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Barry Hunter over at the Google API discussion list has pointed that my conversion routine is not wholly accurate. I am only converting OSGB “grid refs” not the full OSGB36 to latitude and longitude. If I ever get time I will use the OS spreadsheet calcs to implement a full conversion. I thought I might […]


I have posted up a link (look under the ‘Pages’ heading) to a javascript class I have written called GeoPosition. This will convert coordinates between OSGR and WGS84 formats. WGS84 is the format google maps uses to plot points. Here you are. Code fix – The function calculateZoomLevel will now set the zoom level correctly […]