Surveys and Mapping Department

The Uganda Geodetic Reference Frame (UGRF) provides the framework for all positioning activities in the Country. The foundational elements of Northings (N), Eastings (E), Elevation, and Geoid Model information impact a wide range of important geospatial activities in Uganda.

The UGRF is composed of the following classes of Geodetic Control Points:

• 9 Zero Order Geodetic Control Points with 6 Auxiliary Points
• 129 First Order Geodetic Control Points
• 297 Second Order Geodetic Control Points
• 40 CORS
• Geoid Model – UGEOID2020

The information on the individual stations and data can be accessed, including the ITRF2005 Cartesian coordinates for the CORS sites, but not all the sites may be available from the UGRF servers at the time of accessing them.

The GNSS Constellations for the CORS is made up of the following:

• GPS, Global Positioning Systems of USA
• GLONASS system of the Russian Federation
• Galileo system administered by the European Union
• The Chinese Beidou system
• Japanese Quasi-Zenith Satellite System (QZSS) augmentations

The services available from the UGRF Site include:

• CORS
  • RTK Services
  • Post Processing Services
  • Rinex Data
• Geodetic Catalog
  • Interactive map showing the stations and the passive control points
  • Description Cards of the stations and passive control points
  • Geographic, Geocentric, and Cartesian coordinates of the stations and the passive control points
• Coordinate Transformation
  • Coordinate Transformation Tool (Circé 5 software)
  • Transformation Parameters
• Geoid Model
  • UGEOID2020 Data
• Frequently Asked Questions (FAQ)
• Informative Materials
  • CORS Establishment Guideline
  • Land Survey Data Submission Format
  • Public Notice on Migration from Arc1960 Datum to ITRF2005 Datum

The services enlisted above are accessed through a web browser and are absolutely FREE of CHARGE. You do not need to pay any money to access the services. All you need is to register or create an account for you to access the services at your disposal (for more information, contact the: Office of the Commissioner of Surveys and Mapping, Entebbe or the Site Administrator).