Current Work on the Methods of Industrial Measurements Carried out at The Institute of Geodesy and Cartography in Warsaw

Two methods for determination of horizontal displacements of joints in multistoreyed steel supporting constructions forming power plants, were presented in this paper.Information concerning work on increase of accuracy of determining vertical movements with the use of precise levelling were given. Two problems were discussed in detail, namely: 1.Method of decrease of errors in levelling network caused by changes of length of levelling staffs. The following detailed methods have been prepared: method of field measuring changes of lenght of wooden staff body, caused by temperature and humidity fluctuations, method for computing changes of length of invar tape and recommendations for maintaining staffs and their controlling, in order to keep scale stability.2.Method of reduction of results of levelling surveys, due to technogenic plumb-line inclinations. Method for creating maps of changes of gravity at the regions of opencast mines and barrier lakes has been also prepared.The main aim of research work on industrial measurements, conducted at the Institute of Geodesy and Cartography, is to prepare methods for measuring displacements and deformations of different objects and constructions.