View In:
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Parent Layer:
September 22
Name: Aerial Photography Grid 10 Km X 10 Km
Display Field: GRID_CELL
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The 10km x 10km grid was developed in the 1980s by the old Regional Services Council. Its practical use is to provide a unique number for each tile of 10km x 10km aerial (ortho) photography when dealing with aerial contractors and for planning purposes. Furthermore, it can be used as a useful reference guide to identify area's of interest for other geospatial work. The rectangular grid intersection co-ordinates are in Gauss Conform using positive Westings and Southings. The top right corner origin falls on the Lo19 Meridian and is at y = 0 and x = 3 700 000. The reference for each 10km x 10km geocell is derived from the top right corner and is made up of two digits – the first being the first digit of the y value and the second being the third digit of the x value. For example the geocell with a top right hand corner value y = + 30 000 and x = + 3 740 000 would have a reference of 34. In addition the letter W is added in front if the cell is located west of the Lo19 Meridian and the letter E is added if located east of the Meridian. The 10km x 10km grid numbers are as follows: W00, W01, W02, W03… One row of cells is added to the east of the Lo19 Meridian: E00, E01, E02, E03... One row of geocells in the south has duplicate numbers going beyond x = 3 800 000: Y = 50 000 and x = 3 700 000 gives W50 (North)Y = 50 000 and x = 3 800 000 gives W50 (South). Therefore, duplicate tiles have been suffixed with a N for tiles lying in the north or S for for tiles lying in the south. In this case, W50N and W50S.
Copyright Text: Information & Knowledge Management Dept., Geospatial Section, 1st Floor, Keller House, 121 Loop Street, Cape Town. Contact: Ms. Lara Röttcher, Tel. 021 487 2599, email: lara.rottcher@capetown.gov.za. Data distributed by City Maps public counter, 7th Floor, Keller House, 121 Loop Street, Cape Town.
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Supported Query Formats: JSON, geoJSON
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Supports Advanced Queries: true
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Use Standardized Queries: true
Supports ValidateSQL: true
Supports Calculate: true
Extent:
XMin: 2030309.603428213
YMin: -4085033.4986853837
XMax: 2127179.4613762517
YMax: -3951687.3114076606
Spatial Reference: 102100
(3857)
Drawing Info:
Renderer:
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HasZ: false
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HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Type ID Field:
Fields:
-
OBJECTID
(
type: esriFieldTypeOID, alias: OBJECTID, editable: false, nullable: false, defaultValue: null, modelName: OBJECTID
)
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GRID_CELL
(
type: esriFieldTypeString, alias: Grid Cell Reference, editable: true, nullable: true, length: 8, defaultValue: null, modelName: GRID_CELL
)
Templates:
-
Name: Aerial Photography Grid 10 Km X 10 Km
Description:
Prototype:
Drawing Tool: esriFeatureEditToolPolygon
Capabilities: Query,Extract
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