Urban Monitor Update · •Urban environments are highly dynamic and need monitoring •Satellite...
Transcript of Urban Monitor Update · •Urban environments are highly dynamic and need monitoring •Satellite...
Urban Monitor Update including recent high resolution vegetation masks and relative elevation maps
CSIRO MATHEMATICS, INFORMATICS AND STATISTICS
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Kassel Hingee| Graduate Fellow
8th November 2012
• Urban Monitor History
• Recent Accomplishments • Vegetation/non-vegetation classification
• Vegetation Heights
• More Products
• Processed both 2007 and 2009
• AND we delivered them to DEC
• Can Land Monitor Benefit?
Urban Monitor Update | Kassel Hingee
Contents
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• Urban environments are highly dynamic and need monitoring
• Satellite resolutions are insufficient for complex urban/peri-urban scenes
• High resolution aerial photography is already collected at least annually for large cities, and fairly regularly in most other areas (adding a monitoring process is an economical opportunity wherever
photography is regularly gathered)
Because we want a quantitative monitoring system (more than humans
viewing images):
• New methods for the higher resolutions
• New methods for dealing with the variations in aerial photography
Urban Monitor Update | Kassel Hingee
Urban Monitor History Inception
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• Acquired every summer since 2007
• 9600km2
• Raw:
13TB to 40TB per annum
• Less than 0.3m GSD
• 4 bands: Near-infrared, Red, Green and Blue
Urban Monitor Update | Kassel Hingee
Urban Monitor History The Raw Data
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• 2.5 dimensional
• Used to orthorectify spectral data
• 0.2m GSD
• Storage: 1.3TB per annum
Urban Monitor Update | Kassel Hingee
Urban Monitor History Digital Surface Models
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• Calibrated to ground reflectance
• Consistent spectral values
• -> Classifications using spectral values
Urban Monitor Update | Kassel Hingee
Urban Monitor History Calibrated Orthophotos
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Uncalibrated Calibrated
Urban Monitor Update | Kassel Hingee
Urban Monitor History Qualitative Change Comparisons
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2009
2007
2007 vigour index in red 2009 vigour index in green
Recent Accomplishments
Urban Monitor Update | Kassel Hingee
Recent Accomplishments
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Photos from
aeroplane DSM
Ground
Elevation Model
Calibrated Multispectral
Images
Heights
of Pixels (nDSM)
Vegetation/non-veg
Classification
Vegetation
Heights
Vegetation
Vigour
Grass/non-grass
Classification
Tree/non-tree Classification
• Split region into tiles (easier to store, transport and open)
• 73 tiles, 13km by 15km each
• 0.2m GSD
• Both 2007 and 2009 processed
• Delivered all of it to DEC (about 20TB)
Urban Monitor Update | Kassel Hingee
Recent Accomplishments
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Digital Surface Model
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Ground Elevation Model
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Heights above ground (nDSM)
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Calibrated Orthophoto
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Vegetation/non-vegetation classification (nDSM displayed behind)
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Vegetation height (nDSM displayed behind)
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Vegetation vigour (nDSM displayed behind)
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Irrigated Grass Mask (nDSM displayed behind)
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Urban Monitor Update | Kassel Hingee
Recent Accomplishments Tree Mask (nDSM displayed behind)
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Whats Next
• Accuracy analysis
• Change maps
• Statistical summaries
• Multiclass classifications
• Shadow mask
• Water mask
Urban Monitor Update | Kassel Hingee 20 |
How Land Monitor Can Benefit
• High resolution aerial photography is being acquired by the state.
• Urban Monitor methods will easily transfer to 50cm resolution
• At 50 cm GSD: 1 tile ≈ 1:25 000 map sheet
• Quick, computer generated vegetation extents and vegetation heights.
• Much higher resolution ground elevations and vegetation masks
Urban Monitor Update | Kassel Hingee 21 |
CMIS Kassel Hingee Graduate Fellow
t (08) 9333 6010 e [email protected]
CSIRO MATHEMATICS INFORMATICS AND STATISTICS
Thank you