开家DIY店只能做一种吗(比如巧克力DIY）做多种可以吗，要投资多钱

spatial data. Spatial data are any data whose the underlying frame of reference is the Earth’s surface, such as point,
line, surface, and solid.
In the spatial database, a fundamental idea is how to represent geometry. But spatial database contains many
different data formats and structures. These complex data lead to the fragmental data structures and loose
relationships among themselves. Spatial data manipulation and process may be very complex and difficult and tend
to make mistakes.
We attempt to manipulate the RSDD-based data types which we defined using relational database. This method
can employ the mature technology of relational database to solve the complex problem of spatial database. This
paper is organized as follows. In section 1, we briefly explain major concepts about GIS data structures. We
introduce the RSDD-based spatial data type in section 2. Section 3 expresses the idea of using relational database to
manipulate