[postgis-devel] WKB conversion

[Mark Leslie]

Obe, Regina wrote:
>
> Possibly dumb question.  In inspecting the postgis code base.  I am
> noticing a few functions restated one
> version for if  WKB_CONVERSION and one for If not.  For example I was
> looking at the PostGIS2GEOS  functions to try to understand what
> exactly those do when I came across these fraternal twins.
>
> Looking thru the code base, I can't see where WKB_CONVERSION is ever
> set or if this is just a hold-over from prior times.
>
> Thanks,
> Regina
>
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>   
This is from ancient memory, but I think that's the flag to control how
we translate between formats.  This is legacy from the jts connector,
and allows us to perform the format conversion either properly, or by
converting first to WKB and then to the JTS or GEOS or PostGIS format
using each products standard WKB parser.  It was (marginally) more
reliable in the JTS connector, but with a significant performance hit.

-- 
Mark Leslie
Geospatial Software Architect
LISAsoft

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