Hi Rich, Now that is a good question! Perhaps an implied use of those overviews has changed across versions, or a previously-default mapfile parameter has changed. We didn't see anything in the changelog, but to be honest, a lot has changed between versions and maybe I missed something.\
Here is a direct link to the file, in case that is helpful: https://soilmap4-1.lawr.ucdavis.edu/taxa-grid-tms/taxsubgrp/typic_xerofluvents.tif Here is a snippet from the mapfile, the same on both machines. Note that we are using a combination of pattern matching and expressions to select files and apply a color styling. Perhaps there was an implied change to "processing" or "use of overviews" directives in the more recent mapserver version? MAP OUTPUTFORMAT NAME "png" IMAGEMODE RGBA DRIVER "AGG/PNG" MIMETYPE "image/png" EXTENSION "png" FORMATOPTION "GAMMA=0.75" END STATUS ON # set the output projection of map images to 'spherical mercator' used by leaflet maps PROJECTION "init=epsg:3857" END ##### blue 9 from dylan LAYER NAME blue9dylan STATUS ON DATA "%type%/%name%.tif" TYPE RASTER # set the input projection of the source data PROJECTION "init=epsg:3857" END VALIDATION "type" "^taxorder|taxsuborder|taxgrtgroup|taxsubgrp|fm\/gg|fm\/sg$" "name" "^[a-zA-z_\-]+$" "minvalue" "^[0-9]{1,3}$" END CLASS # NoData Values EXPRESSION ([pixel] = 0) STYLE COLOR "#00000000" END END CLASS EXPRESSION ([pixel] >= %minvalue% AND [pixel] <= 2) STYLE COLOR "#E0F7E1" END END [...] Thanks, Dylan On Fri, Jan 10, 2025 at 11:10 AM Richard Greenwood < richard.greenw...@gmail.com> wrote: > Hi Dylan, > > Welcome back. Why do you think the issue is related to the use of > overviews and not something else? > > Rich > > On Fri, Jan 10, 2025 at 10:50 AM Dylan Beaudette via MapServer-users < > mapserver-users@lists.osgeo.org> wrote: > >> Thanks Scott, >> >> I tried that: md5sums on the GeoTiffs and diff on the .map files confirms >> that they are identical. >> >> The only difference between these two systems is the version of Mapserver. >> >> MapServer version 7.2.2 OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ >> SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS >> SUPPORTS=RSVG SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER >> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT >> SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS >> SUPPORTS=GEOS SUPPORTS=PBF INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL >> INPUT=SHAPEFILE >> >> MapServer version 7.6.4 OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ >> SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS >> SUPPORTS=RSVG SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER >> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT >> SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS >> SUPPORTS=GEOS SUPPORTS=POINT_Z_M SUPPORTS=PBF INPUT=JPEG INPUT=POSTGIS >> INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE >> >> The newer version is provided via apt: >> cgi-mapserver 7.6.4-2build2 >> amd64 CGI executable for MapServer >> >> Any other leads? >> Thanks! >> Dylan >> >> On Thu, Jan 9, 2025 at 2:45 PM Scott via MapServer-users < >> mapserver-users@lists.osgeo.org> wrote: >> >>> I would do a sanity check first, just to make sure the 2 raster files >>> are truly the same. Try something like: >>> >>> gdalinfo -stats -hist file1.tif >>> gdalinfo -stats -hist file2.tif >>> >>> Then, I would continue with the .map files, to make sure they are the >>> same. Something like: >>> >>> diff serv1.map serv2.map >>> >>> See what falls out. >>> >>> On 1/9/25 13:10, Dylan Beaudette via MapServer-users wrote: >>> > >>> > Hi Everyone, >>> > >>> > I've got identical GeoTiffs and .map files on two servers with varying >>> > versions of Mapserver that is being used as a TMS. Mapserver 7.2.2 is >>> (I >>> > think) correctly using the overviews while Mapserver 7.6.4 is not. >>> > >>> > Here is an example of the same file, tile, and styling applied across >>> > both versions of Mapserver. >>> > >>> > # Mapserver 7.2.2: >>> > >>> https://soilmap2-1.lawr.ucdavis.edu/cgi-bin/mapserv?map=/data1/website/ >>> > ste/ >>> > >>> taxa.map&mode=tile&tilemode=gmap&tile=5+12+5&layer=blue9dylan&type=taxsubgrp&name=typic_xerofluvents&minvalue=5 >>> < >>> https://soilmap2-1.lawr.ucdavis.edu/cgi-bin/mapserv?map=/data1/website/ste/taxa.map&mode=tile&tilemode=gmap&tile=5+12+5&layer=blue9dylan&type=taxsubgrp&name=typic_xerofluvents&minvalue=5 >>> > >>> > >>> > Mapserver 7.6.4: >>> > >>> https://soilmap4-1.lawr.ucdavis.edu/cgi-bin/mapserv?map=/data1/website/ >>> > ste/ >>> > >>> taxa.map&mode=tile&tilemode=gmap&tile=5+12+5&layer=blue9dylan&type=taxsubgrp&name=typic_xerofluvents&minvalue=5 >>> < >>> https://soilmap4-1.lawr.ucdavis.edu/cgi-bin/mapserv?map=/data1/website/ste/taxa.map&mode=tile&tilemode=gmap&tile=5+12+5&layer=blue9dylan&type=taxsubgrp&name=typic_xerofluvents&minvalue=5 >>> > >>> > >>> > It appears to me that the newer version is either ignoring or >>> > interpreting the overviews differently. Each file has an internal >>> tiling >>> > and overview scheme like this: >>> > >>> > >>> ---------------------------------------------------------------------------------- >>> > Band 1 Block=1766x4 Type=Byte, ColorInterp=Gray >>> > NoData Value=0 >>> > Overviews: 883x1262, 442x631, 221x316, 111x158 >>> > >>> ---------------------------------------------------------------------------------- >>> > >>> > Does anyone have a clue about the differences? Is either version in >>> error? >>> > >>> > Thanks, and good to be back on the mailing list after a nearly 15 year >>> > hiatus! >>> > Dylan >>> > >>> > >>> > >>> > >>> > _______________________________________________ >>> > MapServer-users mailing list >>> > MapServer-users@lists.osgeo.org >>> > https://lists.osgeo.org/mailman/listinfo/mapserver-users >>> >>> _______________________________________________ >>> MapServer-users mailing list >>> MapServer-users@lists.osgeo.org >>> https://lists.osgeo.org/mailman/listinfo/mapserver-users >>> >> _______________________________________________ >> MapServer-users mailing list >> MapServer-users@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/mapserver-users >> > > > -- > Richard W. Greenwood > www.greenwoodmap.com >
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