基于ArcMap的全国草地资源图的研制

详细地介绍了利用美国 ESRI公司的 Arc GIS 8.1软件产品中的 Arc Map模块完成全国草地资源专题地图的计算机辅助设计和样品图打印输出工作的全部过程以及需要注意的问题。草地资源数据来自对 1 999～ 2 0 0 0年全国范围 L andsat TM遥感影像的计算机解译结果 ,背景数据为 1∶ 5 0 0 0 0 0的地理底图数据 ,包括居民点、行政边界、公路、铁路和水系等要素 ;所有数据都已经存贮为 ARC/ INFO- Coverage文件格式。该工作有两部分具体的任务 :1分省草地资源制图设计与样品图输出 ;2 1∶ 5 0 0 0 0 0分幅草地资源制图设计与样品图输出。两部分共完成和输出 2 4 0余幅草地资源专题地图。

Computer Aided Grassland Cartography with ArcMap Software

The whole process of the computer aided cartography of the grassland thematic maps using the ArcMap software, which is a part of the ArcGIS8 1, was introduced in detail in this article, and the particular problems that had been met during the work were illustrated carefully The grass data all over the country was got from the interpretation of Landsat TM remote sensing images that had beenph otographed during 1999²000 The background factors being included in this grassland thematic map cartographic work are residents, administrative boundaries, road system, railway system and fluvial system. And all these background factors have the data sets with spatial resolution of 1∶500 000 Both the grassland data sets and the geographical base maps were made by the ARC/INFO software and were stored as ARC/INFO coverage format files Based on these data sets, the cartographic work was divided into two parts The first part was the cartography of grassland based on all the provincial administrative units except Taiwan province, Hong Kong special municipality and Macao special municipality because of the unavailability of their grassland data sets An atlas including 31 maps in total was got at the end of the work The second part was the cartography of grassland based on the 1∶500 000 scale spatial division of the whole country An atlas including more than 210 maps covering the whole terrestrial section as well as the section of large islands was got at last The first part of the work was much complicated than the other and more flexibility was needed However the second part of the work had a much heavier workload than the first one In view of these obvious differences between the two parts of the work, different workflows were designed respectively to efficiently accomplish them In addition, the computer hardware system and the software environment, especially the ArcMap software needed by the cartographic work were introduced and discussed in detail in this article.