JOSM

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JOSM
Screenshot of JOSM
Author: Immanuel Scholz, Dirk Stöcker and other contributors.
Website: https://josm.openstreetmap.de
Version: 7643 (2014-10-21)
License: GPL
Platform: win ; linux ; macosx

Offline highly expandable map editor

JOSM is the "Java OpenStreetMap Editor", a desktop application originally developed by Immanuel Scholz and currently maintained by Dirk Stöcker. Its homepage is located at josm.openstreetmap.de.

Although it has a relatively steep learning curve, JOSM is used by experienced editors thanks to its plugins and stability.

Install

You can download JOSM from the JOSM homepage either by browsing there or by clicking one of the following:

JOSM download button (josm-tested.jar)

For more details see JOSM/Installation.

Usage

JOSM screenshot, editing in Cleveland, Ohio, USA

There are other editors for OpenStreetMap data, like iD or Potlatch 2. JOSM is a feature-rich editor with an interface which can seem complex at first. Have a look at the comparison of editors if you're still unsure which editor to choose.

JOSM/Guide A guide taking you through getting started, downloading some data, basic editing and more advanced editing features. It is intended for beginners to read the guide from the beginning. This is a descriptive guide providing a simple introduction. Some details are intentionally left out.
JOSM Help This help manual should provide more exhaustive in-depth explanations of each JOSM feature. It is intended to be used as a reference manual, rather than reading from end-to-end. It is also accessible by pressing F1 within the application (context sensitive help)
Video Tutorials

Some JOSM videos as part of the Steve Coast's video series

Series of short JOSM tutorials by Russell Nelson: