CAJ | 학술논문

在分析矢量栅格数据特点的基础上,提出一系列矢栅一体化查询函数,基于PostgreSQL/PostGIS数据库,实现了支持栅格数据存储与组织的扩展数据类型,并对栅格数据类型与PostGIS矢量数据一体化查询函数进行了扩展实现.最后,通过实例验证了矢栅一体化查询函数的表达能力和解决实际问题的应用前景.
재분석시량책격수거특점적기출상,제출일계렬시책일체화사순함수,기우PostgreSQL/PostGIS수거고,실현료지지책격수거존저여조직적확전수거류형,병대책격수거류형여PostGIS시량수거일체화사순함수진행료확전실현.최후,통과실례험증료시책일체화사순함수적표체능력화해결실제문제적응용전경.
Nowadays,spatial database is the most important way of storing and organizing vector data in GIS applications.While the raster data,which is also a major source of spatial information,is primarily stored as data files because of the intrinsic complexity and huge size.Some GIS and database software vendors began to support raster data in their database products,but only data storage and organization is concerned.Currently,there is not an accepted standard specification for the integrated operation on vector and raster data,although some pilot studies have been taken in recent years.In this paper,the characteristics of vector and raster data were analyzed,and a series of vector-raster integrated functions were given,then a prototype system was built based on PostgreSQL/PostGIS.Lastly,the problem-solving ability of such a database extension was discussed.