[email protected] writes:
> @Akkana: I'm honored to be mentioned on your blog! 
> 
> And I'm glad the video was of use. When I made it, I thought the topic was 
> pretty escoteric. On the other hand, if there's an app that handles overlays 
> as gracefully as OsmAnd, with that slider bar allowing you to shift between 
> layers, I haven't seen it.

I agree. OsmAnd handles overlays beautifully, especially being able to
integrate two different rasters with the vector map like you show in
the video, and to do it all offline.

A Thompson writes:
> This might be alluding to the time I posted my notes on this here 
> <https://groups.google.com/d/msg/osmand/WNTTAI_aCC8/Qk82yzfxBQAJ>

In fact, I did see that posting and found it very helpful (though I
needed a few more details you omitted), and should have credited
you. I've added that link to my blog post.

> Since then, I've 
> successfully loaded tile maps into OsmAnd skipping the creation of the 
> sqlite file: just putting the directory hierarchy of .png tiles into a 
> suitably named directory in the "tiles" directory of OsmAnd makes them 
> available as a map source. [ ... ]
> Does anyone know if creating a single sqlite file is beneficial? Just 
> having the directory structure of .png tiles is easier to make, edit, and 
> extend.

I'd like to know that too. The single .sqlitedb file seems cleaner and
easier to copy, but I wondered if it might be slower or more memory hungry.

[email protected] writes:
> If I understand your post and link, you've worked out a way to produce an 
> overlay entirely within QGIS. Yes? If so, I think that's significant, 
> assuming, as you suspect, there's no big advantage to converting to a single 
> sqlite file. Is sqlite more compact?

There's a QGIS plugin called QTiles that's supposed to produce
tiles, but it didn't work for me. But gdal2tiles can convert a geoTIFF
to a tile directory that works in HTML/JavaScript tiled viewers, and
I bet it would work in OsmAnd too.

I notice that QGIS's Save Layer dialog offers SQLite as a format, but
I haven't tried it; "SQLite" could be anything.

        ...Akkana

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