[Proj] FW: SCAR Antarctic PS projection issue in proj

[Norman Vine]

> -----Original Message-----
> From: Mark Fahnestock
> Sent: Thursday, December 01, 2005 5:13 PM
> To: norman vine
> Subject: SCAR Antarctic PS projection issue in proj
> 
> 
> Hi Norman,
> 
> Here is the detail on the issue I talked to you about regarding  
> setting up a WCS for the SCAR projection - this projection has an  
> EPSG identifier, but is not making it in to proj:
> 
> This projection is in the EPSG database, but doesn't survive some  
> translation stage that generates the epsg file in /usr/local/share/proj
> 
> 
> EPSG:3031 is the SCAR Antarctic Polar Stereographic Projection - lat0  
> -90  lon0 0 lat_ts -71  ellipsoid WGS84 datum WGS84  Units meters -  
> note that the scale factor is 1.0, because lat_ts is set.  I believe  
> that for PS projections, the scale factor is used (or is different  
> than 1.0) only when the latitude of true scale is not used.
> 
> the older instances of proj I have on my systems do not have this  
> entry at all, but this entry (see below) leads me to think that the  
> translation may be fixable.  Note that the <3031. is missing because  
> of the error.  I don't know if this is the only affected file, or if  
> there would be others that would need to contain this entry.
> 
> 
> from .../share/proj/epsg:
> <3027> +proj=tmerc +lat_0=0 +lon_0=15.80827777777778 +k=1.000000  
> +x_0=1500000 +y_0=0 +ellps=bessel +units=m +no_defs  <>
> # RT38 0 gon
> <3028> +proj=tmerc +lat_0=0 +lon_0=18.05827777777778 +k=1.000000  
> +x_0=1500000 +y_0=0 +ellps=bessel +units=m +no_defs  <>
> # RT38 2.5 gon O
> <3029> +proj=tmerc +lat_0=0 +lon_0=20.30827777777778 +k=1.000000  
> +x_0=1500000 +y_0=0 +ellps=bessel +units=m +no_defs  <>
> # RT38 5 gon O
> <3030> +proj=tmerc +lat_0=0 +lon_0=22.55827777777778 +k=1.000000  
> +x_0=1500000 +y_0=0 +ellps=bessel +units=m +no_defs  <>
> # WGS 84 / Antarctic Polar Stereographic
> # Unable to translate coordinate system into PROJ.4 format.
> #
> # WGS 84 / Australian Antarctic Polar Stereographic
> # Unable to translate coordinate system into PROJ.4 format.
> #
> # WGS 84 / Australian Antarctic Lambert
> <3033> +proj=lcc +lat_1=-68.5 +lat_2=-74.5 +lat_0=-50 +lon_0=70  
> +x_0=6000000 +y_0=6000000 +ellps=WGS84 +datum=WGS84 +units=m  
> +no_defs  <>
> # ETRS89 / ETRS-LCC
> <3034> +proj=lcc +lat_1=35 +lat_2=65 +lat_0=52 +lon_0=10 +x_0=4000000  
> +y_0=2800000 +ellps=GRS80 +units=m +no_defs  <>
> # ETRS89 / ETRS-LAEA
> <3035> +proj=laea +lat_0=52 +lon_0=10 +x_0=4321000 +y_0=3210000  
> +ellps=GRS80 +units=m +no_defs  <>
> # Moznet / UTM zone 36S
> <3036> +proj=utm +zone=36 +south +ellps=WGS84  
> +towgs84=0,0,0,-0,-0,-0,0 +units=m +no_defs  <>
> 
> Thanks for checking in to this,
> 
> Mark
> 
>