LUPMIS - GIS User Manual for Land Use Planning

A2.5 Conversions

Annexes > A2. Background to cartography and raster images

A2.5 Conversions

Level of expertise required for this Chapter: Beginner; general GIS training

 Conversion Steps Example Convert degrees minutes seconds to decimal degrees: 1. Take the decimals (digits after the point)2. Divide them by 603. The full number (before the point) are the minutes4. The rest (decimals, after the point) should be divided again by 605. These are the seconds 12.456º 456 456 / 60 = 7.6 7' 6 / 60 = 10 10" --> 12º 7' 10'' Convert degrees minutes seconds to decimal degrees: 1. Take the seconds 2. Divide them by 60 3. Add the minutes 4. Divide by 60 5. These are the decimals of degrees 1º 13' 46.56" 46.56 46.56 / 60 = 0.776 0.776 + 13 = 13.776 13.776 / 60 = 0.2296 .2296 --> 1.2296º Convert m to feet: Multiply m with 3.28084 107.80 m 107.8 * 3.28084 = --> 353.6745 ft Convert feet to m: Multiply feet with 0.30480 15 feet 15 * 0.30480 = --> 4.572 m Convert ha to m2: Multiply ha with 10,000 24.5 ha 24.5 * 10,000 = 245,000 --> 245,000 m2 Convert m2 to ha: Divide m by 10,000 1845 m2 1845 / 10,000 = 0.1845 --> 0.1845 m2 Convert ha to acre: Multiply ha with 2.4711 120 ha 120 * 2.4711 = 296.52 --> 296.52 acre Convert acre to ha: Multiply acre with 0.40468 820 acre 820 * 0.40468 = 331.85 --> 331.85 ha Convert square feet to m2: Multiply square feet with 0.09290 350 squ.ft 350 * 0.09290 = 32.54 --> 32.54 m2 Convert square feet to acre: Multiply square feet with 0.000 022 9 4700 squ.ft 4700 * 0.000 0229 = 0.1076 --> 0.1076 acre Convert acre to square feet: Multiply acre with 43,560 34 acre 34 * 43,560 = --> 1,481,040 squ.ft Convert m2 to acre: Multiply square meter with 0.000 247 11 500 m2 500 * 0.000 247 11= 0.1235 --> 0.1235 acre Convert acre to m2: Multiply acre with 4046.781 2 acre 2 * 4046.781 = 9093.6 --> 9093.6 m2

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