Talk:Level0

Delete relation

Is it possible to delete a relation using the editor?--Jojo4u (talk) 12:35, 5 October 2016 (UTC)

Yes, simply add "-" before its header, so it looks like "-relation 1234". Zverik (talk) 13:07, 5 October 2016 (UTC)

Note: this deletes the relation object, along with all its tags and members (but the objects referenced by the members are kept as is).

If you just intend to remove a member from an existing relation, prefix a "-" in front of this indented member in the relation (such as " -wy 12345678" or " -nd 1234567890"). Here also this will only remove the membership to the relation, not the actually referenced object which is kept as is (unless you edit it separately in its own entry).

The same applies when you remove a node from a way: make sure you keep at least 2 nodes in the way (otherwise the way will be non-sense and should not validate), and the referenced nodes may be left as is, without any meaningful tag, i.e. left as an orphan if it's not referenced at least by another way or relation (the validator should alert you for such orphan nodes).

Nodes could be left also with non-meaningful tags (such as only name(s), description, source, note(s), or ref(s), or population) but no geographic classification tag to describe an actual object (place=*, highway=*, building=*, man_made=*, and so on): they are also orphan in this case. I'm not sure that Level0 actually checks all these cases. — Verdy_p ^(talk) 14:42, 5 October 2016 (UTC)

Not exactly right: to delete a relation member or a way node, remove its line from the relation definition. "-" is for removing objects from the OSM database. --Zverik (talk) 14:59, 5 October 2016 (UTC)

Tutorial: How to add a node at a given Y, X

We can put a node at a given Y, X, which not many other editors will permit.

Here are the exact steps to simply put a node even without any tags, at an exact latitude and longitude using Level0 !:

1. Visit http://level0.osmz.ru/
2. Log In
3. Don't worry about the map at the right, or the textbox on top of it.
4. In the vast unnamed giant box that takes up 70% of the entire screen, paste e.g.,

   node : 24.123456, 120.678901

   being very careful to put latitude first, and hit ENTER on your keyboard.
5. Now fill in the "Changeset Comment: Buried treasure lies at these exact coordinates!", and press "Upload to OSM"!
6. See "Changeset 99988877777 was uploaded successfully." Any by clicking that, you can now edit that node in whatever editor you choose:

How to edit the node I just created, in a different editor?

1. Click the Changeset link we just obtained above.
2. You will see "Nodes (1) 11074623260, v1", and a little orange dot near the center of your screen. Focus your eyes on it. (At least easy in non-crowded rural areas.)
3. Click "Edit" in the upper left of the screen, the usual way to e.g., enter iD.
4. The orange dot has turned into a upside-down teardrop. Click it.
5. Add some tags... and Save just like you usually do in iD.

How to delete a mistaken node insertion

If above when creating your node you put longitude first (X, Y, instead of Y, X), you risk creating a point so far near the poles that iD just can't reach it. Panic... How to delete that node?

1. Put the URL of that node, e.g.,

   https://www.openstreetmap.org/node/11074591288

   into the "URL or group id" box, and hit ENTER on your keyboard.
2. See

   node 11074591288: -87.7696390, 42.1667310

   in the aforementioned giant box. Put a "-" in front of it:

   -node 11074591288: -87.7696390, 42.1667310

3. Now fill out "Changeset comment: Man, I blew it! I was so stupid." and click the "Upload to OSM" button.
4. Voila, you will see "Changeset 139163343 was uploaded successfully."
5. Click it to double check you that you have successfully removed the bad node. That's what the crossed out item means: gone.

Jidanni (talk) 07:37, 29 July 2023 (UTC)