1

I've got a list of coordinates in the UK Ordnance Survey grid system e.g. "NZ 27 41" or "NZ 284 449". How do I convert them in QGIS 2.10 to decimal degrees so I can map them in QGIS in WGS84? BTW, is there a way to deal with the spaces in those coordinates?

1

These are OS grid references, to convert them OS coordinates you can use 'ng converter' which is free from here:

http://digimap.edina.ac.uk/webhelp/os/data_information/os_data_issues/ng_converter.htm

Before using 'ng converter' you will first need to do a find and replace operation on the list of grid references to remove the spaces (easy enough in, say, a spreadsheet).

Load the output of the converter into QGIS as a delimited text file with the CRS EPSG:27700. From here the data may be 'saved as' an EPSG:4326 (WGS84 lon/lat) shapefile (or used as it is, converted to EPSG:4326 on-the-fly).

1

I spend a lot of time converting lat long coords, and I actually just do it in excel. It is a little bit slower but you have more control. If you can use the =mid() function to separate hours, minutes, and seconds, then you can use a simple formula to do the conversion. Then just load the excel sheet or csv back into QGIS.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.