The information extraction and potential analysis of field based on high-precision DEMs

With the development of high-resolution remote sensing satellites, the techniques based on high-resolution remote images are widely applied in the extraction of field information. However, these techniques collect information mainly through information of spectrum, texture, and surface features. This paper put forward a field information extraction method based on profiles. Supported by high-precision DEM data, this method starts with discrete elevations and conducts analysis on profiles in many directions. It finds out the farmland in a testing area by firstly marking the straight line on a profile as farmland and others as non-farmland and then taking the classifications of fields into overall consideration. It has been proven in the test that, with the increase of precision of DEM data, the method is both feasible and promising.