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GRAVIMETRIC MEASUREMENTS

HMGS has established a network consisting of 8 gravimetric stations of 0 order, 56 gravimetric stations of 1st order and 87 stations of  2nd order. Measurements of gravimetric variations have been conducted periodically. More specifically:

  • All the 0 order stations have been measured  in 1994 - 1996
  • 1st and 2nd order stations are measured approximately every 10 years. For 1st order there are measurements for 1986, 1988 and 2005 while for 2nd order there are measurements for 1988 and 1995-2000     

Only the value of absolute gravity is supplied.


MEASUREMENT STATIONS OF MAGNETIC VARIATION  

HMGS has established a 1st order network consisting of 108 stations for measurement of magnetic variation (D). Measurements are conducted periodically (appr. 80 stations are measured each year).

Magnetic variation (D) can be supplied for each station and year of measurement. Also, the magnetic variation can be calculated (by linear interpolation) for any point with given geographic coordinates (longitude, latitude), date and year.


MAPS OF GRAVITATIONAL ANOMALIES

Maps of gravitational anomalies (both of  bouguer and free air) have been produced in scales 1:250.000, 1:1.000.000 and 1:2.000.000 (reduction from 1:1.000.000).

More specifically, there are 31 mapsheets  of 1:250.000 scale and 1 mapsheet of 1:1.000.000.

Maps of gravitational anomalies are supplied in paper. For raster (scanned) georeferenced format please contact HMGS.   

click to view a sample of Bouguer 1:250.000 map
click to view a sample of Bouguer 1:250.000 map

click to view a Bouguer 1:1.000.000 sample map
click to view a Bouguer 1:1.000.000 sample map


MAP OF MAGNETIC VARIATION

HMGS publishes a map of magnetic variation in 1:1.000.000 scale appr. every 5 years. Maps have been published in 1976, 1981, 1995 and 2000.

The first map in digital format will be produced in 2006. 

click to view a sample of magnetic variation map
click to view a sample of magnetic variation map


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