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National Geo-spatial Information Aslam Parker
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Applicable Legislation: NGI in existence since 1920 Land Survey Act, 1997 (Act 8 of 1997) – Sec 3A – duties of Chief Director SA Geographic Names Council – CD: NGI is a permanent member Spatial Data Infrastructure Act, 2003 (Act 54 of 2003) – Besides cadastral data, NGI is by far the largest collector and custodian of spatial information in SA
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1.National Geodetic and Control Survey Services 2.National Aerial Photography and Imagery 3.National Maps and Geo-Spatial Information 4.Implement South African Spatial Data Infrastructure 5.Professional and Advisory Services NGI: Key Products and Services
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2. National Imagery Acquisition Programme Since 2008, all imagery acquired will be multispectral (Pan, R,G,B and NIR)
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3. National Mapping & Geo-spatial Information Programme (Land Cover) Drivers behind the need for land-cover – Significant number of legislative (and some voluntary) requirements that need land-cover as either direct or indirect inputs to support reporting requirements on a regular basis. eg NEMBA), NEMA, National Water Act Desertification, National Forest Act, etc… – Also operational departmental requirements from National, Provincial through to Local Municipality levels which require land-cover / land-use data in support of management, monitoring, review and planning purposes. IDP’s, SDF’s, EIA’s
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Last National Programme NLC 1996, NLC2000 Some provincial land cover datasets done as projects For Land Cover: – LCCS based classification with lower levels been defined, however, not widely adopted – Standards not clear and still needs to be defined. To date, 12 pilot sites and North West province 3. National Mapping & Geo-spatial Information Programme (Land Cover)
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South African Land Cover Legend
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Pilot Land Cover Data
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Methodology: collaborating with CSIR, researching multitemporal, multisensor solution for Land Cover MODIS-like processing (building on 10+ years MODIS experience) WELD installed at CSIR, South Africa – data back bone Collaboration with CSIR
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– Area 92100 km2 – Official Land cover map of KZN 2008 - SPOT5 (GeoTerra Image) – Training and validation data were generated from land cover map – centroids (single 30m pixel) of land cover polygons larger than 2 ha (N= 242 620 sites). CSIR Landsat Study Area
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Land cover map from 7 Landsat bands of 4 seasons – 78% accurate
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No global classification system for land sue Methodology (work in progress) Actual Land Use vs Zoned/ Planned Land Use NGI initial proposal: 14 Main classes and 60 sub- classes. – 1. Agriculture & Fisheries, 2 Forestry, 3. Conservation, 4, Mining, 5. Transport, 6. Utilities & Infrastructure, 7. Residential, 8. Community Services, 9. Business & Retail, 10. Industrial & Commercial, 11. Recreation & Leisure, 12. Defense, 13. Unused Land, 14. Water What about leisure/holiday resorts, recreation trails, beach, recreational swimming/tidal pools etc 3. National Mapping & Geo-spatial Information Programme (Land Use)
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General – There is not enough skill and capacity in industry – – Need automated classification methods Land Cover and Land Use- need for automation Completely Manual Semi-automated Pixel based classification Fully Automated Object oriented classification Cost Time
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Thank You aparker@ruraldevelopment.gov.za www.ngi.gov.zav
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