Spatial data is data that describes the position, shape, and orientation of objects in a defined space. UltraLite provides storage and data management features for spatial data, in the form of points, allowing you to store information such as geographic locations and routing information. Points are defined using a spatial type, ST_GEOMETRY. You use functions and constructors to access and manipulate the spatial data. UltraLite also provides a set of SQL spatial functions designed for compatibility with other products.
A point defines a single location in space. A point geometry does not have length or area. A point always has an X and Y coordinate.
In GIS data, points are typically used to represent locations such as addresses, or geographic features such as a mountain.
Discuter à propos de cette page dans DocCommentXchange.
|Copyright © 2013, SAP AG ou société affiliée SAP - SAP Sybase SQL Anywhere 16.0|