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Document PC_Compress function

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Sandro Santilli 2015-04-13 17:07:14 +02:00
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@ -405,6 +405,20 @@ Now that you have created two tables, you'll see entries for them in the `pointc
> Returns a patch with only points whose values are the same as the supplied values
> for the requested dimension.
**PC_Compress(p pcpatch,global_compression_scheme text,compression_config text)** returns **pcpatch** (from 1.1.0)
> Compress a patch with a manually specified scheme.
> The compression_config semantic depends on the global compression scheme.
> Allowed global compression schemes are:
> - auto -- determined by pcid
> - ght -- no compression config supported
> - dimensional
> configuration is a comma-separated list of per-dimension
> compressions from this list:
> - auto -- determined automatically, from values stats
> - zlib -- deflate compression
> - sigbits -- significant bits removal
> - rle -- run-length encoding
## PostGIS Integration ##