Opened 2 years ago

Last modified 3 weeks ago

#14701 assigned enhancement

[Patch] Copying relations needs Yes/No confirmation

Reported by: mboeringa Owned by: simon04
Priority: normal Milestone: 19.04
Component: Core Version:
Keywords: relation duplicate confirmation Cc:


This is an enhancement request based on my own and others experience and also documented in Jochen Topf's issue tracker concerning the multipolygon fixing effort (see

The problem is that it is to easy to accidentally copy relations, and this happens especially with multipolygon relations where novice JOSM users attempt to add new members. As a consequence, multiple stacked multipolygons are created, with sometimes more than a dozen copies having different counts of member ways. This is undesirable and difficult to clean up.

What likely happens is that instead of choosing "Modify relation", users accidentally click "Copy relation". This buttons sits right next to the button for modifying a relation. This means that if people accidentally hit it while intending to modify an existing relation, they may create a new relation without even knowing it, as it will have all the members and properties of the original and thus appear as the original to be modified. When they subsequently upload the changes, they will have created a copy instead of having modified the original.

It would be good if JOSM somehow warned for this type of (accidental) misusage in the interface.

I therefor propose an absolute minimal change to JOSM that is likely to minimize to chance of this happening accidentally: add a blocking modal dialog with the question

"Are you sure you want to copy an existing relation? Yes/No".

to the "Copy relation" button before opening the relation editor. This will make novice users aware of the fact they are copying an existing relation instead of modifying it.

Attachments (2)

2019-01-12-180907_459x217_scrot.png (10.0 KB) - added by simon04 3 months ago.
14701.patch (2.4 KB) - added by simon04 3 months ago.

Download all attachments as: .zip

Change History (12)

comment:1 Changed 2 years ago by stoecker

Milestone: 17.05

comment:2 Changed 2 years ago by Don-vip

Milestone: 17.0517.06

comment:3 Changed 22 months ago by Don-vip

Milestone: 17.0617.07

comment:4 Changed 21 months ago by Don-vip

Milestone: 17.07

Changed 3 months ago by simon04

Changed 3 months ago by simon04

Attachment: 14701.patch added

comment:5 Changed 3 months ago by simon04

Milestone: 19.01
Owner: changed from team to simon04
Status: newassigned
Summary: Copying relations needs Yes/No confirmation[Patch] Copying relations needs Yes/No confirmation

Maybe restrict to type=multipolygon?

comment:6 Changed 3 months ago by simon04

Keywords: relation duplicate confirmation added

comment:7 Changed 3 months ago by simon04

Milestone: 19.0119.02

Discussion needed, new i18n strings involved → 19.02

comment:8 Changed 2 months ago by Don-vip

Milestone: 19.0219.03

comment:9 Changed 6 weeks ago by GerdP

Last edited 6 weeks ago by GerdP (previous) (diff)

comment:10 Changed 3 weeks ago by Don-vip

Milestone: 19.0319.04

Modify Ticket

Change Properties
Set your email in Preferences
as assigned The owner will remain simon04.
as The resolution will be set.
to The owner will be changed from simon04 to the specified user.
The owner will change to mboeringa
as duplicate The resolution will be set to duplicate.The specified ticket will be cross-referenced with this ticket

Add Comment

E-mail address and name can be saved in the Preferences.

Note: See TracTickets for help on using tickets.