EE shall develop high (0.4 - 0.5 meters spatial resolution) and low-resolution sheets (2.5 meters pan spatial resolution), which will combine hydrological, topographical, social, and environmental and infrastructure data (including existing roads, power grids etc). The high resolution images shall cover existing blocks using high/low resolution Digital Elevation Model (DEM), technical specifications are DEM Positional Accuracies: (For High Resolution) CE90 4-5 meters LE90 2-3 meters NMAS 1:5000 Ortho-corrected Yes, Target Elevation Angle >72 deg Mosaic Yes – High positional accuracy (For Low Resolution) SPOT DEM (30 m or less horizontal accuracies & < 20m vertical)
EE shall undertake technical investigation of contours of water tables including geospatial subsurface groundwater regime on the basis of available geophysical investigations and seams on bore log lithology by hydrogeology consultant(s). This data would be integrated with the results of “Hydrological, Water Supply and Wastewater Management Studies” to be undertaken. The data will be transferred into the GIS and the Consultant shall make a determination as to whether there is sufficient data to prepare 3D model based on the sub surface horizontal and vertical domains delineated and assessed for the domain of aquifers and sub-surface stratification identified by the respective consultant. If not, Consultant shall model according to the data available and provide guidance to the Coal and Energy Department on additional data collection that would be necessary to complete geospatial modeling. This spatial data will contribute in developing tenement mapping and preparing an integrated Geo-data base. Integration and interpretation of geophysical logs and translation into multi layers subsurface strata mapping and geo database records. The GIS model shall enable investors to assess in quantifiable terms extents in 3D space.