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作为新一代地理信息系统,组件式地理信息系统(ComGIS)已经应用于城市规划、土地利用、交通运输等各个领,,并成为地理信息系统重要的发展趋势之一。本文分析了GIS 在森林资源管理领域中应用的历史、现状及趋势,以解决森林资源管理中存在的实际问题为出发点,根据森林资源数据的地理空间特征,开发了用于森林资源管理的组件式地理信息系统。系统采用Visual C++为开发平台,嵌入ESRI 公司的MapObjects。以西岗子林场为研究对象,对系统设计、数据组织和实现方法等内容进行了阐述。该系统具有很强的实用功能,如,实现各种地图的加载和不同的地图显示方式,可利用鼠标滚轮缩放地图,可对数据进行空间和属性查询,可根据数据特征采用不同的方式着色,利用与矢量图形数据绑定的属性数据控制标识文字(如林班号,小班号),以及根据特定需求输出柱状分析图等。附上部分源代码。图5 参16
As a new generation of geographic information system, ComGIS has been applied in various fields such as urban planning, land use and transportation, and has become one of the important trends of GIS. This paper analyzes the history, status quo and trends of GIS application in the field of forest resources management. Taking the practical problems in forest resources management as the starting point, according to the geospatial characteristics of forest resources data, Geographic Information System. The system uses Visual C ++ as the development platform and embeds ESRI MapObjects. Taking Xigangzi Forest Farm as the research object, the contents of system design, data organization and implementation methods are elaborated. The system has strong practical functions, for example, various map loads and different map display modes are available, the mouse wheel can be used to zoom the map, spatial and attribute queries can be performed on the data, the color can be colored differently according to the data features, Use vector data associated with the vector graphics data control logo text (such as Lin class number, small class number), as well as output according to specific needs such as columnar analysis. Attach part of the source code. Figure 5 Reference 16