Convert between map distance and ground distance using a scale ratio such as 1:1000.
地形图比例尺与图上/实际距离的相互换算
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Definition of scale | Scale = map distance / ground distance, commonly written 1 : N | GB 50026-2020, Code for engineering surveying |
| Map length | Map length = ground length / N | GB 50026-2020, Code for engineering surveying |
| Area ratio | The area ratio is the square of the linear ratio, i.e. 1 : N^2 | ISO 80000-1:2009, Quantities and units - Part 1 ( dimensional relations ) |
| Common scale series | Topographic maps commonly use 1:500, 1:1000, 1:2000, 1:5000, 1:10000 | GB 50026-2020, Code for engineering surveying |
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