期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2004
卷号：15
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：Dcternination accuracy for digital elevation model (DEM) marks depends on input information obtaining methods and assigning ways and on mathematical elevation modelling methods. Basic input information obtaining methods for DEM construction are: geodesic,photogramme?tric,cartometric,and in last years — terrain scanning method. The method choise depends on two main factors: point marks determination accuracy and economic efficiency. When analyse general tendencies for methods application,geodesic method and terrain scan?ning are used on small areas when high accuracy for point marks determination needed;photo?grammetric method is used in wide scales range from small-scale to large-scale,often for topography production renewal and for survey of dynamic processes,concerned with terrain elevation. Determination accuracy for input points o f digital models with photogrammetric met?hod depends on photographing height,camera type,atmospheric impacts,aircraft movement, which effects on aerial photo image resolution and its measuring characteristics. Cartometric method is connected with map scanning. Since elevation is small variable with time quantity,usage o f topography maps for DEM construction is justified and economically effi?cient. Cartometric method is mainly used for large areas DEM construction,it may be used for ap?plications solving when scanned map accuracy ensures DEM construction accuracy demands. Basic input information obtaining methods for DEM construction are level,triangulation and bitmap models [Magnuszewski A. 1999].
