사진측량 - Digital Elevation ModelDEM에 관한 조사

사진측량 - Digital Elevation ModelDEM에 관한 조사

사진측량 - Digital Elevation Model[DEM]에 관한 조사.hwp

목차 1. DEM(digital elevation model)의 정의 2. DEM 자료의 유형에 따른 장 단점 3. 적 용 사 례 및 이 미 지 본문 1. DEM(Digital Elevation Model)의 정의 출처 - http://en.wikipedia.org/wiki/Digital_elevation_model From Wikipedia, the free encyclopedia A digital elevation model is a digital model or 3D representation of a terrain s surface created from terrain elevation data. There is no common usage of the terms digital elevation model (DEM), digital terrain model (DTM) and digital surface model (DSM) in scientific literature. In the most cases the term digital surface model represents the earth s surface and includes all objects on it. In contrast to a DSM, the digital terrain model represents the bare ground surface without any objects like plants and buildings (see Figure on the right). A DEM can be represented as a raster (a grid of squares, also known as a heightmap when representing elevation) or as a triangular irregular network (TIN). The TIN DEM dataset is also referred as a primary (measured) DEM, whereas the Raster DEM is referred as a secondary (computed) DEM. DEMs are commonly built using remote sensing techniques, but they may also be built from land surveying. 키워드 사진측량, 사진, 조사, 측량