What is resection method?

In surveying, free stationing (also known as resection) is a method of determining a location of one unknown point in relation to known points. The instrument can be freely positioned so that all survey points are at a suitable sight from the instrument.

What is resection method in map reading?

Resection is a method of finding one’s own location on a map by sighting two known landmarks. The procedure is as follows: Find at least two landmarks on the map that can be also identified on the ground. With a compass measure an azimuth to each of the landmarks on the ground.

What’s the difference between union and intersection?

The union of two sets contains all the elements contained in either set (or both sets). The intersection of two sets contains only the elements that are in both sets. The intersection is notated A ⋂ B.

What do you mean by intersection method?

This method is useful where it is not possible to measure the distances on ground as in case of a mountainous country. Hence, this method is employed for locating inaccessible points, the broken boundaries, rivers, fixing survey stations, etc.

What is 2 point resection?

Traditionally, the two-point resection problem, which is coordinating an unknown station from which lines to two control stations and the included angle are measured without setting up on the control stations (free stationing), is accomplished by solving the triangle formed.

What is the purpose of conducting the resection method in the plane table surveying?

Resection is a method of plane table surveying in which location of a plane table is unknown. Location of a plane table is determined by looking it to known points.

What is point of intersection in surveying?

Intersections are the group of planar surveying calculations where we use two control points (three in the case of resection) with known coordinates and certain angle/distance measurements to compute the coordinates of an unknown point.

What is 3point resection?

The three-point resection problem in surveying involves occupying an unknown point and observing angles only to three known points. If the unknown point P lies on a circle defined by the three known control points then the solution is indeterminate or not uniquely possible.