With the help of gis technology , arable land features that are obtained from the results of computer auto - classification , are used to spatial overlay analysis . the change law and tendency of arable land during 11 years in 專題研究是在gis的支持下,從兩期的計(jì)算機(jī)自動(dòng)分類結(jié)果中提取出耕地圖層進(jìn)行空間疊加分析,分別從耕地的數(shù)量、空間變化、質(zhì)量三個(gè)方面全面分析龍海市1989 2000年間耕地變化規(guī)律和空間變化趨勢(shì)。
3 . take the lrdmis as info source to discuss the combination of gis and specialty model in information system , by the means of spatial overlay analysis the land use status movements , carried a analysis to number and quality structure of region land type by the means of landscape analysis , and principal analysis was utilized to evaluate experiment area ' s land quality hierarchy . , all the work provided a scientific foundation and technological support for experiment area synthetic management and planning 以lrdmis為信息源,對(duì)信息系統(tǒng)中g(shù)is與專業(yè)模型的結(jié)合應(yīng)用進(jìn)行了探討,通過(guò)空間疊加分析方法對(duì)土地利用現(xiàn)狀變化進(jìn)行了監(jiān)測(cè),應(yīng)用景觀分析方法對(duì)區(qū)域土地類型的數(shù)量與質(zhì)量結(jié)構(gòu)進(jìn)行了分析,應(yīng)用主成分分析法進(jìn)行了試區(qū)土地質(zhì)量分等定級(jí),為試區(qū)綜合治理規(guī)劃提供了一個(gè)新型的技術(shù)支撐體系。
The main technical module of processing gis spatial information of land desertification is designed , which can carry out the spatial overlay of vector data in three periods , extract as well as process attributative information and transform the spatial vector data into visualizing data . the gis database of land desertification is established 本研究設(shè)計(jì)了土地沙漠化gis空間信息處理的主要技術(shù)模塊,即三期矢量數(shù)據(jù)的空間疊加、屬性的信息提取與處理、空間矢量數(shù)據(jù)向可視化數(shù)據(jù)庫(kù)的轉(zhuǎn)化,建立了土地沙漠化gis數(shù)據(jù)庫(kù)。