[Qgis-user] projection ETRS89 : how to shift the longitude/latitude toward saudi arabia?

[Andre Joost]

Am 03.09.2013 11:22, schrieb image:
> Hello,
>
> i would like use a lambert conformical conic. I though at EPSG 3035
> ETRS89LAEA. But this one is centered on europe. I woulk like center this
> projection on Saudi arabia. How to do that with qgis? Could you throw light
> for me?
>

LAEA and LCC are not the same, although named after Lambert ;-)

EPSG: 3035 is defined as:
+proj=laea +lat_0=52 +lon_0=10 +x_0=4321000 +y_0=3210000 +ellps=GRS80 
+towgs84=0,0,0,0,0,0,0 +units=m +no_defs

the lat_0 and lon_0 coordinates define the center of the projection. For 
Saudi Arabia, something like

+proj=laea +lat_0=25 +lon_0=45 +ellps=WGS84  +units=m +no_defs

would be best placed.

If you rather want LCC, take

+proj=lcc +lat_1=20 +lat_2=30 +lat_0=25 +lon_0=45 +ellps=WGS84  +units=m 
+no_defs

HTH,
André Joost