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Land Cover Classification System
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PRESENTATION FLOWPRESENTATION FLOW• Introduction• Steps of Pre-processing• Image Classification in MadCat• Quality Assurance of Data• Edge Matching• Topology Check• Final Quality Check• Layout Development• Results Validation through Field Survey
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INTRODUCTIONINTRODUCTION
Land Cover Mapping is an going project in collaboration
with FAO UN using the technique of Land Cover
Classification System (LCCS) – an important component
of FAO / GLCN approach to create a harmonized and
extensive representation of land cover features
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FINAL MOSAICS SCHEMA OF AOIFINAL MOSAICS SCHEMA OF AOI
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STEPS OF PRE-STEPS OF PRE-PROCESSINGPROCESSING
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KEY POINTSKEY POINTS• DATA USED
– SPOT 5 meter pan- sharpened data
• 2.5meter rescaled at 5 meter
• Development of Working areas– Working areas of whole
province developed with minimum overlap
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KEY POINTSKEY POINTS
• Creation of Subsets within working areas
Segmentation created separately on each subset
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SEGMENTATIONSEGMENTATION• Re-projected into world Mercator (WGS-1984) before
segmentation• Segmentation scale used 50 (± 15 depending upon the features on
image), shape = 0.1, compactness= 0.9)
polygons from outside the boundary were deleted
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Land Cover Classification Map – Hyderabad & Surroundings
Hyderabad
Indus River
.
Sindh
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QUALITY ASSURANCE OF DATAQUALITY ASSURANCE OF DATA
• Quality Checking – Marking of Errors
• Error Removing
• Re – QC
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GENERAL ERROR MARKINGGENERAL ERROR MARKING
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ERRORERROR REMOVINGREMOVING
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EDGE MATCHINGEDGE MATCHING
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TOPOLOGY CHECKTOPOLOGY CHECK
• Removal of Gaps
• Removal of Overlaps
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TOPOLOGY CHECKTOPOLOGY CHECK
1. Data was first checked for gap errors
2. Correction of gap errors
3. Then, overlap topology was checked
4. Overlap errors were corrected in MadCat
– Gap corrected layer was imported in segment layer
– Polygon containing errors were exported to training areas
– Then again move back to segment layer by using Topology over
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REMOVAL OF GAPSREMOVAL OF GAPS
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REMOVAL OF OVERLAPING REMOVAL OF OVERLAPING ERRORSERRORS
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The possible areas of application would be Agriculture, Forestry, Environment, Irrigation, Disasters & Hazards Monitoring, Planning & Development, Oil & Gas Exploration, Mining, Wild Life and other emergent requirements.
Land Cover Mapping
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RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY
ROUTE OF SURVEYROUTE OF SURVEY
SURVEY TEAMSURVEY TEAM
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RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY
WLBA
TCIr
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RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY
TCIr / SaD
SaD / WB
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RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY
SCIr
WB
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RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY
HCIrS
SaD
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SCIr – Shrubs Crop Irrigated TCIr – Trees Crop Irrigated
HCIr – Herbaceous Crop Irrigated HCRf - Herbaceous Crop Rainfed
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WLBA - Water Logged Bare Area WB – Water Bodies
SaFP – Desert Flat Plain BL – Barren Land
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Thank you