Mark Gray's diary

Recent diary entries

Prototype of newbie-safe semi-automated edits available

Posted by Mark Gray on 24 August 2009 in English (English)

OpenStreetMap Quick Check:

"A quick and easy way to help improve the OpenStreetMap database"

If you can look at a satellite photo and answer a simple question, you can help.

The first example project is categorizing residential road endings. This system could also be used for many other purposes.

Feel free to edit/discuss the wiki page for this project: OSM tile viewer working well on Windows and Windows Mobile

Posted by Mark Gray on 2 February 2009 in English (English)

I have been using my OSM viewer for a while now both on the desktop and on my Windows Mobile phone. The two versions have interface differences, but share much of the code.
The mobile version uses my phone's GPS for several things:
centering the map
recording where I have been in GPX files
uploading my current location to my web server so my wife can see where I am

It can also download my wife's location so I can see when to head downstairs to be picked up.

I am planning to package this software for non-programmers to try on their own desktop and/or mobile device, I just need to think of a good name for it... OSM tile viewer

Posted by Mark Gray on 24 July 2008 in English (English)

I have been working on an OSM tile downloader/cacher/viewer application in It works pretty well now and the source is available through subversion:

I post about this program in a thread on the MapWindow forum at:,9197,9477#msg-9477

In addition to caching and displaying tiles, it overlays GPX files (tracks and waypoints) on the map.

Interested in making a MapWindow OSM plugin

Posted by Mark Gray on 12 June 2008 in English (English)

Ideas for a new plugin that will allow MapWindow (open source .Net GIS) to communicate with OSM are being posted at:,9197,9217