[Gdal-dev] EPSG for Virginia State Plane North NAD83 Units: feet

[Tim Bowden]

On Wed, 2007-01-10 at 22:21 -0500, Carl Anderson wrote:
> This issue is likely to repeat.... often
> 
> ESRI extended (inproperly) the EPSG codes. 
> 
> Things coded EPSG:102XXX  should really be ESRI:102XXX
> It seems that lots and lots of US centric projections were redefined 
> with new EPSG codes and very slightly different projective parameters.
> Instead of using the 32XXX code as reserved for custom use, and instead 
> of using their  own namespace (ie ESRI: ) the just blundered ahead 
> picking unused codes.
> 
> I do know that ESRI ArcGIS 9.0 and prior ESRI software releases, used 
> these bad/locally defined codes (the EPSG codes are not in the official 
> EPSG databases).
> 
> for a list of these ESRI codes see
> http://lists.maptools.org/pipermail/proj/2003-March/000663.html
> 
> You should conform to the official EPSG codes to allow for maximum 
> system interoperability.
> A decent resource for valid EPSG codes is at
> http://www.epsg.org/Geodetic.html
> or
> http://mapserver.gis.umn.edu/docs/faq/epsg_codes
> 
> C.
> 
> 

Ouch,  looks to me like either bloody minded arrogance or embrace and
extend...  Now where have I seen that before?

John, Take Carl's advice, not mine.

You may want to add this to your epsg file:
# NAD 1983 StatePlane Virginia North FIPS 4501 Feet
<102746> +proj=lcc +lat_1=38.03333333333333 +lat_2=39.2 +lat_0=37.66666666666666 +lon_0=-78.5 +x_0=3499999.999999999 +y_0=2000000 +ellps=GRS80 +datum=NAD83 +to_meter=0.3048006096012192  no_defs <>

Regards,
Tim Bowden


> Tim Bowden wrote:
> > On Wed, 2007-01-10 at 19:17 -0500, John Mitchell wrote:
> >   
> >> Hi,
> >>
> >> What is the EPSG for Virginia State Plane North NAD83 Units: feet.
> >>
> >> I tried EPSG:102746 within gdalwarp and it said that the SRS failed.
> >>
> >> Thanks,
> >>
> >> -- 
> >> John J. Mitchell 
> >>     
> >
> > There is no 102746 epsg code. You may be looking for one of the
> > following:
> >
> > $grep -A1 Virginia epsg |grep -A1 NAD83|grep -A1 North
> > # NAD83 / Virginia North (ftUS)
> > <2283> +proj=lcc +lat_1=39.2 +lat_2=38.03333333333333
> > +lat_0=37.66666666666666 +lon_0=-78.5 +x_0=3500000.0001016
> > +y_0=2000000.0001016 +ellps=GRS80 +datum=NAD83
> > +to_meter=0.3048006096012192 +no_defs  <>
> > --
> > # NAD83(HARN) / Virginia North
> > <2853> +proj=lcc +lat_1=39.2 +lat_2=38.03333333333333
> > +lat_0=37.66666666666666 +lon_0=-78.5 +x_0=3500000 +y_0=2000000
> > +ellps=GRS80 +units=m +no_defs  <>
> > --
> > # NAD83(HARN) / West Virginia North
> > <2857> +proj=lcc +lat_1=40.25 +lat_2=39 +lat_0=38.5 +lon_0=-79.5
> > +x_0=600000 +y_0=0 +ellps=GRS80 +units=m +no_defs  <>
> > --
> > # NAD83(HARN) / Virginia North (ftUS)
> > <2924> +proj=lcc +lat_1=39.2 +lat_2=38.03333333333333
> > +lat_0=37.66666666666666 +lon_0=-78.5 +x_0=3500000.0001016
> > +y_0=2000000.0001016 +ellps=GRS80 +to_meter=0.3048006096012192 +no_defs
> > <>
> > --
> > # NAD83 / Virginia North
> > <32146> +proj=lcc +lat_1=39.2 +lat_2=38.03333333333333
> > +lat_0=37.66666666666666 +lon_0=-78.5 +x_0=3500000 +y_0=2000000
> > +ellps=GRS80 +datum=NAD83 +units=m +no_defs  <>
> > --
> > # NAD83 / West Virginia North
> > <32150> +proj=lcc +lat_1=40.25 +lat_2=39 +lat_0=38.5 +lon_0=-79.5
> > +x_0=600000 +y_0=0 +ellps=GRS80 +datum=NAD83 +units=m +no_defs  <>
> >
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