中尺度生态评价研究中格网空间尺度的选择与确定

Study of Determining the GIS Raster Size in Mid-scale Ecological Assessment Research

在研究实验数据的基础上,对中尺度(1∶100000比例尺)区域生态环境系统安全评价的区域尺度、制图尺度、成图视觉效果、数据精度、数据量负荷之间的辨证关系进行了系统的研究,建立了中尺度区域生态安全评价的基本格网分析评价单元———即25m×25m的GRID格网单元。研究成果建立起了区域生态安全评价研究基本格网评价单元确定的方法论。

Using the experimental data, the relations among the regional scales, mapping scales, visual effects of the maps, data precision and data loads of the regional ecological environmental system security assessment in midscale (scale of 1∶100 000) were systematically studied and the digital study environmental framework of the assessment on regional scale of the ecological environmental system security were gained. The midscale GIS raster assessment unit size of the regional ecological environmental system security that the 25 m×25 m raster GRID unit was set up. The result of this paper can be regarded the technology methodology and the theory basis as establishing midscale as well as any other scales of GIS raster sizes of the regional ecological security assessment units.