Hello, You have the answer at https://github.com/mapbox/mbtiles-spec#utfgrid Two specs. In old days, utfgrid was part of the mbtiles spec directly - mbtiles = contains raster or vector tiles - utfgrid = store in the same scheme (xyz) json blob to be able to make interactive map
Most of the time, when using mbtiles = you create a sqlite file pregenerated and you serve raster/vector tiles and optionally utfgrid using a small server without any mapping logic. The advantage = any hosting can do it. Drawback = Can't refresh on the fly. The alternative approach is to use a web map server that's able to read a geospatial datasource and output from it an image/vector/utfgrid like if it was serve from a mbtiles with yoururl/<z>/<x>/<y>.png (for raster) or yoururl/<z>/<x>/<y>.pbf (for vector) or yoururl/<z>/<x>/<y>.json (for utfgrid) but the data behind behind the scene is not stored in a mbtiles. Advantage = clients libraries (OpenLayers, Leaflet,...) are able to consume raster/vector tiles or utfgrid like if served from static mbtiles. Drawback = special hosting to deploy and use your web map server. Not sure it's enough clear. Regards, Thomas Gratier Le sam. 3 sept. 2022 à 01:05, Scott <pub...@postholer.com> a écrit : > I'm ill equipped to answer your question directly. > > However, as you delve into the world of vector tiles I'd strongly > suggest taking a look a FlatGeoBuf (.fgb). It's an index format > supported by GDAL and MapServer. It's very fast and painless. > > The home page has demo's for openlayers, leaflet and mapbox, using a > single 12GB census data file. Leaflet seems to be the most responsive. > > http://flatgeobuf.org/ > > > > > On 9/2/22 15:22, karsten wrote: > > Hi All, > > For the first time, I am diving into actually using vector tiles and or > > UTF grids on an OpenLayers map. I am confused about UTF grids, > > especially I could not find clear answers whether UTFGrids have been > > completely replaced by MB Tiles or if UTF Grids are now a subset of MB > > Tiles. Posts on the web seem to suggest that UTF grids can be stored > > inside MB Tiles > > < > https://medium.com/@pyin001/utfgrid-and-mbtiles-map-file-decoding-on-android-864487697752>. > > > Note that I am trying to stay outside the Mapbox empire (as much as > > possible) and trying to use GDAL, MapServeretc. > > GDAL can produce MB tiles (but not sure if that includes UTF grid info > > as well) and MapServer can deliver UTF grid via WMS on the fly, but not > > sure how performance is so far ... > > Would anyone have some insights ? > > Thanks > > Karsten Vennemann > > www.terragis.net <http://www.terragis.net> > > > > _______________________________________________ > > 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 >
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