Please use the issue tracker to report bugs, details on the website. You may wish to try with jpg (just to verify that tile can be generated at all). And then look at the different png encoding supported (we have several implementations you can choose).
On Thu, May 30, 2019 at 02:15 Bill Sample <bill.sam...@hotmail.com> wrote: > Serving WMTS topographic and FAA Sectional Charts on battery powered > Raspberry Pi to support offline mountain search and rescue flights of > drones in Colorado. The USGS Imagery Topo JPG tiles work perfect. The FAA > Sectional Chart PNG tiles are often corrupted when displayed. Areas of > tiles within zoom levels will be correct and other areas corrupted. Same > tiles correct and corrupted each session. Attempted to clear cache between > sessions; not sure I succeeded. Tiles show same corruption in Layer > Preview – OpenLayers. Corruption may be in color pallet as features are > there but in very different colors. > > > > Using Global Mapper to create MBTiles as input for GeoServer. Inspection > of MBTiles with DB Browser for SQLite shows no corruption of the PNG in the > MBTiles file. MBTiles within SQL DB are byte for byte the same as the > source tiles. > > > > Have captured and enclosed in email a source tile and corrupted WMTS > served tile. Also ImageMagick dumps of the PNG chunks. > > > > Tiles come in in EPSG:3857 and WMTS serves the same. > > > > Pi 3B is running Raspbian 9 (stretch). GeoServer 2.15.0. GeoWebCache > 1.15.0. Apache Tomcat 8.5.39. Not able to find MBTiles extension version > in GeoServer. Should have been the same version as GeoServer. Downloaded > both on the same day around first of April. > > > > Is there a way to configure GeoServer/GeoWebCache to pass through the > tiles without changing them? Is it possible that GeoServer has a bug? > > > > Use of the FAA Sectional Chart is not critical to our SAR operations so no > urgency. > > > > With 90 SAR missions a year in our county and 1,400 state wide in Colorado > the ability to fly drones on searches with topographic maps over aerial > photos from an offline map server is a game changer for us. It allows us > to send drones to areas that are dangerous for ground teams and decreases > our time to locate the subject. GeoServer will be saving lives and > reducing the time injured or lost subjects spend out in adverse > conditions. SAR in Colorado is done at no cost to the subjects and is > performed by volunteers. The majority of funding is from donations so > keeping equipment cost down is important. My heartfelt thanks to the > GeoServer Community for making this essential tool available to us without > cost. > > > > Thanks for any assistance on the PNG issue. > > > > Bill Sample > > Chaffee County Colorado Search and Rescue South > _______________________________________________ > Geoserver-users mailing list > > Please make sure you read the following two resources before posting to > this list: > - Earning your support instead of buying it, but Ian Turton: > http://www.ianturton.com/talks/foss4g.html#/ > - The GeoServer user list posting guidelines: > http://geoserver.org/comm/userlist-guidelines.html > > If you want to request a feature or an improvement, also see this: > https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer > > > Geoserver-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geoserver-users > -- -- Jody Garnett
_______________________________________________ Geoserver-users mailing list Please make sure you read the following two resources before posting to this list: - Earning your support instead of buying it, but Ian Turton: http://www.ianturton.com/talks/foss4g.html#/ - The GeoServer user list posting guidelines: http://geoserver.org/comm/userlist-guidelines.html If you want to request a feature or an improvement, also see this: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
