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December 2000
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The National (Natural) Resources Information System
Table 2 Primary Spatial
Database Elements
| S.no |
Element |
Source |
| 1 |
Landuse / cover map for different dates. nnnn
indicates year of map preparation |
Remote Sensing Data (RS) |
| 2 |
Geomorphic units & Landforms captured from
source map |
Hydrogeomorphological map (RS) |
| 3 |
Rock Group/ Lithological units |
-DO- |
| 4 |
Geological structures like lineament, fault,
fracture etc., - captured from source map |
-DO- |
| 5 |
Soil type, depth, texture etc., for associations /
series/family etc., |
RS/Soil agencies |
| 6 |
Drainage |
Toposheet/ RS |
| 7 |
Canals |
Toposheet/ RS/ Irrigation Dept |
| 8 |
Elevation contours/ spot height points with value in
metre at suitable interval |
Toposheet/ RS |
| 9 |
Watershed hierarchy polygons |
All India Soils & Land Use Survey up to Water
shed level. |
| 10 |
State/District boundaries (State/ Centre node
only) |
Toposheet |
| 11 |
District/Taluka boundaries(Both State/District
node) |
Toposheet |
| 12 |
Village boundaries (District/Node only) |
Census maps |
| 13 |
Forest management / Administrative boundaries like
Division/ range / compartment etc., |
State Forest Dept., Toposheet |
| 14 |
Location of Wells, nature of Wells, yields
particulars, water quality etc. |
State/Central Ground Water Depts. |
| 15 |
Settlement locations / areas spread |
Toposheet/Census maps |
| 16 |
Roads |
Toposheet/Public Works Depts./RS |
| 17 |
Rail network along with Railway Stations |
Toposheet/ RS |
| 18 |
Rainfall / temp observation locations for Rainfall/
Temp data - monthly (Min/Max. /Ave.) |
Met Dept. |
| 19 |
Minerals |
Geological Survey of India/ Dept. of Geology &
Mines |
| 20 |
SOI toposheet references, Lat.-Long.
reference |
Toposheet |
Table 3 Primary Non-Spatial
Elements
| S.no. |
Table Name |
Source |
Acceptable Age / Update
frequency |
| 1. |
Demographic data Village wise - District Node Taluka
Wise - State Node |
Primary Census/ District Information System of
NIC |
10 yr. |
| 2. |
Occupation data |
- do - |
- do - |
| 3. |
Educational Facilities |
Bureau of Economics & Statistics/
DISNIC |
Bi-annual |
| 4. |
Medical Facilities |
- do - |
- do - |
| 5. |
Communication Facilities |
- do - |
- do - |
| 6. |
General Facilities |
- do - |
- do - |
| 7. |
Land Use |
- do - |
- do - |
| 8. |
Power |
- do - |
- do - |
Implementation of the NRIS Interim Plan
A team of scientists from DOS, along with the State Remote Sensing Applications Centre, SRSAC, visited each state to present the details of the programme to the senior administrators and to solicit their co-operation and support. The actual task of database realisation is the responsibility of the State Remote Sensing Applications Centres. Hence, each of the SRSACs is the designated work centre under NRIS. The seven DOS work centres, Space Applications Centre, National Remote Sensing Agency and the Regional Remote Sensing Service Centres at Bangalore, Nagpur, Kharagpur, Dehradun and Jodhpur are in liaison with the state centres and are helping to facilitate the work. The DOS has also funded a large part of the plan by providing the necessary hardware and software as well as the services of its staff. The states have also providing significant contribution by way of infrastructure, staff and data. A set of remote sensing entrepreneurs have been identified by the Department of Space and qualified by the NRIS Project for data digitisation as per the NRIS standards. Other vendors have been identified for mapping from remote sensing data and for data entry.
Standardisation
In order to standardise the databases to facilitate information exchange a detailed Standards Document has been prepared and distributed to all work centres [4]. The NRIS Standards cover the database specifications, naming conventions, accuracy specifications and hierarchical classification of each theme. It also lays down procedures for database validation and accuracy estimation. Drawing upon the accumulated experience of remote sensing and GIS, scientists working in DOS and user agencies arrived at these standards. A change management procedure has also been incorporated. The standards were revised to include changes to accommodate a more elaborate soil classification scheme and to remove certain anomalies observed during the initial database implementation phase. This approach has yielded results in two ways. Firstly, it has been possible to distribute the database creation jobs to entrepreneurs without worrying about registration problems. Secondly, application modules can be easily integrated with the database. This allows simultaneous development of application modules for the databases and interoperability between modules and databases is assured.
Table 4 Node Database Design
Specifications
| S. No. |
|
District Node |
State Node |
Centre Node |
| A. Input
Specifications |
| 1 |
Location Reference |
.Latitude-Longitude/ Permanent
features |
| 2. |
Scale |
1:50,000 |
1:250,000 |
1:1,000,000 |
| 3 |
Projection/Map standard |
Preferably polyconic (SOI
Base) |
| 4 |
Thematic
Accuracy |
| 4.1 |
Minimum Spatial Unit (2mm) |
10,000 m2 |
250,000 m2 |
4,000,000 m2 |
| |
0.01 km2 |
0.25 km2 |
4 km2 |
| 4.2 |
Mapping |
90/90 |
90/90 |
90/90 |
| |
Sample checks in field |
| 5 |
Control Accuracy ( with
respect to control points on Survey of India Toposheets) |
| 5.1 |
Planimetric (RMS) |
50 m |
250 m |
1000 m |
| 6 |
Legends |
As per details in Integrated Mission for
Sustainable Devlopment technical guidelines |
| B. Database
Specifications |
| 1 |
Spatial
Framework |
| 1.1 |
Registration scheme |
A set of Registration points-preferably
SOI sheet corners/Lat.-Long. intersections/road intersections etc.
|
| 1.2 |
Projection/Co-ordinate system |
Polyconic (local to district) |
Polyconic (local to State) |
Polyconic (local to Centre) |
| Subject to further study |
Central meridian & standard parallel
at the centre of node |
| 1.3 |
Co-ordinate units |
metre |
Metre |
metre |
| 2 |
Accuracy/Error
Limits |
| 2.1 |
Element Registration into system (RMS) |
12.5 metre |
62.5 metre |
250 metre |
| |
Location check against permanent
features |
| 2.2 |
Area |
0.3% |
0.3% |
0.3% |
| |
Sample check Digital area, Values subject
to experiment |
| 2.3 |
Weed tolerance |
12.5 metre |
62.5 metre |
250 metre |
| |
Inspection of log file |
| 2.4 |
Co-ordinate Movement Tolerance (CMT) |
12.5 metre |
62.5 metre |
250 metre |
| 2.5 |
Sliver Polygon Tolerance |
2500 m2 |
62500 m2 |
1000000 m2 |
| |
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0.025 km2 |
0.625 km2 |
1 km2 |
| |
Digital MSU- 1mmx1mm map
equivalent |
| 2.6 |
Grid size (For Raster GIS) |
25x25 m |
125x125 m |
500x500 m |
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