![]() ![]() As this is taken from the GPS signal, it will always be available. You should always have an Ordnance Survey paper map and baseplate compass when exploring the great outdoors.Continued use of GPS running in the background can dramatically decrease battery life.Please ensure your Location Services are turned on.OS Locate has been updated to provide even greater peace of mind by providing accurate altitude information. In addition, you will find simple yet comprehensive guides on how to use eastings and northings.OS Locate – know where you are.OS Locate is a complementary tool for Ordnance Survey paper maps. For those who are keen to learn more about maps and navigation, the ‘About’ button hosts a wealth of information including hints and tips and a guide to map reading. Use the handy digital compass to take your bearings – always ensuring you are on the right track. The ‘Share’ button allows you to connect with friends and family via messaging and social media – let them know where you are, how your adventure is progressing and what time you will be home. No mobile signal? No problem OS Locate does not require a mobile signal to function – the inbuilt GPS system can be relied upon, even in the most remote areas.Simply download the app and switch on your device’s location services (Settings – Privacy – Location services).OS Locate is packed with additional features. ![]() If you have lost your bearings or simply would like a little reassurance, OS Locate is the ideal companion for all enthusiasts of the great outdoors.The app converts GPS location readings from your mobile phone to Ordnance Survey National Grid references, enabling you to determine precisely where you are on an Ordnance Survey map. Used alongside your Ordnance Survey map, OS Locate is a fast and highly accurate means of pinpointing your exact location on the map, anywhere in Great Britain. Find our more about transformation software.Make the most of your adventures in the great outdoors with OS Locate. Our Grid InQuestII software transforms between the ETRS89 (WGS84) and OSGB36 National Grid coordinate systems. The map reference conversion spreadsheet (xlsm) will help convert between full national grid references and map tile references that use the 100km square letters. Scale factors, convergence and t-T are included in the spreadsheet but are not covered in the guide. ![]() If you need transformation accuracy better than the 3 metres, you should use OSTN15 and OSGM15 instead of the simple transformation in the spreadsheet. It explains the limitations of the type of datum transformation included in the spreadsheet, which you should bear in mind. Our guide to coordinate systems in Great Britain (PDF) acts as the user manual for some of the calculations you can perform using the spreadsheet. Reformat latitude and longitude coordinates between:.between WGS84 and OSGB36 with an accuracy of about 3 metres. Perform simple ("Helmert" style) coordinate transformations.Convert latitude and longitude coordinates to cartesian XYZ coordinates and vice versa.Compute local scale factor and grid convergence at any point on the grid, and compute t-T and true azimuth between any pair of points on the grid.Project latitude and longitude to grid eastings and northings for any Transverse Mercator map projection, including the Ordnance Survey National Grid – and vice versa.It includes a full set of Transverse Mercator projection functions, so you can easily: You can carry out common calculations with our coordinate calculations spreadsheet (xls). ![]()
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