1 Topic by charliebarnes

  • charliebarnes
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  • From: Greater Lincolnshire
  • Registered: 07-09-2008
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Topic: Latitude Longitude calculated from grid reference

When they both fail these two data quality tests seem contradictory?

Latitude Longitude calculated from grid reference 
Grid reference calculated using latitude and longitude

I assume the later is one created especially for the NBN Atlas?

See e.g. https://records.nbnatlas.org/occurrence … f9deed4d8b but there are lots of examples.

Charlie Barnes
Information Officer
Greater Lincolnshire Nature Partnership

charliebarnes's Website

2 Reply by sratcliffe

  • sratcliffe
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  • Registered: 03-07-2017
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Re: Latitude Longitude calculated from grid reference

Hi Charlie,
Thank you for letting me know about this. I think it is related to your other message about tetrad records being converted to 1km grid references. It looks like the Atlas derives the point coordinates from the tetrad and then derives a 1km grid reference from the point coordinates, hence the two data quality warnings.

I have no idea why it would do this. I'll log it with Reuben and let you know as soon as possible.

Many thanks, Sophie