植被格局研究中的基础地理数据数字环境分析

以济南市南部山区部分区域为研究范围，借鉴已有研究成果，采用对比分析法、综合分析法和实验验证法，从坐标系统、地图投影、比例尺和空间分辨率等方面对植被格局研究中基础地理数据数字环境建设进行研究，选定以 1954 年北京坐标系、高斯———克吕格投影、1:10 000 比例尺、10 m 分辨率作为基础数据的数字环境。并得出如下结论：（1）坐标系统的选择首先应该考虑原始数据所采用的坐标系统，应保证所需数据坐标系统的统一性；（2）在选择地图投影时，应充分考虑研究区大小、形状及数据源特征、地理位置、研究专题内容等要素；（3）在比例尺选择时，应充分考虑专题要素制图及分析结果制图要求的信息量和制图精度；（4）在选择栅格数据的栅格大小时应综合考虑眼睛识别能力、数据量、数据要求精度等因素。

Digital Environment of Basic Geographic Data in the Research about Vegetation Pattern

Taking one of southern mountains in Jinan city as a simple area,according to existing research results,and adopting comparative analysis,comprehensive analysis and experimental verification methods,this paper studied the digital environment construction of foundation geographical data in the study of vegetation pattern from aspects such as coordinate system,map projection,scale and spatial resolution.Selecting Beijing cordinate system in 1954,Gauss-kruger projection,1∶10 000 scales,10 meters reslution as the digital environment,it is concluded that:(1) In the choice of coordinate system,coordinate system of used raw data should be first considered,and the unity of coordinate system of used data should be guaranteed.(2) In the choice of a map projection,study area size,shape and geographical location,data source characteristic,research content should be given full consideration.(3) In the choice of scale,information and drawing precision should be given full consideration in the analysis of project factors and results drawing.(4) In the process of ensuring grid size,eyes recognition ability,data accuracy requirement and data quantity should be taken into account.