期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2005
卷号：XXXVI-8/W27
出版社：Copernicus Publications
摘要：To improve the infrastructure of a region, the existing features such as settlements, roads, railways and waterways have to be docu- mented completely. In developing countries this basic information is often missing, incomplete or obsolete. To use automated seg- mentation algorithms (multispectral / knowledge based classification) with satellite data, geometric resolution, spectral bands and processing techniques are the most important parameters to get an optimal result. The aim of this investigation is to analyse how Landsat 7 ETM+ data can be used for this purpose. Especially the new panchromatic band with its higher resolution is examined in combination with the multispectral information and additional layers (e.g. vectors) as artificial bands. The main results of the investi- gation are as follows: The separation of settlement areas is without problems. The detection of linear features is not satisfying in the used test area with a domination of less contrast. The integration of the panchromatic band conduct an improvement of less than 10% in accuracy assessment. A practical solution which leads to an acceptable result is to integrate visually digitised vector information as an artificial band into a hierarchical classification algorithm
