Riga quasi - geoid model
As of April 15, 2021, a new quasi-geoid model RIGA′20 is available, which has been developed by the City Development Department of the Riga City Council (hereinafter - RDPAD).
When determining the normal height in the implementation of the European Vertical Reference System (hereinafter - EVRS) for the territory of Latvia in the Latvian normal height system in the epoch 2000.5 (hereinafter - LAS-2000.5) with global positioning, the national quasi-geoid model is used. If another quasi-geoid model is used, the developer shall verify its accuracy by performing control measurements and assessing the accuracy of the model in a chamber.
RDPAD has performed a model accuracy check and submitted its results and model assessment to the Latvian Geospatial Information Agency (hereinafter - the Agency) for publication on the Agency's website.