The countrywide historical gravity dataset of Lithuanian territory

The historical gravity dataset of Lithuania consists of two files: data of second and third order gravimetric network as well as data of gravity survey. 
Raw data were collected by digitising the paper catalogues of gravimetric network stations and sheets of gravimetric map at a scale 1:200000. 
Gravity data set covers total territory of Lithuania (65 thousand square km). 
Initially the gravity data were in Potsdam gravity system, geodetic coordinates of the gravity points – in the coordinate reference system Pulkovo 1942 (EPSG:2499), 
and the geodetic heights of gravity points – in the Baltic normal height system of 1977 (EPSG code 5705). 
In the final countrywide set the gravity data are in the International Gravity Standardization Net of 1971 gravity system, 
geodetic coordinates – in European Terrestrial Reference System of 1989 coordinate reference system (EPSG:4258), and 
geodetic heights – in the European Vertical Reference System of 2007 (EPSG:5215). 
Total number of gravimetric network stations is 123, and total number of gravity survey points is 10660. 
The data were recorded into files applying DBF (Data Base Format) format: 
LTU_GNS.DBF - Gravity Network Stations data;
LTU_GSP.DBF - Gravity Survey Points data.