Tiles are too small on high dpi devices

[osmdroid]

Tiles are too small on high dpi devices

[dawidhyzy]

bump

[xserxses]

+1

[michalkachel]

+1

[renepeinl]

+1

[devemux86]

It's worth mentioning that the tile providers have also to publish tiles at higher resolutions / tile sizes in order to be usable at high dpi devices.
e.g. Mapbox provides 'retina' raster tiles for use.
Or else if we try to scale the tile images at the map view, then they can become blurry.

Emux
Cruiser - Atlas

[renepeinl]

Don't you think it is better they would be blurry than being unreadable due to small font size?
You could provide it as an option that can be turned on and off so that the user or developer can decide what's better for him.

[ziem]

I agree with renepeinl.

[legraphista]

There is an easy workaround for this issue:

final float scale = getBaseContext().getResources().getDisplayMetrics().density;
final int newScale = (int) (256 * scale);
String[] OSMSource = new String[2];
OSMSource[0] = "http://a.tile.openstreetmap.org/";
OSMSource[1] = "http://b.tile.openstreetmap.org/";  
XYTileSource MapSource = new XYTileSource(
        "OSM",
        null,
        1,
        18,
        newScale,
        ".png",
        OSMSource
);
map.setTileSource(MapSource);

Hope it helps!

[ToninoTarsi]

The above workaround works and solve big DPI problem but when I try to add an PathOverlay the line is not showing.

[ziem]

Try to disable hardware acceleration in manifest.

[Positronic-Brain]

It might be being drawn somewhere else in the map. I used to experience a similar issue with MyLocationNewOverlay and this workaround, but then I realized the Overlay was being drawn - it was just that it was being drawn somewhere in Antarctica. I documented this in Issue #68 "User location not rendered correctly when using non-standard size tile source"

[GaMsh]

+1

[kurtzmarc]

Please take a look at #81 where we have a potential solution ready for testing.

[kurtzmarc]

I have merged the fix_dpi_scaling branch. Call mMapView.setTilesScaledToDpi(true) to turn on tile scaling. Report all issues to #81.

[trofimchyk]

Hi!
mMapView.setTilesScaledToDpi(true) solved problem with tiles. But what about map markers? They are still small.

[neilboyd]

@trofimchyk please create a new issue for markers

[trofimchyk]

@neilboyd There is no bug with markers. I forgot to make my icons for each dpi. Sorry, my mistake :)

[rpeinl]

Thanks a lot for the fix. I just verified that
mMapView.setTilesScaledToDpi(true)
did work for me as well. Version 4.3 also fixed the issue that setCenter did not center around the coordinates, but made the given coordinates the left upper corner.
Why is there now binary distribution of osmdroid 5.x any more? I just found a sources.jar, but not the "real" jar with compiled classes.

[spyhunter99]

osmdroid >=5.0 is an android archive. I'm not sure why there's such as push back on this. It's the android way to include resource files along with java code. You can still download the AAR on maven central.