Question : Digital Mapping of the Country

Will the Minister of SCIENCE AND TECHNOLOGY ??????? ?? ???????????? ??????
be pleased to state:

(a) whether the Department of Science and Technology has taken up the task of digitally mapping the entire country;

(b) if so, the details thereof;

(c) whether the existing GPS system which is based on satellite-based navigation system cannot be used for digital mapping;

(d) if not, the reasons for bringing drone based digital mapping system;

(e) the number of States to be covered under the scheme and the accuracy of the digital mapping done by drones; and

(f) the steps taken by the Government to preserve the data?

(a) & (b): Yes Sir. Survey of India (SoI) under Department of Science & Technology (DST) has taken up the work of digitally mapping the entire country being done as per National Map Policy-2005 under "Generation of High Resolution National Topographic Database (HRNTDB)" scheme during next three financial years from 2020-2021, using:

1) High Resolution Satellite Imagery (HRSI) (Sub - meter Imagery): 22.5 lakh sq km.
2) Drone/Unmanned Aerial Vehicle (UAV) (Professional Survey Grade): 10 lakh sq km.

Work components in the scheme are:

i. Ground Control Points provisioning/Data Capturing
ii. Geo-referencing/Data Processing
iii. Feature Extraction
iv. Ground validation/Attribute Collection
v. Final Map Publishing

Deliverables are:

Topographic data layers (based on Spatial Data Model Structure (SDMS) on various scale) viz.
i. 1:2,000/1000/500 scale data/maps for urban/semi urban/rural settlement (abadi) areas.
ii. 1:10,000 scale data/maps for balance areas.

(c) The existing Global Positioning System (GPS) system being used for providing ground control points for data capturing, data processing, geo-referencing and ground validation cannot be directly used for digital mapping.

(d) Drone based Digital Mapping System has been introduced for large scale mapping and is not a referencing system as Global Positioning System (GPS).

(e) 25 States and 7 Union Territories are covered under the scheme. The accuracy of Drone based Digital mapping is ±10 cm Horizontal (planimetry) of Ortho Rectified Image (ORI) and Spatial Resolution and 5 cm Ground Sampling Distance (GSD).

(f) Data is archived in Survey of India (SOI) directorates i.e. National Geo-spatial Data Centre, Dehradun and disaster recovery backup is being done at GIS (Geographic Information System) & Remote Sensing, Hyderabad.

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