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Slippy-map is blurry in Chrome on Linux #5338

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openstreetmap-trac opened this issue Jul 23, 2021 · 4 comments
Closed

Slippy-map is blurry in Chrome on Linux #5338

openstreetmap-trac opened this issue Jul 23, 2021 · 4 comments

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@openstreetmap-trac
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Reporter: brian[at]ppcis.org
[Submitted to the original trac issue database at 8.59am, Wednesday, 29th July 2015]

Using Chrome version 44.0.2403.107 (64-bit) on Ubuntu Linux.

When browsing the regular slippy map, the tiles appear blurry. When I change the zoom level, they are clear for a split second, but then it looks like anti-aliasing is performed, and the map blurs.

Here's an example of the blur:
[[Image(http://i.imgur.com/YWapoO4.png)]]
The left hand part of the image is the slippy map. The right hand part is that same tile, after a right click and "Open image in new tab". It is much clearer, despite appearing to be at the same scale.

The image is simply a cropped screenshot, with the tile's browser window being positioned above the slippy map on screen.

It doesn't matter which render I choose in the layers menu, they all behave like this. In Firefox, the slippy map's quality is much, much better.

@openstreetmap-trac
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Author: TomH
[Added to the original trac issue at 8.25pm, Thursday, 30th July 2015]

Seems fine to me in chromium, but in any case if there is a problem it will in Leaflet, not in our code. They have an issue tracker at https://github.com/Leaflet/Leaflet/issues.

@openstreetmap-trac
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Author: pnorman
[Added to the original trac issue at 8.54pm, Thursday, 30th July 2015]

A likely cause is browser zoom is on and almost 100%. That or something specific to your setup.

@openstreetmap-trac
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Author: iandees
[Added to the original trac issue at 8.54pm, Thursday, 30th July 2015]

You might also want to check that Chrome's zooming isn't enabled. Check your URL bar for a little magnifying glass on the right side or go to the View menu and pick "Actual Size".

@openstreetmap-trac
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Author: brian[at]ppcis.org
[Added to the original trac issue at 9.07pm, Thursday, 30th July 2015]

It isn't the browser's own zoom feature. That's actually very difficult to accidentally activate on OSM, since its shortcut is overridden.

I'd never heard of Leaflet, but I suppose I'll go there and log this instead.

Edit: Before blaming the browser, bear in mind that the right half of the image is also a Chrome browser window, just showing the tile directly instead of through the map application.

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