NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum

Hi. I am confused with and I don't understand the zoom levels' generation. More precisely - what are the criteria for objects (for example, area objects) to appear or disappear in the zoom levels. For illustration, access the link and so zoom out one step. Many large lakes will disappear while much smaller islands don't. If I repeat the experiment with other apps in the Slippymap (like the Cycle map, Transport map ...) I am getting even more confused. Even just pointing to some related documentation would be much appreciated. Thanks.

asked 04 Dec '13, 11:27

sanser's gravatar image

accept rate: 5%

The features that show on each zoom level are controlled by the stylesheets. For example, the stylesheets controlling the "Standard" layer are found here:

The strange behaviour that you are seeing here is because lakes are only shown from zoom 6. The lower zoom levels (0-5) only show water defined by coastlines. But here one lake has been mapped as a coastline, and the other as a lake (with natural=water tags), which is why one disappears and the other doesn't.

In future, I would expect the zoom 5 to take into account very large lakes, but that's not something that's likely to happen soon. As for the tagging, it's important that people stop tagging large lakes with natural=coastline since that's incorrect.

permanent link

answered 04 Dec '13, 13:19

Andy%20Allan's gravatar image

Andy Allan
accept rate: 28%

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:


question asked: 04 Dec '13, 11:27

question was seen: 2,679 times

last updated: 04 Dec '13, 13:19

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum