josm(1) Java OpenStreetMap Editor




JOSM is an editor for OpenStreetMap written in Java 7.

OpenStreetMap is a project aimed squarely at creating and providing free geographic data such as street maps to anyone who wants them. It allows you to view, edit and use geographical data in a collaborative way from anywhere on earth. The project was started because most maps you think of as free actually have legal or technical restrictions on their use, holding back people from using them in creative, productive or unexpected ways.


-h, -?, --help
Show help
Standard X geometry argument
Download the bounding box
Download the location at the url (with lat=x&lon=y&zoom=z)
Open file (any file type that can be opened with File/Open)
Download the bounding box as raw gps
Select with the given search
Do [not] launch in maximized mode
Reset the preferences to the default
Change preferences according to the XML file
Set preference key to value
Set the language
Display the JOSM version
Print debugging messages to console
Disable access to the given resource(s), separated by comma


The following options can be set by using Java system properties (i.e. -Dkey=value passed to java, or specified inside JAVA_OPTS).
Set the JOSM preferences directory.
Set the JOSM user data directory.
Set the JOSM cache directory.
Relocate all 3 directories to homedir. Cache directory will be in homedir/cache. Default is ~/.josm/.


Specify an alternate Java environment.
Specify Java options. For example, to use a HTTP proxy server with this program, set this environment variable to something like JAVA_OPTS=-Dhttp.proxyHost=yourProxyURL before starting josm.


JOSM was originally designed and coded by Immanuel Scholz, and is now maintained by the OpenStreetMap community.

The current JOSM maintainer is Dirk Stöcker. A lot of administration work is done by Paul Hartmann and Vincent Privat.

Major code contributions from (in alphabetical order):

Stefan Breunig David Earl Gabriel Ebner Dave Hansen Paul Hartmann Karl Guggisberg Matthias Julius Alexei Kasatkin Jiri Klement Ulf Lamping Simon Legner Raphael Mack Upliner Mikhalych Vincent Privat Frederik Ramm Dirk Stöcker

Many minor contributions and patches by others; see SVN history at for details. Use "josm-dev AT" to contact still active authors. The logo has been designed by Ilya Palikov.

This manual page was initially written by Andreas Putzo <[email protected]>, for the Debian project (but may be used by others).