The selection of scale is one of the most important considerations during mapping. It is decided on the basis of :
• purpose of the map;
• nature of terrain to be mapped;
• the size of the final sheet;
• availability of resources to get it prepared and printed.
Some of these factors are of opposite and conflicting in nature.Therefore, in selecting the scale, the map-maker has to make a judicious decision and to make a compromise.
Table 2.1 Suggested scales for different types of survey
Serial No |
Purpose of Survey |
Scale |
R.F. |
1. |
Land Survey |
1 cm = 5 m to 50 m |
1:500 to 1:5000 |
2. |
Topographical Survey |
1 cm = 0.25 km to 2.5 km |
1:25,000 to 1:250,000 |
3. |
Building Site |
1 cm = 10 m |
1:1000 |
4. |
Route Survey |
1 cm = 100 m |
1:10,000 |
5. |
Town Planning |
1 cm = 100 m |
1:10,000 |
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