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| Authors: | Immanuel Scholz, Dirk Stöcker and other contributors. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| License: | GNU GPL (free of charge) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Platforms: | Windows, Linux, and macOS | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Version: | 19265 Changelog (2024-12-04) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Languages: | Arabic, Asturian, Bulgarian, Catalan, Valencian, Czech, Danish, German, Greek, English, Canadian English, Australian English, British English, Spanish, Estonian, Basque, Finnish, French, Galician, Hungarian, Indonesian, Italian, Japanese, Khmer, Norwegian Bokmål, Dutch, Polish, Portuguese, Brazilian Portuguese, Russian, Slovak, Swedish, Turkish, Ukrainian, Uzbek, Simplified Chinese, and Traditional Chinese | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Website: | https://josm.openstreetmap.de | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Source code: | https://josm.openstreetmap.de/svn/trunk | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Programming language: | Java | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Offline highly expandable map editor |
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JOSM (Java OpenStreetMap Editor) is a desktop application for editing OpenStreetMap, the most powerful and complicated out of available editors. Its homepage is located at josm.openstreetmap.de.
JOSM is a feature-rich editor with an interface which can seem complex at first. Although it has a relatively steep learning curve, JOSM is popular among experienced editors thanks to its plugins and stability. In 2023 it was used by 7.2% users, but they made 56.4% of all edits.
There are other editors for OpenStreetMap data, such as iD and Potlatch. If you are unsure which editor to use, see the Comparison of editors article.
Installation
JOSM can be downloaded from the JOSM homepage. Many Linux distributions offer JOSM packages. See JOSM/Linux. It can be run as a local Java installation or with Java WebStart, which causes the latest version to be fetched over the Internet each time the program is run. Java version 1.8, minimum, is required to run JOSM as of 2017. The site security certificates for JOSM WebStart are invalid and will generate multiple warnings during startup, requiring the user to accept exceptions several times before the program is ready to use.
Usage
JOSM/Guide
The Guide will take 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.
See also
JOSM/FAQ
Will cover common questions.
Video Tutorials
- Main article: Video tutorials#JOSM video collection
Several good tutorials have been created and shared by the Humanitarian OpenStreetMap Team via YouTube:
JOSM Basics - August 31, 2019Help with JOSM
The JOSM 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)
JOSM Validator
- Main article: JOSM/Validator
Advanced editing
JOSM is capable of advanced and efficient editing, up to and including automated edits and imports.
 | Using advanced functions in JOSM such as search and replace without properly reviewing every single one is considered an automated edit and therefore must follow the automated edits code of conduct guidelines |
History
Originally developed by Immanuel Scholz and currently maintained by Dirk Stöcker.
See also
- JOSM/Plugins – for optional extensions that can be downloaded and installed in JOSM.
- JOSM/Presentations – for talks about JOSM given at various conferences.
- JOSM/ subpages
- Comparison of editors
- iD – default editor (online) on osm.org
- RapiD – maintained fork of iD
- Potlatch 3
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