Calculating Storage Requirements for Spatial Tables/Indexes

Hello all,
Can anyone tell me how to estimate the size of the spatial indexes? We are using fixed tile index type for indexing the polyline & point data, both being stored in seperate tables.
Thanks,
Kishore
null

Hi Kishore,
You cannot know in advance for polygon or line data - it is dependent on the number of tiles generated for each geometry, which in turn depends on the sdo_level chosen, the the shape of the lines, the length of the lines, the location of the lines within the coordinate system, the orientation of the lines, etc.
Since each point will have only one tile associated with it, you can safely assume about 100MB of spatial index for every 1 million points.
Hope this helps, and regards,
Dan

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