Based On The Topographic Map Of The Dem And Its Accuracy Analysis

With the development of computer and technology of GeographyInformation System, DigitaI EIevation Model and it's application in thegeography area are fall under generaI noticed. DigitaI Elevation Model is notonly as a basic data, but also as a method of thinking.This paper discusses the probIems basing on standard for country basicgeographic lnfOrmation's processing and probing the most efficient of themethod in establishing DEM. The compare analysis and math- statisticsanalysis are the main method probing the DEM's accuracy and the error feature.A thoroughly theoreticaI analysis and a Iarge quantity of experiments are carriedout and numbers of achievement are made in this thesis.This thesis mentioned out space dimension guideline in estabIishing DigitaIElevation ModeI properly. The conclusion giving out has the most importantsignificance in directing the productive practise and investigation.