Uranium Corporation Limited has been allotted seven mine lease areas in Jharkhand state. SPARC assisted in carrying out the forest & environmental study and preparation of the geo-referenced forest land map of the diverted forest land and auxiliary maps and reports. The process involved collection of the revenue cadastral maps for the lease area, collection of record of right document for the concerned villages, consultation with the respective forest division offices for approval of the forest land involved within the lease area and preparation of the forest land schedule. GIS based processing of the input documents were carried out through grid correction/ digitization/ mosaicking of the revenue maps and the forest land schedule and linking the data sets through the key field to generate the spatial land database for the forest land. The DGPS survey and geo-referencing of the forest land was conducted with reference to the Principal Control Points (PCP) established within the coal block area through 72hr observation of dual frequency DGPS devices. Secondary Control Points (SCPs) were identified through DGPS observation of the permanent ground features of the revenue maps and geo-rectification of the revenue cadastral map sheets. Post-processing of the simultaneous observation recordings of the PCP as well as the SCPs were carried out though the post-processing utility software for delineation of the forest land. Desk study and identification of the boundary change-point coordinates of the forest land were carried out. The change point coordinates were used to stake-out the ground location for demarcation of the change points within the lease area. The geo-referenced forest land map was submitted to DFO for onward submission to MoEF along with the Forest Diversion Proposal.
The GIS/DGPS based forest land study of the mine lease area helped in
- Precise identification of the boundary coordinates of the forest land involved in the lease area for compliance measure to the MoEF
- Quick generation of the geo-referenced forest land map for the diverted forest land to be submitted to MoEF along with the Forest Diversion Proposal
High Resolution Satellite Imagery, Geographical Information System, Differential GPS survey, Database Management System