[gdal-dev] MBTiles generation docs question

[jratike80]

Hi,

I am adding some related links:
- Open GDAL ticket (where you already added your comment)
https://github.com/OSGeo/gdal/issues/3126
- Question in gis.stackexchange
https://gis.stackexchange.com/questions/376827/gdaladdo-zoom-level-not-supported

The issue is that at the moment GDAL does not handle MBTiles with zoom
level>22. That corresponds roughly to pixel size of 11 millimeters. I
checked that your image is about 582 meters in height and with 68686 pixels
it makes a pixel size of  8-9 millimeters if I calculated it right.

BTW. I checked the distance in meters with ogrinfo trick
ogrinfo -dialect sqlite -sql "SELECT ST_Distance(ST_GeomFromText('POINT
(130.4572338 33.0115493)'),ST_GeomFromText('POINT (130.4572338
33.0063053)'),1)" foo.jml

where foo.jml can be any existing ogr source. 

-Jukka Rahkonen-



Evert Etienne (SITEMARK) wrote
> Hey,
> 
> Your zoom level explanation makes sense, thanks.
> 
> I should have included the gdalinfo in my previous mail, apologies.
> 
> ```
> Driver: GTiff/GeoTIFF
> Files: output.tif
> Size is 88543, 68686
> Coordinate System is:
> GEOGCRS["WGS 84",
>     DATUM["World Geodetic System 1984",
>         ELLIPSOID["WGS 84",6378137,298.257223563,
>             LENGTHUNIT["metre",1]]],
>     PRIMEM["Greenwich",0,
>         ANGLEUNIT["degree",0.0174532925199433]],
>     CS[ellipsoidal,2],
>         AXIS["geodetic latitude (Lat)",north,
>             ORDER[1],
>             ANGLEUNIT["degree",0.0174532925199433]],
>         AXIS["geodetic longitude (Lon)",east,
>             ORDER[2],
>             ANGLEUNIT["degree",0.0174532925199433]],
>     ID["EPSG",4326]]
> Data axis to CRS axis mapping: 2,1
> Origin = (130.457233786582947,33.011549334631184)
> Pixel Size = (0.000000076347339,-0.000000076347339)
> Metadata:
>   AREA_OR_POINT=Area
> Image Structure Metadata:
>   INTERLEAVE=PIXEL
> Corner Coordinates:
> Upper Left  ( 130.4572338,  33.0115493) (130d27'26.04"E, 33d 0'41.58"N)
> Lower Left  ( 130.4572338,  33.0063053) (130d27'26.04"E, 33d 0'22.70"N)
> Upper Right ( 130.4639938,  33.0115493) (130d27'50.38"E, 33d 0'41.58"N)
> Lower Right ( 130.4639938,  33.0063053) (130d27'50.38"E, 33d 0'22.70"N)
> Center      ( 130.4606138,  33.0089273) (130d27'38.21"E, 33d 0'32.14"N)
> Band 1 Block=88543x1 Type=Byte, ColorInterp=Red
>   Mask Flags: PER_DATASET ALPHA 
> Band 2 Block=88543x1 Type=Byte, ColorInterp=Green
>   Mask Flags: PER_DATASET ALPHA 
> Band 3 Block=88543x1 Type=Byte, ColorInterp=Blue
>   Mask Flags: PER_DATASET ALPHA 
> Band 4 Block=88543x1 Type=Byte, ColorInterp=Alpha
> ```
> causing the error mentioned previously
> ``gdal_translate output.tif output.mbtiles -of MBTILES
> Input file size is 88543, 68686
> ERROR 1: Could not find an approproate zoom level`
> 
> 
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