Notes on Indonesia's Geospatial Information

Overview of Indonesia's Geography

• Indonesia: An archipelago with diverse topography from Sabang to Merauke.
• Seismic Activity: Located in the Ring of Fire Zone, leading to unique geographical challenges.

Role of the Geospatial Information Agency (B.I.G)

• Established under Law No. 4 of 2011 concerning geospatial information.
• OneMap Policy: Aims to unify geospatial information for better policy formulation and decision-making.

Geospatial Reference Systems

• Indonesian Geospatial Reference System: Provides high-end land use data.
• INACORS (Indonesia National Geodetic Control Network): Handles national geospatial reference data.
  • Managed by B.I.G for 24 years.
  • 245 INACORS Stations established across Indonesia by 2020.

National Geodetic Control Network

• Horizontal Control Network (JKHN): Supports accurate coordinate capturing on Earth's surface.
• Data Quality: High-quality equipment and software are prioritized.
  • Daily monitoring of INACORS stations.
  • Immediate issues rectified for optimal system performance.

Survey and Mapping Processes

• Real-Time Kinematic Method: Delivers real-time point coordinates with centimeter-level accuracy.
• Coordinate Updates:
  • JKHN pillars updated every 5 years.
  • Annual updates in regions prone to geodynamic phenomena.

GNSS Data Utilization

• GNSS data provides insights into coordinate accuracy and can be analyzed for other information.
• Cooperation with the German Research Center for Geosciences for projects like the Tsunami Early Warning System.

Tidal Data Management

• Vertical Control Network and Tidal Workgroup: Essential for navigation and disaster management across Indonesia's islands.
• 170 Tidal Stations utilize three sensor types: radar, pressure, and float.
  • Ensures redundancy in data recording.
• Continuous refinement of tidal data for navigational and disaster monitoring purposes.

Communication Challenges

• Underdeveloped infrastructure affects data transmission and accessibility.
• Collaboration with other government agencies for data sharing and efficiency.

Future Objectives

• Construction of Tidal Stations: Expansion planned for 2024.
• Collaboration with Bandung Institute of Technology for tidal model development.

GeoEd Model Development

• Gravity Control Network and GeoIT Workgroup: Tasked with gravity data collection and GeoIT model development.
• Remove-Restore Method: Used for gravity data modeling.
• INA GeoEd 2020: Launched as Indonesia's GeoEd Model, achieving a geoid accuracy level of 5 cm.

Historical Perspective on Coordinate Reference Systems

• B.I.G has launched several systems since its establishment in October 1969.
  • From ID74 (1974) to DGN95 (1995) to the current SRGI 2013.
• SRGI 2013 Services: Accessible online, including geodetic control network, geoid model, deformation model, and atmospheric model.
• Websites for Access: srgi.big.go.id, tides.big.go.id, nrtk.big.gov.id.

Innovation and Research

• Continuous refinement of the geospatial reference system through research.
• Commitment to organizing a better Indonesia through innovative practices.