Topographic survey techniques
Photogrammetry can be utilized to set up a more prominent thickness of control focuses from which it is then conceivable to aggregate itemized topographic maps. The diagram of components as seen from the air, together with form lines, can be distinguished and followed without any difficulty and economy. Under reasonable conditions, photogrammetry can deliver maps and estimations that are as exact or considerably more precise than those possible by standard ground techniques.
While photogrammetric systems have been widely utilized for topographic mapping, they have contributed less to cadastral studying. In positive circumstances, for instance where there are rice lands with dikes around their edge, terraced slope grounds, or land encased with very much stamped fences or dividers, the photos might have the capacity to supply all the field subtle element required for the cadastre. In different cases this may not be so - for case in some open field frameworks where development of the same yields is completed by various area holders pretty much consistently over a wide range, or in a few territories under tree spread. The airborne photos may demonstrate impermanent subtle element, for instance the divisions of a solitary field between yields, or points of interest inside the overview plot, for example, minor inward seepage trench. These ought not or require not show up on the cadastral guide but rather might be hard to recognize from lasting field limits on the photos.
