The integrated information units could be identified by a variety of methods according to different data types and issues including overlay - operation for vector gis , cell - partition for raster gis , and for some cases , synthetical consideration based on special treatment or expert - knowledge 針對(duì)不同的相關(guān)因子以及數(shù)據(jù)類型,綜合信息元可以采用數(shù)據(jù)疊加法、綜合法和網(wǎng)格劃分法等進(jìn)行構(gòu)建。