Austrian Federal Registration Network
The Austrian Federal Registration Network ( BMN ) is a grid , i.e. a Cartesian coordinate system , which enables a coordinate (x, y), i.e. a northing x and a easting y in meters, to be assigned to a point on the earth . It was introduced in Austria in 1984 for use by civil and military authorities.
Basics
The BMN is based on the Mercator projection , a conformal ( conformal ) cylindrical projection , wherein a transversal horizontal cylinder is used (cylinder axis normal to the axis of the earth ), which was originally on Gerhard "Mercator" Kremer back.
Carl Friedrich Gauß and Johann Heinrich Louis Krüger converted the geographic coordinates latitude and longitude into a right-angled system of metric (geodetic) coordinates (x and y), the Gauß-Krüger coordinate system .
Unlike the Gauß-Krüger coordinates used in Germany, the BMN is based on the MGI reference system, which uses the Bessel ellipsoid with an origin optimized for the geoid in Austria. This combination results in the date Austria ( called Austria NS at Garmin ).
parameter
Since Austria extends in a west-east direction from about 9 ° 30 'to 17 °, one would need four meridian strips each three degrees wide for Austria in the Gauß-Krüger coordinate system, with the central meridians at 9 °, 12 °, 15 ° and 18 °.
The prime meridian ran until 1883 but by the westernmost point of Europe, the Canary Island Ferro (formerly Isla del Meridiano , today El Hierro ), 17 ° 40 'west of the current prime meridian of Greenwich . This means that the territory of Austria can be covered with only three meridian strips: M28 , M31 and M34 (i.e. 28 °, 31 ° and 34 ° east of Ferro). The central meridian of M28 lies 10 ° 20 ′ east of today's prime meridian.
At the BMN counting begins:
- 5000 km north of the equator ( false northing to avoid very large values) and
- 150, 450 or 750 km west of the respective central meridian ( false easting to avoid negative values, similar to the UTM coordinate system ),
see conversion GK - BMN below.
This results in the following parameters for the three meridian strips used in Austria (these values can be entered directly in the user UTM grid with many GPS receivers ):
| Zone | use | western edge |
Central meridian |
eastern edge |
Scale factor |
false easting (km) | false northing (km) | corresponds to UTM zone |
|---|---|---|---|---|---|---|---|---|
| M28 | Vorarlberg, Tyrol | E8 ° 20 ′ | E10 ° 20 ′ | E11 ° 50 ′ | 1 | 150 | −5000 | N32 |
| M31 | East Tyrol, Carinthia, Salzburg, Upper Austria, western Upper Styria |
E11 ° 50 ′ | E13 ° 20 ′ | E14 ° 50 ′ | 1 | 450 | −5000 | N33 |
| M34 | Lower Austria, Vienna, Burgenland, the rest of Styria |
E14 ° 50 ′ | E16 ° 20 ′ | E17 ° 50 ′ | 1 | 750 | −5000 | N33 |
use
The BMN use z. As the ÖAMTC - road maps in scale 1: 150,000 ( Ed Hölzel. , Vienna).
The authorities and organizations with security tasks (BOS), d. H. the federal police (before 2005 police and federal gendarmerie ), the fire brigades and the armed forces use maps on a scale of 1: 200,000 and 1: 50,000 with a printed network with a side length of 2 km. There are also hiking maps on a scale of 1: 25,000.
The Federal Office for Metrology and Surveying is currently putting the national map series of the scales 1: 200,000, 1: 50,000 and 1: 25,000 from the Austrian national surveying system (MGI, Bessel ellipsoid, Gauß-Krüger image) onto the globally standardized Universal Transversal Mercator System (UTM) around.
Conversion into Gauß-Krüger coordinates and vice versa
The specification of Gauß-Krüger coordinates (GK) is widespread in surveying. The two coordinates in BMN and GK can be converted into one another by a simple conversion, since the Austrian federal reporting network is based on the Gauß-Krüger meridian strip mapping. The meridian information plays a major role in the conversion between GK and BMN coordinates. The information on the respective meridian strip used can be found in the design of the card border.
| meridian | Legal value conversion | High value conversion |
|---|---|---|
| M28 | BMN coordinate - 150,000 | BMN coordinate + 5,000,000 |
| M31 | BMN coordinate - 450,000 | BMN coordinate + 5,000,000 |
| M34 | BMN coordinate - 750,000 | BMN coordinate + 5,000,000 |
| meridian | Legal value conversion | High value conversion |
|---|---|---|
| M28 | GK coordinate + 150,000 | GK coordinate - 5,000,000 |
| M31 | GK coordinate + 450,000 | GK coordinate - 5,000,000 |
| M34 | GK coordinate + 750,000 | GK coordinate - 5,000,000 |
Web links
- Sheet numbers of the BEV cards (PDF file; 3 kB)
- BEV: EPSG overview: Geodetic datum and projections in Austria with EPSG codes (PDF file; 31 kB)
- Location information in the BMN from the Federal Ministry of Agriculture, Forestry, Environment and Water Management (PDF file; 274 kB)
- Conversion of degrees to BMN (pdf; 92 kB)
- Conversion formulas from the Austrian Federal Registration Network to Swiss national coordinates
- Different coordinate systems
- Check Austrian Projection - Determination of the unknown coordinate system of a coordinate
Individual evidence
- ↑ The new cards in the UTM system. (PDF) BEV, April 4, 2007, accessed on July 17, 2017 .
- ↑ Automatic detection of the projection of geospatial data. Using free geospatial data and open GIS services on the Internet. (PDF) Retrieved June 2, 2017 .