In JOSM I need to merge the changed layer with the existing data layer. My question is why I need a merge. What will happen if I upload layer without merging?

asked 27 Jan, 09:34

_partha's gravatar image

_partha
26557
accept rate: 0%

edited 27 Jan, 11:29

aseerel4c26's gravatar image

aseerel4c26 ♦
32.0k16238549

is there a special reason for the tag josm_8969?

(27 Jan, 10:35) aseerel4c26 ♦

You do not need to technically merge your new data layer to a data layer which you have downloaded from the server. All your new data in your layer will be merged to the main database on upload. Note that by "merged" I mean (in simple words) that e.g. if you draw a new street where there is already a street in the main database, then you will have two streets placed on top of each other while being not connected to each other. Since we usually want no duplicate object and want a connected street network (for routing), you usually would want to avoid this.

Usually you rather want to first download data from the server, then edit this layer and then upload it.

An option is this (which you possibly described in your question): You download the existing data, start a new data layer and do your additions, merge both layers, connect streets (and similar objects) and check that you did not create any duplicated objects, and then upload the merged layer.

permanent link

answered 27 Jan, 10:35

aseerel4c26's gravatar image

aseerel4c26 ♦
32.0k16238549
accept rate: 17%

Your answer
toggle preview

Follow this question

By Email:

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

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "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:

×509
×75
×27
×2

question asked: 27 Jan, 09:34

question was seen: 388 times

last updated: 27 Jan, 11:29

powered by OSQA