Terrastack: Geospatial Algorithms for Land Resources
Project Name: Using Geospatial Algorithms to Modernize Land Records
Partners: Directorate of Land Records (DoLR), Govt. of Maharashtra and Google Research
Sector: Land Records
Categories: GIS Data Structures and Algorithms
Current Team:
- Professor Milind Sohoni
- Professor Bharat Adsul
- Aaryan Dangi
- Lisan Kadivar
- Shashwat Prakash
Description: The Government of Maharashtra is looking to modernize land records, and create geo-referenced (latitude-longitude) ownership plots that are as close a match to ground reality as possible. There are several resources we have at our disposal: village paper maps that often date back to the 1800s, satellite images segmented into polygons that represent distinct farm plots (provided by Google), and some other textual/geometric data for each survey plot.
The central problem we face is that the old paper-based maps don’t match the actual farm boundaries that currently exist; rivers have changed paths, ownership of land has been subdivided, and, most importantly, the old techniques of mapping weren’t precise at all, especially by today’s standards. Hence, there is no one legal map for any village: this is not good news, given the number of legal disputes currently awaiting resolution.
Hence, our task is to take the space partitions of polygons, that is the survey map, first digitized and scaled appropriately, and transform it mathematically (using operations such as rotations, translations, node shifts, etc) to match farm plot boundaries while ensuring minimum deviation in parameters such as area/shape index. We are also looking to explore similar areas, such as creating crop water deficit models for insurance and food agencies.