How to store two maps in Oracle

Greeting, folks,
This message is also refering to the previous topic: help: spatial indexing by QiangHan. Sorry for duplicates here.
Hi,
thanks Dan. It helps a lot.
Actually the thing I really want to do is to figure out what capabilities oracle can store more than one map in database.
If two maps have the same semantic structures and geographic properties, but cover different areas.
May I put all two maps' data into same tables I defined for them? For example, for tourist, I am trying to have two maps: one is for Washton, and the other one is New York, in US.
I have tables such as:
hotels, parks, road-network, attractions, restaurants, hosptials etc. Each of them have two things in common:
1. city id
2. sdo_geometry column
If I could have two maps' data stored in the same tables but distinguished by different city id, it would be great, because I don't need to make two DBs in order to manage them. Everything is under one framework. But when I run queries, I 'd like to use r-tree indexing and b-tree indexing on different data. One for spatial column,the other one for textural column. For b-tree indexing, it is easy to undstand. But for r-tree indexing, it seems a little bit tricky. More than one spatial indexes are required for the same column in one table. Am I right?
As you suggest, I could partition my tables by different id, like city id. Then spatial indexing can be built in different partitions. It would be a good idea to do that. I also agree on that coordinate system must be the same in two maps.
Here, I open this issue. If anyone is interested, please drop some lines. It would be grateful.
Thanks folks.

There is a simple image example available from OTN.
From the OTN main page, go to Products --> interMedia --> Sample Code. The name of the example is "Load rich media content with a browser."
This example loads and retrieves an image from an Oracle8i database through a web page using the Oracle interMedia Web Agent.
Hope this helps.
null

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