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According to O.S. Adams's General Theory of Equivalent Projections (1945) (p.37, of the article not the PDF): Besides the representation of the two hemispheres just described, it is sometimes desired to represent the whole world on one map. If it is desired to have an equal-area map of this kind, it would be necessary to use a conic projection with ...


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The projection is officially known as EPSG:5070 and included in the EPSG registry and the latest GDAL builds since version 1.9. It is not included in spatialreference.org, because that site has been lacking care for some time. SR-ORG:6703 is not an official code that GDAL or PROJ.4 will know. You can run gdalsrsinfo epsg:5070 and it returns: PROJ.4 : ...


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The proj4txt unofficially seems to be "+proj=aea +lon_0=-96 +lat_0=23 +lat_1=29.5 +lat_2=45.5 +datum=NAD83" gathered from this link. For any future websurfer, here's the insert query I used: INSERT into public.spatial_ref_sys ( srid, auth_name, auth_srid, proj4text, srtext ) VALUES ( 95070, '<insert an identifier>', 95070, '+proj=aea +lon_0=-96 ...


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When I open those files in QGis the srs is epsg:5070 - and the boundaries seem to be in the right place (when compared to a known good 4326 states file).


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Expanding on mkennedy's comment, and translating generic map terms to proj.4 parameters: Projection - Lambert Conical Orthomorphic → +proj=lcc Ellipsoid: Bessel 1841 → +ellps=bessel False Easting : 700000 → +x_0=700000 False Northing : 600000 → +y_0=600000 Central Meridian : 14.0° ...



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