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

I am using the measurement plugin for JOSM. When using the option select everything, every road appears as selected and by using the measurement option I can obtain path length and selected area. Does this selected area displayed refers to the area of the whole osm map or just to the roads (and other ways), which are the elements that are shown as selected?

asked 11 Apr '16, 16:58

Fa__'s gravatar image

accept rate: 0%


The area displayed by the "measurement" plugin is the sum of the areas of every closed way in your selection. That means that if two areas overlap (say, a pond inside a park), the overlapping area gets counted twice. It also means that areas formed by multiple ways (such as a city boundary defined by several roads) aren't counted at all.

permanent link

answered 11 Apr '16, 18:44

Carnildo's gravatar image

accept rate: 40%

I don't want to hijack this thread but I use the measurement tool quite a bit but cannot seem to find a way to switch the area units from hectares to acres. Can you help?

(12 Apr '16, 00:26) AlaskaDave

@AlaskaDave There is a ruler symbol on the bottom of the map. By clicking on it you change the units. A message explaining the change will appear. There are several units that can be chosen, click on the ruler until the one you are looking for appears.

(12 Apr '16, 08:39) Fa__

@Carnildo Thank you for your answer. Is there a way to avoid counting twice overlapping areas?

(12 Apr '16, 08:46) Fa__

@Fa, Thank you. That control is fairly well hidden LOL.

(12 Apr '16, 11:03) AlaskaDave

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: 11 Apr '16, 16:58

question was seen: 3,814 times

last updated: 12 Apr '16, 11:03

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