Important Downloads


  • Many departments in the State have been extensively working on GIS and Remote Sensing Technology and huge volumes of datasets have been prepared at various scales for the State.
  • However, due to lack of coordination there is no standardization on the data
  • Restrictive map policies do not encourage sharing of maps among the departments.
  • To overcome these issues, State Spatial Data Infrastructure (SSDI) is being proposed for the State in the name of TNGIS through the State Level Coordination Committee (SLCC) functioning under the Chairmanship of the Chief Secretary, Tamil Nadu.


“Development and implementation of standardised District and State Level GIS applications for planning and monitoring processes in all the districts of Tamil Nadu using natural resources, socio-economic, demographic and agro-economic data from different sources”

  • Take care of the required standardization for spatial data
  • Enable sharing of spatial datasets through appropriate Government Orders
  • Avoid duplication of efforts and wastage of resources in acquiring spatial datasets from other agencies including Survey of India and National Remote Sensing Centre
  • Create a spatial repository and enable access on vital datasets through Geo-Spatial Web Services with application


  • OGC Standards based Services
  • Datum - WGS 84 (In the GO it is WSG 84)
  • Projection - TM
  • Common Coding for Spatial features, administrative units, etc. to enable smoother integration


  • State Level Coordination Committee (SLCC) is already functional under Chief Secretary
  • G.O Ms. No 2 of IT Department dated 24/01/2014 has sanctioned 132.80 Lakhs Capital Expenditure towards the same
  • Core / Technical Team of Resource Departments to support and deal with technical issues need to be formed under TNeGA to propose the Common Framework, Common Platform, Common Coding, Standards for datasets, Application and Tools, Consolidation of village data.
  • (Minutes of meeting on TNGIS Programme Implementation held on 09/06/2011 at ELCOT)
  • NIC to be assigned the role of Implementing Agency

Technical Committee

  • Drawing and ensuring that the standards are complied with by all Departments
  • Identifying and recommending authentication on various layers – for public or Departmental access only.
  • Common Coding system to be followed in various sectoral Datasets (Spatial / Non-spatial)
  • Time-to-time assessments on the needs (resources / data / others) and providing solutions to acquire the same.

Stakeholder Departments

  • Contribution of Spatial and Non-spatial datasets as per the guidelines of TNGIS technical team.
  • Sharing of Spatial datasets in the standard format as suggested by TNGIS technical team.
  • Ensuring that a common location / other standard coding system (for Roads, etc. that would be useful to many departments) are adopted for GIS / MIS to ensure smooth integration.
  • Resource departments and nodal officers in each department identified to ensure timely commitment of data and updation as and when necessary.
  • Sharing the non-spatial datasets in the standard format recommended by TNGIS technical team, either through services or otherwise. If the data sharing through services is not feasible, ensuring the modalities / mechanism for regular updations.
  • Provision of necessary hardware and connectivity in the Department for its users.
  • Providing necessary inputs to the technical team to ensure that all the queries required by the Departments are addressed in the TNGIS model.
  • Ensuring the timelines suggested for all the above activities are adhered to, so that the project progresses smoothly.
  • Regular usage of TNGIS for Development and Planning and Decision Support processes. Without usage, the System cannot sustain.

TNeGA-Nodal Agency

  • Overall Coordination among all the TNGIS Stakeholder Departments in the State HQ, Districts, Development team, SLCC, etc.
  • Ensure necessary infrastructure and logistics support to the TNGIS development team, Stakeholders, etc.
  • Capacity Building among Departments to ensure progress and sustenance of the whole initiative
  • Building necessary infrastructure at TNSDC
  • Custodian of Base Maps
  • Security Auditing of Web GOS Application

Implementing Agency (NIC)

  • Design and Development of the web based system.
  • Provide all the technical support to the Department officials to capture / re-project the spatial datasets to bring out the data in necessary standard formats.
  • Provide Trainers’ Training at Chennai or at Regional levels so that the officials who got trained can, in turn, train the other officers across the State.
  • Necessary Manuals / Technical Documents in Soft Copy shall be handed over to the Department by NIC.
  • Develop a Web based GIS system (primarily to cater G2G and partially G2C services at a later stage) providing Geo Spatial services to resource departments
  • Leveraging the use of using Service Oriented Architecture so that all Systems interact through Web Services
  • Enabling a Decision Support System for resource departments and District Administrations
  • Provide Implementation Support

The advantages of proposed approach

  • Web based model ensures any-time, any-where usage by authenticated concurrent, multiple users
  • Usage of Open Source Software has also brought down the cost of the overall project by which One Server and 4 clients could be given to District Administration
  • Leveraging mostly on the existing spatial / attribute data sets cut down the cost and duration of the project drastically

List of Stake Holders

  1. The Commissionerate of Survey and Settlement, Chepauk
  2. The Directorate of Rural Development, Saidapet
  3. Institute of Remote Sensing, Anna University, Chennai
  4. Tamil Nadu Water supply and Sewerage Board, Chepauk
  5. Agricultural Engineering Department, Chennai
  6. Institute of Water Studies, Chennai
  7. Forest Department, Saidapet
  8. Highways Department, Chennai
  9. Chennai Corporation, Chennai
  10. Commissionerate of Municipal Administration, Chepauk
  11. Directorate of Town and Country Planning
  12. Directorate of Town Panchayat
  13. Tamil Nadu Slum Clearance Board, Chennai
  14. Chennai Metropolitan Development Authority, Chennai
  15. Chennai Metropolitan Water Supply and Sewerage Board
  16. Directorate of Census, Chennai
  17. National Institute of Ocean Technology, Chennai
  18. Tamil Nadu Urban Infrastructure Financial Services Limited, Chennai
  19. Directorate of School Education, Chennai
  20. Tamil Nadu Electricity Borad,Chennai
  21. Tamil Nadu WaterShed Development Agency


  1. Based on the GIS Technical Committee Meeting held on 14/05/2015 held at State Planning Commission, the Spatial Data Layer shared by various Departments / Organisations have been verified and base layer finalized.
  2. Revenue Village Map Corrected and codification done with the census code with the help of eDMs of respective districts of and in coordination with the officials of Commissionarate of Survey and Settlement.
  3. Panchayat Village Layer corrected and aligned with the Revenue Village Boundary.
  4. Created point locations for Govt. Offices, Govt. Buildings, Hostels & Educational Institutions and integrated with TNGIS Application.
  5.  Based the Data provided by the Health Dept., GPS Locations of accident spots have been imported into TNGIS Application and integrated and plotted in the application.
  6. Distance Analysis and Grid Analysis Tool has been developed for Health Dept. as per their requirements.
  7. Two GIS application modules (Official Module and Public Module) have been developed for Serva Shiksha Abhyan (SSA) to find out suitable location in order to create new schools as per the Govt. norms.
  8. Designed and created Geo-Data Base and Web Map Service (WMS).
  9. Designed and developed Web GIS Framework to view and analyze WMS.
  10. Designed and developed User Management Console Module for TNGIS Application for Govt. Officials and Publics.
  11. So far 100 layers have been created for various Departments / Organisations.
  12. Procured hardware and placed at BSNL  State Data Centre, Chennai – 600001.
  13. A separate Domain Name, has been obtained and the TNGIS Application has been hosted at BSNL State Data Centre, Chennai – 600001.
  14. The Standard Testing and Quality Certification (STQC-IT), Govt. of India, Chennai – 600041 has taken up the Web Security Audit and as and when the Web Security Audit is completed the TNGIS Application will be released to the public.

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