江汉平原土地资源数据库的建立与功能

根据所收集的江汉平原土地资源数据及相关图件（包括１９８３年版１：５万地形图，１：５万各县市土壤图，利用多时相卫片编制的１：２５万专题图），以ＰＣ－５８６微机为主机，以ＰＣ ＡＲＣ／ＩＮＦＯ地理信息系统工具软件为支持，建立了江汉平原土地资源数据库，其内容包括行政区划空间数据库（各县市行政区划图１：５万），水系空间数据库（各县市河流，沟渠及水面图，１：５万），土壤空间数据库（各县市１：５万土壤图），土

ESTABLISHMENT AND FUNCTION OF THE DATABASE FOR LAND RESOURCE IN JIANGHAN PLAIN

According to land resources data and related maps,e.g.:topographic maps of 1:50 000 in scale,soil maps of 1:50 000 in scale,special topic maps of 1:250 000 in scale that are drawn up using satellite photo,and with the aid of ARC/INFO geographic information system,this paper introduces the establishment of the database of land resource in Jianghan Plain.The base includes administrative division map(scale 1:50 000),water system map (scale 1:50 000),soil map (scale 1:50 000),landuse map (scale 1:250 000),investigation and statistic data etc(including wasteland,barren hill,barren beach,mid low yield field,arable land etc).This database has three main functions:(1)inquiring about information (2)preparing forms for reporting statistics (3)making special topic maps e.g.:water resources maps,per capita arable land map).On the basis of landuse maps in the 1980's and 1990's,by function of database,we made the maps of arable land change and development division of land,by way of joining with related forms and function of statistics in ARC/INFO,we got form of arable land change and areas of different regions.