- Common Queries
- Point query: Find all rectangles containing a given point
- Range query: Find all objects within a query rectangle
- Nearest neighbor: Find the point closest to a query point
- Intersection query: Find all the rectangles intersecting a query rectangle
- Common operations across spatial queries
- find : retrieve records satisfying a condition on attribute(s)
- findnext() on Country table returns record about Cuba
- since Cuba is next value after Canada in sorted order of Name
- Nearest neighbor of a given object in a spatial dataset
|
Última modificación: Friday, 18 de November de 2005, 17:56