis of products).
“Assessment of limitations Assessment of accuracy and confidence level of
“Accuracy of the LiDAR; Field calibration/validation; LiDAR
information (i.e. especially considering derivative information)” is able
Comparison between different sensors topurposedata
capture specifications and sensor type; ensure of the
tomapping; available skills; data licensing”
be compared.”

and Measurement
using LiDAR

Vegetation Mapping and Measurement using LiDAR - an Industry Survey by Toby Clewett

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