Allows users to download, edit, and upload OSM data in ArcMap, and/or create feature services based on OSM data in ArcGIS Server ArcGIS now has the ability to import and export OSM data via a free add-in for ArcMap as well as an extension for ArcGIS Server 10 and 10.1. The add-in was released by Esri in July 2010. It is free open source, hosted on GitHub and under the Apache License. To use the ArcGIS Editor for OSM, you must first have ArcGIS Desktop installed. After installing ArcGIS Desktop, download the extension, and follow instructions for installation. There are many tools in the ArcGIS Editor for OSM toolbox, but the two most oft-used ones are for 1) Downloading from OSM and then 2) Uploading edits back to OSM (see the Editor's Getting Started documentation). What happens in-between is editing the downloaded data. Users can leverage the many editing and analysis tools available in ArcGIS Desktop to do their editing or run analysis/use the downloaded data. Editing tools such as parcel editing, topology tools, and network analysis provide ways to powerfully edit and use the data. Upcoming functionality (version 2.0) will also provide a feature service capability, such that ArcGIS Server Feature services can be easily created and support editing from a variety of clients. See What's Next for ArcGIS Editor for OSM for details. In ArcGIS Desktop 10, you can also Openstreetmap as a basemap to the map document, which is useful for seeing what work has already been done in an area before you download and edit the data from OSM. Using the Bing aerial imagery basemap in ArcGIS Desktop to derive vector data for OSM is possible (although legally may not be endorsed by Esri). See the Bing page for details. Source.