[Qgis-user] QGIS UTM projection of longitudes > 180 degrees

[Nicolas Cadieux]

Hi,
When experiencing this kind of difficulty, I normally just save the files in the desired projection.  On the fly will have difficulties when crossing “projection limites”.  Keep in mind that reprojecting data will change the values so keep a back up of the original data.
Nicolas

> Le 26 mai 2018 à 10:36, Eric Fielding <Eric.J.Fielding at jpl.nasa.gov> a écrit :
> 
> I have some geophysical data (subducting slab depth) that is stored in NetCDF raster format (from this download site https://earthquake.usgs.gov/data/slab/models.php). I am working with the file that is for Mexico and Central America in a regular WGS84 longitude-latitude grid (CRS EPSG:4326), and it has the longitudes all as positive numbers, i.e. from 254 to 279 degrees. When I load this in QGIS and plot it in the original EPSG:4326 projection, it plots in the positive longitude as expected. When I try to use the on-the-fly CRS transformation to plot the map in UTM zone 14 (EPSG:32614), the raster does not plot. I have other data in CRS 4326 (raster and vector) that has negative longitudes and that plots in the UTM zone 14 map view. When I do plots with the Generic Mapping Tools (GMT) software, it does not care whether the longitudes are negative or > 180 degrees. Do I need to shift my gridded data to have the negative longitudes to work with it in QGIS? 
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