shptree not faster than no index

[Frank Warmerdam]

John Bolster wrote:
> Thank you for your quick response.
>
> In terms of the county outlines, do you think that one county per file, and
> selecting which files to use with only a tileindex would be faster than all
> counties being in one huge file of over 3000 counties and selecting which
> counties to draw using a qix index?

John,

I think having them in one file would be more efficient.  3000 features
isn't a particularly large dataset, though I suppose if the county outlines
are very detailed it might get fairly large.

> Also, does the qix index on the actual tileindex do anything to speed up the
> tileindex?

Yes, a .qix file on a tileindex will help if there are many entries in the
tileindex.

Best regards,

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