I'm trying to overlay a shapefile into a raster. The raster has no defined projection but it's a global raster with extent 0, -1800 : 3600, 0. I tried "on the fly CRS" transformation and followed the projection of my shapefile, and yeah they appeared together but with wrong position. My mistake here is that 3600 is read as 3600 degrees (I think), thus the length became 3600 (the resolution should be 0.1 degrees).
Can I change the extent and resolution when I reproject my raster? and how to change the extent and resolution?
The raster file is in .PNG by the way.