Shading Map Automatically Generate Software Design And Realization

Digital shaded landscape is the perfect realization of digital mapping technology to a certain stage of development as soon as possible to resolve the issue. This paper focuses on the computer of Digital shaded landscape theory and techniques to achieve to start in-depth discussion, to establish a digital landscape shaded theories and methods related to its technical process of a comprehensive systematic study of the topography shaded automatically to achieve intelligent methods are discussed, on this basis, developed Shading Map automatic generation of software systems, and make a practical application.Paper first studies the principles of landscape and the use of shaded landscape shaded computer methods and models. From the traditional method of starting of shaded landscape landscape shaded the theory, the concept of landscape shaded, classification, and their respective characteristics and light source selection and other issues were analyzed. On this basis, the use of computers to automatically shaded landscape theory has been studied, systematic exposition of the digital landscape shaded implementation and technical steps. Design of digital terrain shaded relief map generated when the illumination model, mapping areas of different light sources summed up the adjustment and use; realize the digital terrain shaded relief map based control and the mathematical method of calculating image transformation; Color shaded topography to establish the basic method of color design, discusses the use of landscape shaded relief map produced digital elevation model data and automatically Shading Map produced by illumination model, discuss the effect of influencing parameters shaded settings, including the production rate, DEM grid side length, vertical height ratio, and the light source direction of the horizontal scale, and related improvements proposed method.Then, the system introduced by the development of the Shading Map auto-generated software system design ideas and approaches. Shading Map in the analysis software automatically generated the overall structure of design ideas, based on the calculation are discussed and parameter adjustment module design and implementation, graphics generation and display module design and implementation methods, terrain analysis, image reading and writing module design and module design implementation, and describes the automatic generation of software Shading Map functionality of each module.Secondly, the show Shading Map generating software demo major interface diagram and function, mainly generated Shading Map shows the main interface, demonstrates the default shaded, color shaded, point query functions like the original DEM data is converted to grayscale images functions, through visual analysis and automatic contour overlay functionality.Finally, the paper developed Shading chart generation software and other Shading Map making software for the comparison and analysis, including ArcGIS production in the Shading Map, ERDAS in the Shading Map production and Surfer in the Shading Map production, and from the parameters set, ease of operation and the effect of three shaded topography were compared, comparing the results show, the paper developed Shading chart generation software with intuitive, scientific and artistic features. The disadvantage is that software can not meet the requirements of the printing and publishing as feature-based geographic information system base map color shaded topography map, terrain and other factors to achieve automatic and precise overlay so pending further study.