High Precision Geometric Leveling Network — RNGAP
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Provided by Agência para a Modernização Administrativa
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Dataset information
Catalog
Country of origin
Updated
2021.06.22 16:29
Created
2021.06.22
Available languages
Portuguese
Keywords
cartografia-oficial, nivelamento, snig-dgterritorio-gov-pt, vertical, altimetria-batimetria, infofeatureaccessservice, dgt, cotas, infomapaccessservice, altitudes, localizacao
Datasource
Quality scoring
205
Dataset description
The High Precision Geometric Leveling Network (RNGAP) is the infrastructure that constitutes the official strict altitude system for the national territory. The official vertical reference system of the Continent refers to the average sea level in Cascais until the last day of 1938, which is why it is called Cascais Helmert 38.
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