It may differ from 20 m to 100 m. Closer intervals are essential if floor amount varies abruptly. The cross- sectional line need not be normally be at ideal angles to the key line. This process is ideally fitted to street and railway initiatives. Radial Line Method আমরা সারা বাংলাদেশে https://augustrdntz.bluxeblog.com/64587043/the-2-minute-rule-for-contour-survey-in-dhaka