Inventory of Existing Spatial Data Sets and Fresh Generation Requirements
The extent of fresh data generation requirements will be assessed based on the inventory of existing data sets in map and digital format, generated under national and State programmes.
The existing data sets will be reviewed under a set of standard criteria (level of thematic classification, mapping and thematic accuracy, age of data, and availability) for acceptance in HP. Additional generation of data sets (thematic mapping and digitization, digitization of existing maps and format conversion of existing digital data sets) will be defined for each state. The preparation of these data sets will be as per the standard methodology proposed by HP, to ensure consistency and uniformity amongst the participating States.
Standard Methodology for Generating Data Sets
The methodology will cover i) fresh thematic data generation, ii) digital conversion of fresh and existing thematic maps and select details from SOI maps, and iii) format conversion of existing digital data set. A similar procedure has been successfully followed in a large number of national programmes to produce consistent data sets. The methodology manual will include:
- Directory of spatial data sets, covering selected themes, input data, output data, generation methodology and data conversion requirements.
- GIS data base organization – primary layers, scale of data, map projection, location references, template coverage of 8 states with 15 min* 15 min interval in geographic coordinates, mapping/thematic/digitzation accuracy, registration accuracy between layers, mosaicing of sheets within and across the States, and data coding standards
- Themewise chapters - classification scheme, input data specifications, methodology in flow chart, internal QC and external QA, validation criteria for delivered product, specifications of output data products.
- Format of report for each digital map-
quality audit statement(sheet code, generation date, mapping
/thematic /digitization accuracy); brief description of input
data, generation procedure, output products; contact address for
future interaction
Procedure for Generating Data Sets
The Ground Water department of each participating State will be responsible for generating data sets within the State. The data sets will be produced through outsourcing to vendors through a competitive bidding procedure.
A State level Technical Committee consisting of representatives from the State Surface and ground water agencies, Central Water Commission and Central Ground Water Board will support the State GWD. It is recommended to include the Geological Survey of India (GSI) for i) technical inputs on geology related themes and ii) to facilitate procurement of data sets from the National Geoscientific Data Centre developed under GSI-BRGM Project. The technical committee will provide guidance and support on defining fresh spatial data generation, bid evaluation, external independent quality audit of data products and integration of spatial data sets into the State Surface and Ground Water Data Centres.
The HLTG will oversee all the generic aspects such as selection of minimum GIS data sets, standard methodology to be followed, bidding procedure including vendor qualification by appropriate weighting, and integration of GIS data sets into the State and National Data Centres.