To build a new city or Township, surveying is to be done by considering all development works necessary for the city. The development works like street roads, property boundaries, water and sanitary pipes location, electrical lines, telephone lines etc. are involved in the city surveying.

In the preparation of topographic map, the whole area on which a township is going to build is divided into number of sectors. Each sector is enclosed by a polygon which are having a connection on common sides. In each sector, closed traversing is conducted using theodolite.