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The survey leader has to decide an appropriate contour interval for his project before start of survey work. The following factors govern the selection of contour interval for a project:
|S.No||Factor||Select High CI like 1m, 2m, 5m or more||Select Low CI like 0.5m, 0.25m, 0.1m or less|
|1||Nature of ground||If the ground has large variation in levels, for instance, hills and ponds||If the terrain is fairly level|
|2||Scale of the map||For small scale maps covering a wide area of varying terrain||For large scale maps
showing details of a small area
|3||Extent of survey||For rough topographical map
meant for initial assessment only
|For preparation of detailed map for execution of work|
|4||Time and resources
|If less time and resources are
|If more time and resources are available|
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2 comments on "What are the factors governing Selection of Contour Intervals?"
i personaly apreciate the notes, they are good
it is interesting notes ,continue pls