Laoshan Forest Geographic Information System Establishment And Application

In this paper, the theory of geographic information systems and technology, to Nanjing, the old forestry basic spatial data, graphical information for the establishment of geographic information systems, and use relational data model and visualization techniques, the use of object-oriented programming language and GIS completed the second development component Map objects old forestry geographic information system interface design and program design, information management. The basic function of the realization of the show are as follows:(1) With drawings:system graphics database shows the function is through Visual Basic6.0 programming languages and graphics editor language MapObject2.4 linxiangtu and planning design in accordance with the requirements of the compiler added. Choose the task bar drop-down menu on the inside of the project, the user can through the intuitive editing statistics and inquires the display and modification. (2) Two-way integrated query:through the spatial data and attribute data, to realize the inquires between the following functions:①the space position, known features its attributes. Inquiry Classes of road, such that the graphics (figure yuan), get attribute data query.②the properties, features some known in its main regional distribution, query that input attribute inquires the views on conditions, can inquire on the properties that the corresponding figure yuan, and in the view to spike bright status display. (3) Statistics analysis and summary:use ArcView3.3 based on field numerical aggregation function to Summarize and statistical functions Statistics classes respectively the investigation factor, summary, statistical analysis, it is concluded that the special TAB and basic modules histogram. In this paper the key technologies involved include forestry spatial database building, VB6.0 visual programming technology and Map objects fully integrated the programming language.Old forest farm of the establishment of geographic information system, to further implement the farm forest resource information management in the over all development and application of digital sample and good database support, and some of China's forestry unit of the establishment of geographic information systems provide a valuable reference experience.