Accuracy analysis of DTM generated using different initial data

Abstract

Information Society Development Committee under the Government of the Republic of Lithuania. Electronic Services and Innovations Division. Gedimino pr. 56, LT-01110 Vilnius, Lithuania In the article the accuracy, position and density of the initial data which directly influence the of digital terrain model (DTM) are analysed. The main task - to obtain the data of the first-rate quality which would suit the requirements for terrain model. The number of points should be of sufficient density, not only for terrain model, but also for monitoring accuracy. Qualitative and quantitative characteristics of the data, economic indexes depend on the chosen method of measurement of points of heights. The accomplished research was performed with the purpose to estimate the accuracy of the initial data intended for creation of digital terrain model.