EPSG
Glowny Urzad Geodezji i Kartografii (GUGiK), http://www.gugik.gov.pl
2021-03-18
Geodesy, engineering survey, topographic mapping.
Uses Normal heights. Adopted in 1986.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "Baltic 1986", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "Poland - onshore.", "bbox": { "south_latitude": 49, "west_longitude": 14.14, "north_latitude": 54.89, "east_longitude": 24.15 }, "id": { "authority": "EPSG", "code": 1296 } }