[Qgis-user] Projection problem in QGIS 1.7.2 between EPSG 31370 and EPSG:3035

[Giovanni Manghi]

Hi,

beside the expected differences because the layers are from different
sources, I can't see any particular shift

http://ubuntuone.com/7TJnox4OFSxdMaPteNMsW9


cheers


-- Giovanni --


On Mon, 2011-12-19 at 21:25 +0100, Paul Lens wrote:
> Hi,
> 
> When I open projects saved earlier in QGIS 1.6 with 1.7.2, there is a 
> shift between the belgian data, projected with EPSG 31370 (Belgian 
> Lambert 72 conformal conic), and the european environmental agency data 
> using  EPSG:3035 - ETRS89 / ETRS-LAEA.
> The european shapefile is shifted 103m: X: 94m westward; Y: 64m northward.
> 
> Here are the links to the freely donwloadable shapefiles:
>      - belgian (Walloon Region) Natura 2000 limits: 
> http://environnement.wallonie.be/cartosig/telechargement/NATURA2000_DIFFUSION_BASE_MARS2010.zip 
> 
>      - european Natura 2000 limits:  
> www.eea.europa.eu/data-and-maps/data/natura-2000     (I use the 2009 
> version)
> 
> This seems to be a bug of QGIS 1.7.2. as I experienced no shift with 
> QGIS 1.6, or do I miss something?
> 
> 
> Paul
> 
> NB: QGIS 1.7.2 opens without problem an older project on the 
> french-belgian border, where I experienced a shift between EPSG 31370 
> and the different french Lambert projections.
> 
> FIY: this was then solved thanks to ticket OSGEO 3362 by making a custom 
> projection with a minus sign added to one of the elements:
> 
> Custom projection:
> +proj=lcc +lat_1=51.16666723333333 +lat_2=49.8333339 +lat_0=90 
> +lon_0=4.367486666666666 +x_0=150000.013 +y_0=5400088.438 +ellps=intl 
> +towgs84=-106.8686,52.2978,-103.7329,0.3366,-0.457,1.8422,-1.2747 
> +units=m +no_defs
> 
> EPSG 31370:
>   +proj=lcc +lat_1=51.16666723333333 +lat_2=49.8333339 +lat_0=90 
> +lon_0=4.367486666666666 +x_0=150000.013 +y_0=5400088.438 +ellps=intl 
> +towgs84=-106.869,52.2978,-103.724,0.3366,-0.457,1.8422,1.2747 +units=m  
> +no_defs
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