Application Of Digital Aerial Photograph In The Land Use Updating Investigation

With the rapid development of digital photogrammetry,computer and sensor technology, the technique of applying the digital aerial photograph to produce the geographical spatial information data product has gradually mature , and the digital aerial photograph is widely used in such field like land use management, city planning, forest survey etc. Using it, with the digital photogrammetry technology, to make the digital orthophoto map and take the map as data source to carry on the land use updating investigation. This method can be used to solve the past existing problems, such as the poor technology of detailed land survey and updating, the low precision of map and data, the inconsistent of map, data, and field. Also this method to meet the new era's need of land use management and economic construction.The article first discussed the characteristics, technology of digital aerial photograph, and the technical route of land use updating. Take the the land use updating of HuiAn county as research object, using the 3s technology and land use map, proposed the practical operation method of land use updating combining the digital aerial photograph, and compared the various types land area result of using updating investigation and changing investigation two methods, analysis the changing direction of various land use types, discussed the application of digital aerial photograph in land use updating.The article show that, with the help of digital aerial photograph and colored digital orthophoto map, to carry on the land use updating investigation ,can gradually reduce the field investigation working intensity, obtain the newly data of land use scientifically, accurately, efficiently, and reflect the really changing status of various types of land timely and accurately.