Back to dictionary
General Terms
Geodetic Network
A system of interconnected geodetic points with precisely determined coordinates that serves as the basis for all surveying work.
A geodetic network is a system of interconnected geodetic points that provides a unified coordinate and height reference system throughout the territory. In Latvia, the state geodetic network is maintained by the Latvian Geospatial Information Agency (LGIA).
Geodetic network levels:
- Zero-order network - highest precision GNSS points (IGS stations)
- 1st order network - national primary network, triangulation points
- 2nd order network - network densification
- 3rd order network - local networks in cities and populated areas
- Leveling network - height reference system
Latvian geodetic network:
- Horizontal network - approximately 5,000 points with X, Y coordinates
- Height network - more than 6,000 leveling benchmarks
- LatPos - permanent GNSS base station network (27 stations)
- EUPOS - integration with European positioning system
Importance of geodetic network:
- Provides unified coordinate system
- Allows connecting measurements from different times
- Ensures measurement connection to national coordinate system
- Allows checking measurement precision
Types of network points:
- Triangulation points - with towers or pyramids
- Traverse points - concrete posts or metal pins
- Leveling benchmarks - metal pins in buildings or concrete posts
- GNSS permanent stations - continuously operating antennas
Survey networks:
When performing surveying work, the surveyor creates a local geodetic network:
- Connects measurements to state network
- Creates working points at the site
- Performs control measurements
- Adjusts network and evaluates precision
The geodetic network is a fundamental element that ensures mutual consistency and precision of all surveying work in Latvia.