3D Mapping of Selected Regions Using NavIC Receivers

Authors : K.R. Hariharan; K. Shravan; Sree Lakshmi M; Vishnu M

Volume/Issue : Volume 7 - 2022, Issue 12 - December

Google Scholar : https://bit.ly/3IIfn9N

Scribd : https://bit.ly/3hB5Slm

DOI : https://doi.org/10.5281/zenodo.7465975

3D mapping is profiling of objects in three dimensions to map real objects. It is an important tool in creating 3D scenes of a location that are useful for many studies like high rise development, building interior and exterior and effects of a disaster Among the several other ways to obtain a 3D map, remote sensing satellite data or a UAV can also be used to obtain the mapping data. Remote sensing is a technology that allows measuring object's properties from a distance, which is currently undergoing tremendous advances in both precision and areas of applicability. Large area 3D city models can be created using stereo pairs of aerial photographs or high-resolution satellite images and is less cost-effective technique for many applications. UAV’S take aerial images over an area incorporated with spatial data based on GNSS to produce a high-resolution 3D image. The main objective of our project is to prove a method of elevation mapping alternate to DEM for a low- budget experiment or survey of a smaller region. It also shows that mapping is, yet another application of Navigation with Indian Constellation (NavIC) developed by ISRO. We achieved this by using the NavIC receivers available to us from the college NavIC Lab. The antenna is firmly placed on a mobile platform, along with the setup which includes a laptop to record the data and to display the signal strength from the satellites; a fair strength of signal from four satellites was the minimum requirement for a reading of reasonable accuracy. The setup is required to be moved along the area to be studied, in a gridded manner. The area is gridded and marked prior to the conduction of survey. This helps to cover most of the irregularities and variations in the topography. With this project we hope to demonstrate the use of satellites to prepare highly accurate 3D Digital Elevation Models which has numerous applications in geological studies.


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