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README.md

be_ign_README.txt

The files in this section result from the conversion of datasets originating from IGN Belgium

Included grids

Belgium: BD72 -> ETRS89

Grid transformation from Belgium Datum 72 to ETRS89 in Belgium.

Source: IGN Format: GeoTIFF converted from NTv2 License: Creative Commons Attribution 4.0 Credit: (c)2014-2016 Grid created by Nicolas SIMON.

It provides an accuracy better than 5mm in 99.6% of validation points and a worst case of 1.3 cm outside the border. Recommended to transform from Belgian Lambert 72 (EPSG:31370) to Belgian Lambert 2008 (EPSG:3812) Documentation in French: (http://www.ngi.be/FR/FR2-1-7.shtm) Documentation in Dutch: (http://www.ngi.be/NL/NL2-1-7.shtm)

  • be_ign_bd72lb72_etrs89lb08.tif

Belgium vertical grid:

Source: IGN Format: GeoTIFF converted from 'XYZ ASCII Grid' License: Creative Commons Attribution 4.0 Credit: C. Slobbe, R. Klees, H.H. Farahani, L. Huisman, B. Alberts, P. Voet, F. De Doncker (2018). The Belgian hybrid quasi-geoid: hBG18. V. 1.0. GFZ Data Services. http://doi.org/10.5880/isg.2018.003
Horizontal CRS: EPSG:4937 (ETRS89)

Vertical transformation for Geoid model hGB18. Used to make the transitions from heights in vertical CRS (EPSG:5710 - Ostend height) to heights above the ellipsoid in ETRS89 (EPSG:4937).

  • be_ign_hBG18.tif