Land Cover Classification System

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

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

FINAL MOSAICS SCHEMA OF AOIFINAL MOSAICS SCHEMA OF AOI

STEPS OF PRE-STEPS OF PRE-PROCESSINGPROCESSING

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

KEY POINTSKEY POINTS

• Creation of Subsets within working areas

Segmentation created separately on each subset

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

Land Cover Classification Map – Hyderabad & Surroundings

Hyderabad

Indus River

.

Sindh

QUALITY ASSURANCE OF DATAQUALITY ASSURANCE OF DATA

• Quality Checking – Marking of Errors

• Error Removing

• Re – QC

GENERAL ERROR MARKINGGENERAL ERROR MARKING

ERRORERROR REMOVINGREMOVING

EDGE MATCHINGEDGE MATCHING

TOPOLOGY CHECKTOPOLOGY CHECK

• Removal of Gaps

• Removal of Overlaps

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

REMOVAL OF GAPSREMOVAL OF GAPS

REMOVAL OF OVERLAPING REMOVAL OF OVERLAPING ERRORSERRORS

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

RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY

ROUTE OF SURVEYROUTE OF SURVEY

SURVEY TEAMSURVEY TEAM

RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY

WLBA

TCIr

RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY

TCIr / SaD

SaD / WB

RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY

SCIr

WB

RESULTS VALIDATION THROUGH FIELD RESULTS VALIDATION THROUGH FIELD SURVEYSURVEY

HCIrS

SaD

SCIr – Shrubs Crop Irrigated TCIr – Trees Crop Irrigated

HCIr – Herbaceous Crop Irrigated HCRf - Herbaceous Crop Rainfed

WLBA - Water Logged Bare Area WB – Water Bodies

SaFP – Desert Flat Plain BL – Barren Land

Thank you