黄河下游堤内滩地土地利用的GIS分析

GIS-BASED ANALYSIS OF EXISTING LANDUSE IN THE LOWER YELLOW RIVER

应用航空彩红外土地利用解译图,以ARC INFO为支撑软件,建立了黄河下游河道滩地(花园口至孙口河段)土地利用现状数据库。通过空间拓朴叠加分析,得到不同类型滩地的土地利用状况。并以数字高程模型为基础,本文分析土地利用与河道滩地的空间分布规律。

Existing landuse database system (DBS) in the area between two fjood-control dykes of the lower yellow River from Huayuankou to sunkou, based on ARC/INFO geographical information system software, was developed by using landuse interpretation maps of air infrared photos taken in June, 1988, and other thematic maps such as topographical maps. DBS is comprised of database and database management system (DBMS).The database consists of existing landuse, floodland distribution, digital elevation model. The data model is a hybrid of relational and topological models. Locational data may be represented explicitly, or topologically, as a series of x,y coordinate, Attribute data, discribing feature names, symbols and classification, are stored in feature attribute tables.Polygon overlay and isomorphic buffer operation are used to study the landuse structure and the landuse difference among three kinds of floodland. Landuse data were traped on digital elevation model (DEM), showing the spatial distribution of existing landuse and floodland.GIS-based analysis of existing landuse is featured by use of multisources information and information integration through ARC/INFO, powerful analsis functions such as spatial retrieval and query, statictical calculation and space modelling .