I have a geotiff raster image that has a coordinate system with longtitudes from 0 to 360.
The horizontal center of the image is 180 longtitude. See image below:
I want to transform it to EPSG:4326 SRS with -180 180 longtitude range.
And I want the center of the image to be at Greenwich meridian (0). I guess this srs is very widely used. I expect the result look like this:
So I use a gdalwarp command to reproject:
gdalwarp -s_srs '+proj=latlong +datum=WGS84 +pm=180dW' -t_srs EPSG:4326 test_col.tif test_4326.tif
But I only get a tiff with bigger dimensions (more pixels) and EPSG:4326 metadata. The image itself looks the same, as the initial one. But I expect it to swap the hemispheres.
The question is – how do I gdalwarp an image to be strictly -180 180 EPSG:4326 with the center in 0 longtitude?
This is gdalinfo of my initial file:
Origin = (-0.102272598067084,89.946211604095552)
Pixel Size = (0.204545196134167,-0.204423208191126)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.1022726, 89.9462116) ( 0d 6' 8.18"W, 89d56'46.36"N)
Lower Left ( -0.1022726, -89.9462116) ( 0d 6' 8.18"W, 89d56'46.36"S)
Upper Right ( 359.897, 89.946) (359d53'50.18"E, 89d56'46.36"N)
Lower Right ( 359.897, -89.946) (359d53'50.18"E, 89d56'46.36"S)
Center ( 179.8975000, -0.0000000) (179d53'51.00"E, 0d 0' 0.00"S)
This is gdalinfo after gdalwarp
Origin = (-180.102727401932952,89.946211604095552)
Pixel Size = (0.091397622896436,-0.091420837939082)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left (-180.1027274, 89.9462116) (180d 6' 9.82"W, 89d56'46.36"N)
Lower Left (-180.1027274, -89.9699975) (180d 6' 9.82"W, 89d58'11.99"S)
Upper Right ( 179.8211116, 89.9462116) (179d49'16.00"E, 89d56'46.36"N)
Lower Right ( 179.8211116, -89.9699975) (179d49'16.00"E, 89d58'11.99"S)
Center ( -0.1408079, -0.0118929) ( 0d 8'26.91"W, 0d 0'42.81"S)