It varies from 20 m to one hundred m. Closer intervals are demanded if floor amount varies abruptly. The cross- sectional line need not be often be at suitable angles to the most crucial line. This technique is Preferably fitted to highway and railway projects. Radial Line Technique An isohyet https://dronesurvey71482.creacionblog.com/32052474/the-best-side-of-contour-survey-in-dhaka