TODO
KOGIS (= Koordination, Geo-Information und Services) is, along with
eCH, the custodian of INTERLIS language/specification. KOGIS coordinates some activities in the
Swiss Bundesverwaltung related to Geoinformation (GI) and GIS
GML is an
XML grammar that allows to express
geographical features. It is defined by the
Open Geospatial Consortium (OGC).
Spaten is a geo data format that purports to resolve issues that arise from using legacy serialization methods and simplify workflows.
WGS84
WGS84 is the latest revision of the WGS (World Geodetic System) standard.
WGS includes
- Definitions of fundamental and derived constants of coordinate systems.
- The Earth Gravity Model (EGM)
- A description of the associated World Magnetic Model (WMM)
- A current list of local datum transformations
Definition
- The origin of the coordinate system is the Earth's center of mass (whose uncertainity is believed to be less than 2cm !)
- The WGS84 meridian of zero longitude is the IERS Reference Meridian, 102 meters or 5.3 arc seconds east of the Greenwich meridian.
- The WGS 84 datum surface is an oblate spheroid with equatorial radius a = 6'378'137 m at the equator and flattening f = 1/298.257'223'563.
Apparently, it is planned to move to IGS20 on 27 November 2022 (not sure if this move has taken place).
INTERLIS
INTERLIS is a software independent description language used for modelling and
exchanging geodata.
FMT
H3
H3 is a
Hexagonal hierarchical geospatial indexing system.
This system divides the surface of the Earth into 12 pentagons and n hexagons. The number of n depends on the resolution.
The resolution varies from 0 (110 hexagons of approx 4,3 million km
2) to 15 (Approx 569 hexagons of 0,895 m
2), see
cell statistics.
H3 uses the a/the
dymaxion orientation which means that ale centers of the 12 pentagons are located in water.
The github repository is
here.