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Editorial Team
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Asked: 2026-05-23T15:13:27+00:00

I’m trying to use an offline MBTiles database using Route-Me . To accomplish this,

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I’m trying to use an offline MBTiles database using Route-Me. To accomplish this, I’m using Landez, which in turn depends on MBUtil.

Right now, all I get is a gray screen with the pins in their proper locations. Here’s what gets printed to the console:

initializing memory cache <RMMemoryCache: 0x4e42e50> with capacity 32
Opening database at /Users/chrislong/Library/Application Support/iPhone Simulator/4.3.2/Applications/E53BC885-1B02-4B06-B45B-408EB9A147DE/Documents/MapOpenStreetMap.sqlite
Map contents initialised. view: MapView at 0,0-320,411 tileSource <RMCachedTileSource: 0x4e428b0> renderer <RMCoreAnimationRenderer: 0x4e13dc0>
initializing memory cache <RMMemoryCache: 0x5929930> with capacity 32
Opening database at /Users/chrislong/Library/Application Support/iPhone Simulator/4.3.2/Applications/E53BC885-1B02-4B06-B45B-408EB9A147DE/Documents/MapMBTilestiles.mbtiles.sqlite
Warning: I could not find the column named 'tile_data'.
Warning: I could not find the column named 'tile_data'.
Warning: I could not find the column named 'tile_data'.
Warning: I could not find the column named 'tile_data'.
Map contents initialised. view: MapView at 0,0-320,411 tileSource <RMCachedTileSource: 0x592a400> renderer <RMCoreAnimationRenderer: 0x5925770>

It’s worth noting that the file is named tiles.mbtiles, not MapMBTilestiles.mbtiles.sqlite, and is stored in the root of the bundle, not the Documents folder.

Here’s the code I use to make the mapView and load the database:

CLLocationCoordinate2D center = {50, 50};
self.mapView = [[[RMMapView alloc] initWithFrame:self.view.frame] autorelease];
self.mapView.backgroundColor = [UIColor blackColor];
self.mapView.delegate = self;

NSURL *tilePath = [[NSBundle mainBundle] URLForResource:@"tiles" withExtension:@"mbtiles"];
RMMBTilesTileSource *tiles = [[[RMMBTilesTileSource alloc] initWithTileSetURL:tilePath] autorelease];
[self.mapView.contents removeAllCachedImages];
self.mapView.contents = [[[RMMapContents alloc] initWithView:self.mapView tilesource:tiles centerLatLon:center zoomLevel:0.0 maxZoomLevel:[tiles maxZoom] minZoomLevel:[tiles minZoom] backgroundImage:nil] autorelease];
[self addMarkers];

Route-Me is obviously not reading the file at all; even if I delete the database entirely, I get the same log output. IOW, the problem is probably as a result of Route-Me being unable to find the file. Any help would be appreciated!

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1 Answer

  1. Editorial Team

    Check out – (RMTileImage *)tileImage:(RMTile)tile from MapView->Map->Tile Source

    I was having some issues with sqlite db’s generated by map2sqlite until I changed the line:

    NSInteger y    = pow(2, zoom) - tile.y - 1;

    to:

    NSInteger y    = tile.y;

    I’m using tilemill generated db’s right now, so I haven’t dug into it further, but I’d toss in some debug statements if I were you and look at what tiles its looking for vs what the tile layout in your db is. I think it might have to to do with mbtiles tiling order vs osm’s tiling order.

    — Randy

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