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Spatial Application Hardware Requirement Considerations
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11.1.0.0.0
1.18 Spatial Application Hardware Requirement Considerations
This section discusses some general guidelines that affect the amount of disk storage
space and CPU power needed for applications that use Oracle Spatial. These
guidelines are intended to supplement, not replace, any other guidelines you use for
general application sizing.
The following characteristics of spatial applications can affect the need for storage
space and CPU power:
■ Data volumes: The amount of storage space needed for spatial objects depends on
their complexity (precision of representation and number of points for each
object). For example, storing one million point objects takes less space than storing
one million road segments or land parcels. Complex natural features such as
coastlines, seismic fault lines, rivers, and land types can require significant storage
space if they are stored at a high precision.
■ Query complexity: The CPU requirements for simple mapping queries, such as
Select all features in this rectangle, are lower than for more complex queries, such as
Find all seismic fault lines that cross this coastline.
1.19 Spatial Error Messages
1.20 Spatial Examples
Spatial error message numbers are in the range of 13000 to 13499. The messages are
documented in Oracle Database Error Messages.
Oracle error message documentation is only available in HTML. If you only have
access to the Oracle Documentation DVD, you can browse the error messages by
range. Once you find the specific range, use your browser's "find in page" feature to
locate the specific message. When connected to the Internet, you can search for a
specific error message using the error message search feature of the Oracle online
documentation.
Oracle Spatial provides examples that you can use to reinforce your learning and to
create models for coding certain operations. If you installed the demo files from the
Oracle Database Examples media, several examples are provided in the following
directory:
$ORACLE_HOME/md/demo/examples
The following files in that directory are helpful for applications that use the Oracle Call
Interface (OCI):
■ readgeom.c and readgeom.h
■ writegeom.c and writegeom.h
This guide also includes many examples in SQL and PL/SQL. One or more examples
are usually provided with the reference information for each function or procedure,
and several simplified examples are provided that illustrate table and index creation,
combinations of functions and procedures, and advanced features:
■ Inserting, indexing, and querying spatial data (Section 2.1)
■ Coordinate systems (spatial reference systems) (Section 6.12)
1-22 Oracle Spatial Developer’s Guide