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Leveling instrument - Horizontal control: Chaining or taping between points. - Plotting: Contours are plotted directly from field book. This method is suitable for small areas and for detailed surveys. It is time consuming. 06/28/17 29 Indirect Method: In this method, the contours are not directly located in the field. Instead, spot levels are taken at suitable intervals along a series of lines running across the area. These spot levels are plotted on a base map and the c
- Author
- Mark Ryce
- Language
- EN