I have been working through trying to get the NOAA ridge radar image to act as an overlay. Looking at other entries on the site I have worked with the image and have it projecting correctly but the png has a semi opaque white background I can't seems to get rid of.
I have tried setting transparent = true
it appears that the warp is adding the white background
gdalwarp -t_srs '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs' radartemp1.png radartemp2.png
i tried also adding -dstalpha but then the layer comes out black...
anyone know how to solve this problem