object-based land cover classification of torngat caribou habitat in
TRANSCRIPT
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Object-based Image Analysis for Disturbance and Habitat Land
Cover Mapping
Bahram Salehi, PhD, P.Eng
Remote Sensing Engineer at C-CORE/LOOKNorth Cross Appointed Professor at Engineering Faculty of
Memorial University of Newfoundland
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Outline
• A hybrid object-based and pixel-based image analysis technique for Oil/Gas-related disturbance extraction from LANDSAT data
• Geometric enhancement • Image segmentation • Well-site extraction • Results
• An object-based classification framework for and cover mapping of Torngat caribou habitat mapping in Labrador-Quebec.
• Image Pre-processing • Multi-resolution segmentation • Rule-based classification • Results
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Automatic and rapid Well-site extraction using Landsat data
Study Area: Fort McMurray, Alberta
• Landscape disturbances occur through natural (e.g. fire) and anthropogenic (e.g. seismic lines, well pads) influences.
• In order for resource development projects to be approved a minimum of 65% of the habitat in a species range must remain undisturbed.
• More than 500,000 Well sites only in Alberta SRD, 2010)
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Comparison of well site extracted from Landsat-5 TM acquired in May and July, 2011. More well sites are detected in the early season image.
The output of different steps involved in the developed well site extraction method.
Well-site extraction using LSAT data- Steps involved in the methodology
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Landsat 5 TM image, July 02, 2011 Fort McMurray
Well-site extraction using LSAT data- steps involved in the methodology
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Well-site extraction using LSAT data- Results of 3 regions of interest
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• Using 2 Landsat-5 TM images, Fort McMurray May 15, 2011 and July 5, 2015
• The Method is fully automatic and can process a full Landsat image (32400 sq km) in less than 10min: The entire Alberta in less than 4 hrs.
• More than 96% of Well pads have been extracted over the 4 ROI sites
• False Positive rate is about 20%
• Overall accuracy ~ 77%
Landsat-5 Shortwave Infrared-1, July 2011
Site TP FP FN Correctness Completeness Quality ROI_1 489 144 19 77.3% 96.3% 75% ROI_2 323 91 19 78.0% 94.4% 74.6% ROI_3 393 133 9 74.7% 97.8% 73.5% ROI_4 703 109 28 87.3% 96.2% 83.7% Total 1908 477 75 79.3% 96.2% 76.7%
TP: True Positive FP: False Positive FN: False Negative
7 Well-site extraction using LSAT data- Accuracy Assessment
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Torngat Caribou Habitat Classification: Project Area
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~ 20 SPOT-4 Images
Torngat Caribou Habitat Classification
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~ 20 SPOT-4 Images Mosaicked
Pan-Sharpened Bands (G, R, NIR, SWIR), 10 m Resolution
Torngat Caribou Habitat Classification
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DEM : 20 m horizontal resolution, Re-sampled to 10 m
Torngat Caribou Habitat Classification
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Object-based Classification
Torngat Caribou Habitat Classification
Data Collection and Pre-Processing
Normalization Mosaicking Pan-Sharpening
Multi-Resolution Segmentation Level-1 Level-2 Level-3
Object-based Hierarchical Classification
Rule-based Classification
Water Shadow
Maximum Likelihood
Support Vector Machine
Decision Trees
K Nearest Neighbour
Rock Bryoids Shrub Coniferous Snow/Ice
Multi-source Data
Segmentation
Classification
Thematic Map
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SPOT-4 Pansharp
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Segmentation_Level-1
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Segmentation_Level-2
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Segmentation_Level-3
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Brightness
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Standard Deviation_NIR
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GLCM-Texture-Homogeneity _NIR
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Classification_Black body
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Classification_Water/Shadow
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Classification_Water/Shadow/Conif./Shrub/Bryoids/Rock
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Project Team
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Object-based Image Analysis ü Shadow ü Water ü Coniferous ü Shrub ü Bryoids ü Rocks
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Thank You!