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GIS is primarily associated with spatial data. In the most GIS, the spatial data as a file, together with the attribute data, is stored in relational database. So it is difficult to keep data security data management and data consistency. PostgreSQL and PostGIS can store spatial data and attribute data in one database; this makes it easy to manage and use data. In this paper, the features of spatial...
Space operations in spatial database operation is the most complicated and time-consuming operation. Query in the spatial database is a basic feature. I describe several methods about spatial data query and query processing steps. I also gives an algorithm about intersect query in filtering stage in this article to improve the price of database operations, and the efficiency of database queries.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.