Timeline for Choosing the right geo reference system - NorthEast Atlantic
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Sep 25, 2014 at 12:19 | comment | added | anina | I have just retried this entire process. I redownloaded the data (but this time as a geotiff using grid registered data as opposed to the original cell registered data). I used the 'saved as' function to set the layer to my custom lambert projection as discussed. And then readded it. However the same this has occured, the Layer Extent (layer original source projection) is still as follows. -12391163.6335219126194715,-11350420.2286790478974581 : 12391163.6335219088941813,12724434.0868199747055769 . I am not sure what is happening but i feel like my only option left is to use default WGS84. | |
| Sep 24, 2014 at 12:11 | comment | added | AndreJ |
If it is the same file as mentioned above, you have corrupted it with Set CRS for layer. Maybe setting source_SRS to EPSG:4326 can fix it, else re-add the file to the canvas.
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| Sep 24, 2014 at 8:18 | comment | added | anina | Dam so it hasn't converted. What am i doing wrong? I have edited in a screen shot of my 'warping' page. | |
| Sep 23, 2014 at 14:40 | comment | added | AndreJ | The extent in your screenshot looks still like degrees. It should be xMin,yMin -7826939.43;-3897114.90 : xMax,yMax 5559098.10;2217061.97 in laea centered on 70°North. | |
| Sep 23, 2014 at 12:53 | comment | added | anina | I included screenshot of my metadata tab in the question. The layer seems to be in my custom Lambert CRS. The extents has not changed however. Is this correct? Thankyou! | |
| Sep 22, 2014 at 15:54 | comment | added | AndreJ | To proof the reprojection, look at the extent in the properties, Metadata tab. For degrees, the extent is limited by +/-180/90. Btw, clipping to 89.9 degrees North might solve some problems. Adding .tif to the filename manually would be a good idea. | |
| Sep 22, 2014 at 14:16 | comment | added | anina | Additionally , the output file does not have any extension (i.e. does not show .tiff at the end of it), is this a problem? | |
| Sep 22, 2014 at 13:45 | comment | added | anina | Ok i did that. How do I know if the file has actually been converted, seeing as that every time I import a file to Qgis it it asks for the CRS which i obviously set to the my target CRS. How do I know the coordinates have actually been changed? | |
| Sep 19, 2014 at 12:52 | comment | added | AndreJ |
I am not sure about restrictions for raster files using Save as.... Can you try Raster -> Projections -> Warp?
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| Sep 19, 2014 at 12:43 | comment | added | anina | OK I clipped the region to basically represent what you showed in the map but I am still receiving error message. Is my map not allowed to cross the 0 degree longitude boundary? | |
| Sep 19, 2014 at 11:05 | comment | added | AndreJ | The layer you show covers the whole world. Unfortunately, laea is not valid for the antipodal point, giving you error messages. So you better clip your data roughly to the hemisphere you are interested using degree borders before reprojecting to laea. My projection is centered on 0°E 60°N. You can change that with different lon_0 and lat_0 values. | |
| Sep 19, 2014 at 9:12 | comment | added | anina | This would include the entire area so it looks great. Is your suggested path '+proj=laea +lat_0=60 +lon_0=0 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs' already centered to the middle of my zone? Do i enter this path into the parameters field found at: 'settings' --> 'custom CRS'? Please see new screen shot added above titled ' lambert equual area projection' | |
| Sep 19, 2014 at 8:13 | history | edited | AndreJ | CC BY-SA 3.0 |
deleted 2 characters in body
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| Sep 19, 2014 at 6:58 | history | answered | AndreJ | CC BY-SA 3.0 |