Mean horizontal gradient of bougueranomaly UTM32 100m
Description
Horizontal gradient of the middle bougueranomaly over a base of 4 km. This special representation serves the surveying administrations of the Länder as a planning basis for gravimetric measurements in the sense of the field instruction for terrestrial gravimetry (FA-TG, Section C.4.1.1)
The timeliness of the dataset (2016) corresponds to that of the quasigeoid model GCG2016.
The spatial data set is the basis for the representation of the quasigeoid in the WMS Gravity. For this purpose, the original grid of the GCG2016 was sampled with a grid resolution of 100 m in UTM32 projection.
Documentation: https://sg.geodatenzentrum.de/web_public/gdz/dokumentation/enu/wms_schwere.pdf
Data sources: http://sgx.geodatenzentrum.de/web_public/gdz/data sources/data sources_wms_schwere.pdf
Gravity system: International Gravity Standardization Net 1971 (Morelli et al., 1974)
Normal weight: Geodetic Reference System 1980 (Moritz, 1964), no consideration of atmospheric influence
Level reduction: Direct calculation of normal gravity as a function of geographical latitude and NHN height by means of spherical function development up to grade 8
Bouguer plate reduction: none
Terrain correction: Spherical calculation of the full topographic effect (excl. indirect effect of topography on gravity) up to 100 km, digital terrain model with grid width 1’ (approx. 25 m), cuboid method (Forsberg, 1984) in the close range up to 5’, outside tesseroid method (Grombein, 2013)
Reduction density/level: Mainland 2670 kg/m3 / Bathymetry (North Sea, Baltic Sea, Lake Constance) 1000 kg/m3, 0 m above sea level NHN (DHHN92)
Grid processing: Interpolation by collocation (Forsberg et al. 2008), 30" x 45" grid width, 3.6" x 5.4" grid width resampling; projection on UTM32 grid with a grid width of 100 m; Low pass filtering of Bouguer anomalies with 4 km moving average, then gradient formation and scaling to base length 4 km
Intended use: Estimation of the necessary point density for geoid modelling according to the field instruction for Terrestrial Gravimetry (FA-TG) of the AdV, version 1.0, section C4.1.1 with Appendix 8
Unit: mGal/(4 km) = 10^-5 m/s-2 / (4 km)
Timeliness: 2016
Resources
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https://sgx.geodatenzentrum.de/wms_schwere?SERVICE=WMS& |
Tags
- bkg
- bundesrepublik
- wms
- bougueranomalie
- gravimetrie
- opendata
- schwere
- ostsee
- für
- bundesamt
- und
- nordsee
- deutschland