Tiles alignment issue when displaying .mbtiles file

Federico shared this problem 6 months ago
Closed

When .mbtiles files are loaded as offline maps, the border between tiles is not seamless, but there is a slight overlap.
I have prepared a test pattern and loaded it as two adjacent tiles into a .mbtiles file to show the problem.

The example shows a vertical border, but horizontal borders behave the same.

In the screenshot, you can see a vertical overlapping line in the left part of the screen.

I also attached the test file.

Tested on Locus Map for Android v4.30.1

Replies (2)

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Hello Federico,

thank you for this bug report. As usually, hunting a pixels won't be easy. I've added this to my TODO list on next months and let you know once there will be any progress. Thank you.

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Hello Federico,

I'm testing it and getting identical result like you, even with the latest Locus Map version.

As I see, this "issue" is visible when the layer is scaled up to 500% and more. It may be a rounding error in the map system or just precission limits of the Android drawing system. Anyway, I consider problem as very minor, almost not noticable and won't invest more time into it. Thanks for understanding.

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