Road extraction is the recurring important application of high-resolution remote sensing images. In order to achieve the goal of road extraction, the various characteristics of geographic information of high-resolution remote sensing images as well as the application and models of road extraction are analyzed, then an effective way of extracting roads from high-resolution remote sensing images is found, and then the high-resolution remote sensing image road extraction algorithm based on texture characteristics assisted by other characteristic information is put forward. The specific process of road extraction in the algorithm is introduced, and the function of road extraction of urban high-resolution remote sensing image based on texture characteristics is also tested practically, the result shows that this method has a higher degree of accuracy in extracting roads from urban high-resolution remote sensing images.
We use various multi-faceted functions to improve fitting accuracy of GNSS level fitting. Propose a method to select kernel function, determine smooth coefficient and a law to choose kernel function node for improving fitting accuracy. We give a formula to calculate smooth coefficient and test it in plain area. The formula has practical significance to improve fitting accuracy and stability of the results.
By using all 103 days GPS data of IGS in china, from year 2000 to 2005, the baseline is solved with GSMIT software. With One day's baseline solution as the input data, based on the mathematical floating model of station, the floating velocity of station is solved and the crustal movement is gotten; then, according to Euler theorem of plate movement, the Euler vectors of Chinese mainland is obtained; furthermore, the floating velocity of the station area in Eurasian plate is acquired. The results show that, in ITRF2000 framework, the station floating velocity is similar with what announced by IGS and so does the Euler vector, which shows that the continental shelf of China has an accelerated tendency to eastward movement.
According to the intensive analysis of metal mine production information database and data characteristics, object-oriented database is primarily discussed to establish for metal mine production information with UML technique. Then the subsequent design idea and approach is presented on mine three-view drawing of metal mine production information system, taking the requests and rules of mapping in metal mine into account and applying the techniques of ObjectARX, to realize three dimension information visualization and automatic mapping of metal mine production information and mining design. In the whole process we cohered with experiences from engineering to do interactive improvement and develop simple and convenient system operation interfaces according with working habits of direct labor on production lines,which owns strong application significance and wonderful popularization value among metal mines at present.
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