I am looking at MapX and MapY coordinates. The docs say they are "truncated State Plane coordinates: NAD 1983 State Plane Louisiana South FIPS 1702 (US Feet)."
I am trying to reproject into a common lat/long like wgs-84 by using PostGIS so I need the srid for this projection.
I found the spatial reference page for the state plane coordinates http://spatialreference.org/ref/esri/102682/ -- but it does not list the SRID.
I found this page of common SRIDs -- but if I plug in the SRID the projection does not output correct lat/longs.
How can I find an authoritative SRID?