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lutraconsulting / qgis-xyz-tiles

A processing algorithm to generate xyz tiles from map/layer extent.
GNU General Public License v2.0
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mbtiles generated with the tool doesn't work with GeoODK (no images table) #29

Closed Sameme closed 5 years ago

Sameme commented 5 years ago

mbtiles file generated with the tool doesn't work in GeoODK app. The reason is the absence of images table. See error screenshots below 2019-07-18

-- This is how the file composition look like xyz

-- File composition of mbtiles from other sources that work looks like this

xyz2

Any suggested solution to resolve this will be highly appreciated.

Thanks

saberraz commented 5 years ago

This is more like an issue with GeoODK app than this algorithm.

Could you try gdalinfo and the tile and attach the output here? Essentially, if it is readable by GDAL, any other application using GDAL driver should be able to read the file.

christad92 commented 5 years ago

@saberraz thanks for the response. This is not an issue with GeoODK but the file composition of the mbtiles. Even when we try to serve it as a WMTS it fails with the same error that it couldn't find the images table. It works as a layer within QGIS but not across the multiple platforms where we have previously used GDAL generated mbtiles.

saberraz commented 5 years ago

Would it be possible to attach an example file or add the gdalinfo output from the file?

christad92 commented 5 years ago

Here is what the gdalinfo return: image image

saberraz commented 5 years ago

From GeoODK, it appears that they only support vector (???) mbtiles: https://github.com/GeoODK/collect#main-functionality (I guess by "line Layer tiles (MapBox)" they mean vector mbtile).

The XYZ tile generator is for raster mbtiles, which appears not to be supported in GeoODK. Please file a ticket in GeoODK feature request or use https://inputapp.io which is based on QGIS.

christad92 commented 5 years ago

@saberraz GeoODK supports raster mbtiles because we have used these countless times. However, I have tried serving the mbtiles as WMTS file using portable base map server but it still fails with the same error.