[postgis-users] srid

[Markus Schaber]

Hi, Bob,

Bob Pawley <rjpawley at shaw.ca> wrote:

> I think I have the spatial_ref_table with a couple of rows that should be 
> recognized by the ST_Transform function.
> 
> However, I now get the error "Input geometry has unknown (-1) srid".
> 
> Does anyone have a thought on how to overcome this? Is this error realing 
> telling me that the function still doesn't recognize the srid?

No, it is telling you that the input geometry (the one that you feed
into st_transform) has the SRID -1 which is reserved for unknown SRIDs.

As st_transform() transforms between two reference systems /
projections, you have to use setsrid() to apply the correct srid to the
source geometry, and then you can transform it to the desired targed
srid.

Regards,
Markus

-- 
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf.     | Software Development GIS

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