Apologies, after revisiting this this morning, I can't reproduce what I was seeing... now I do see the raster being bilinearly upsampled when I overzoom. Sorry about that!
On Fri, Sep 10, 2021 at 11:08 AM Patrick Young < patrick.mckendree.yo...@gmail.com> wrote: > As a quick follow up, a hack that worked to get around this was to make a > VRT of the low resolution dataset wherein I set the resampling to bilinear > in the VRT and set the resolution to much much higher, and that has the > desired effect. So the question is, is there a better way to achieve the > same thing in mapserver. > > Thanks! > > On Fri, Sep 10, 2021 at 10:17 AM Patrick Young < > patrick.mckendree.yo...@gmail.com> wrote: > >> Hello! >> >> I was curious if it is possible to have mapserver bilinearly upsample a >> low resolution raster to a higher resolution when there is no reprojection >> required. >> >> My setup is that I have a very low resolution image (a bathymetric layer) >> and a much higher resolution image (aerial), both in web mercator. When I >> request a high resolution XYZ tile, the low resolution image remains >> pixelated (it looks as if its is nearest neighbor upsampled) at the >> raster's native resolution even though I have set in the PROCESSING >> directive RESAMPLE=BILINEAR. >> >> I suspect from the docs that RESAMPLE only comes into play when we're >> doing on-the-fly reprojection, is that correct? When no reprojection is >> required, but just simpler upsampling, can one change the kernel used? >> >> Many thanks! >> Patrick >> >
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