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  4. Estimation of height difference of alignment accuracy between different epochs of measurements

Estimation of height difference of alignment accuracy between different epochs of measurements

ISTCGCAP.
2005;
Volume 66, Number 66
: 113-117
Authors:
  1. A. Celms
1
Latvia University of Agriculture

This article is about first class leveling measurements made in three campagnes in Latvia: from 1929 till 1939 ;from 1967 till 1974 ;from 2000 till 2004 in lines Kolka - Rucava, Riga - Plavinas - Riga and Ainazi - Riga. There are discused obtained elevations and changed values of them in different epochs. There is also aviable assessment about changes acomplished given.

1. Celms A., Helfrica B., Kronbergs M. First class leveling in Latvia in 2000 and 2001. In: BALTIC SURVEYING '02, International scientific-methodical conference, proceedings. - Jelgava, 2002. P. 125-130,

2. Liebsch, G., Dietrich, R., HalbfaB, S. Determination of heights and heights changes in the Baltic See region using the Baltic See Level GPS Campaigns 1993 and 1997. Reports of the Finnish Geodetic Institute. - 1999.

3. Ozol L. Using of levelling network, of Latvia to fix vertical movement of the earth crust. -Tartu, I960.

4. Randjarv I. Vertical movements of the erth'scrust in the Baltic region. Reports of the Finnish Geodetic Institute. - 1993.

5. Catalogue of heightof levelling points, Enterprise No.5 MAG&K. -Riga, 1987; Latvia SSR precise leveling. People's Commissariat of the Land, ~ Riga, 1941.