Ulyanovsk State Agricultural Academy named after P.A. Stolypin
1,
The Federal Service for State Registration, Cadastre and Cartography (Rosreestr). The office of the Ulyanovsk region
2,
Abstract:
The matters of metrological maintenance and using elementary ways of the field comparators appliance for current calibration of levels, light-rangefinders, total stations and GPS-receivers are considered.