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 "description": "The 1km x 1km aerial photography grid is based on the 5km x 5km aerial photography grid. The 5km x 5km aerial photography grid was developed in the nineteen eighties by the old Regional Services Council. Its practical use is to provide a unique number for each tile of 1km x 1km 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. Each 10km x 10km geocell is divided into four 5km x 5km cells, named A, B, C, D. Each 5km x 5km geocell is further divided into twenty-five 1km x 1km cells, numbered 1 to 25. The reference for each 10km x 10km geocell is derived from the top right corner and is made up of two digits \u2013 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 Lo19 Meridian.The 5km x 5km grid numbers are as follows: W00A, W00B, W00C, W00D, W10A, W10B, W10C, W10D, W20A\u2026One row of cells is added to the east of the Lo19 Meridian: E00A, E00C, E01A, E01C, E02A, E02C\u2026.The 1km x 1km grid numbers are as follows: W00A_1, W00A_2, W00A_3\u2026.. W00A_25, W00B_1, W00B_2, W00B_3\u2026.. W00B_25, W00C_1\u2026. 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 W50B_5 (North)Y = 50 000 and x = 3 800 000 gives W50B_5 (South)In the 1km x 1km grid the municipal area does not cover any duplicate tiles, and therefore it is not necessary to rename any 1km x 1km cells.",
 "summary": "",
 "title": "Aerial Photography Grid 1 Km X 1 Km",
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 "accessInformation": "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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