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23 lines
1.2 KiB
23 lines
1.2 KiB
# This init file provides definitions for CH1903 and CH1903/LV03
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# projections using the distortion grids developed by Swisstopo.
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# See: https://shop.swisstopo.admin.ch/en/products/geo_software/GIS_info
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#
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# You'll need to download the grids separately and put in a directory
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# scanned by libproj. Directories may be added to the scan list through
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# the PROJ_LIB environment variable
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#
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# Note that an independent effort was made to derive an usable grid
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# from the CH1903->CH1903+ grid initially available from the Swisstopo
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# website. You can read about this other effort here:
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# http://lists.maptools.org/pipermail/proj/2012-February/006093.html
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# It may be of interest because the latter was by some reported as being
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# more accurate than the former:
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# http://lists.maptools.org/pipermail/proj/2012-February/006119.html
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#
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# This init file uses the official one
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#
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<metadata> +origin=Swisstopo +lastupdate=2012-02-27
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# CH1903/LV03
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<1903_LV03> +proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel +units=m +nadgrids=CHENyx06_ETRS.gsb +no_defs
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# CH1903
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<1903> +proj=longlat +ellps=bessel +nadgrids=CHENyx06_ETRS.gsb +no_defs <>
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