tag:blogger.com,1999:blog-179325926611299376.post3080469129562091391..comments2023-09-16T13:46:11.986+01:00Comments on Open Maps: OS Data part 3Chris Hillhttp://www.blogger.com/profile/02951528269028953589noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-179325926611299376.post-58299642557301351992010-04-20T21:19:43.306+01:002010-04-20T21:19:43.306+01:00Maybe the difference between OSGB36 and OSTN02? Al...Maybe the difference between OSGB36 and OSTN02? Although I think that difference is sub-metre.<br /><br />If the difference is about 100m to the east in London then may well be due to the difference between the datums used by OSGB36 and WGS84.feOlliehttps://www.blogger.com/profile/16101185101622046547noreply@blogger.comtag:blogger.com,1999:blog-179325926611299376.post-4005419496179310572010-04-19T09:52:40.660+01:002010-04-19T09:52:40.660+01:00Thanks for your comment Andrew. I have applied a t...Thanks for your comment Andrew. I have applied a transform from the projection Ordnance Survey use to the WGS84 projection that OSM use. If you think there is another step or something else I need to do I would be very keen to know.Chris Hillhttps://www.blogger.com/profile/02951528269028953589noreply@blogger.comtag:blogger.com,1999:blog-179325926611299376.post-20124187022215971752010-04-18T22:57:49.849+01:002010-04-18T22:57:49.849+01:00Have you allowed for the difference between the OS...Have you allowed for the difference between the OS spheroid and WGS84?Andrewnoreply@blogger.com