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Anyone heard of Georef? When I was in the Royal Observer Corps, many years ago, I remember we used "UTM" on some maps, which seems to be the Military grid reference system; co-ordinates (within Europe, say) were like "PQ 123 456". But on other maps, we used a system I remember being called "Georef". This had a similar notation — two letters to identify a major "square", then two or more digits to identify a point within the "square" — but was based on lat-long, not UTM; hence, the "squares" were curved-trapezoids. You got the accuracy of lat-long with the convenient notation of UTM / British grid. Now I can't find any info on Georef (which, if it really existed, sureley deserves a mention). Anyone ever heard of this? — Johantheghost 18:10, 2 December 2005 (UTC)
This makes no sense whatsoever. Anyone care to explain? How does someone have a legitimate lat and long and not know where on earth it is?! RobertDahlstrom ( talk) 21:49, 7 May 2008 (UTC)
Such an MGRS coordinate, standing alone, may be converted to latitude and longitude. But you still do not know the position on the Earth, unless you also know the geodetic datum that is used.
Sorry about being too brief, but I hoped people would follow the link to geodetic datum. Actually, a better link would be A guide to coordinate systems in Great Britain, published by the Ordnance Survey. It gives the best explanation of geodetic datums that I have ever seen. Figure 1 in the introduction gives an example of what I meant. -- Mikael R ( talk) 19:14, 13 May 2008 (UTC)
I don't see how the statement is relevant to MGRS. Yes it's true that lat/lon requires a datum in order to be properly interpreted, but this article is about MGRS, not lat/lon. The rest of the article is focused on MGRS-specific traits, but this sentence about lat/lon is an entry to a whole other set of topics, and I think it's distracting here. It's like it's there just to lead you off into datums and geodesy, etc. Pardon my snarky example, but it would be like me saying that you can enter an MGRS coordinate into a handheld GPS unit, but the GPS won't work without batteries. i.e., not relevant to MGRS. -- LVB ( talk) 17:09, 28 June 2013 (UTC)
I see no link to "point reference system" nor article by that name. Is the concept explained in another article, or should the distinction between that and other systems be explained in this one? Jim.henderson ( talk) 09:29, 16 January 2011 (UTC)
The article not explains neither point to a source about.— Preceding unsigned comment added by 179.208.229.37 ( talk) 14:38, 1 September 2013 (UTC)
From the article:
I've been researching MGRS for a few days, but the above is totally opaque to me. Does this have something to do with the fact that locations that border GZJs are canonicalized by some software libraries (e.g. 17SKT --> 16SGB5807198790)? We should clarify the above with an example. Ericbg05 ( talk) 13:39, 10 June 2014 (UTC)
References
Referenced by this converter, where the coordinates match the lat/lng to MGRS conversion done by a different converter.
This book also references it, but I'm not buying the book to look at the books reference.
I'm not going to edit the actual article without a better reference than a google books link to a book whose sources I can't check.
Mtfurlan ( talk) 16:19, 27 October 2016 (UTC)
I don't know why some zone starting with zero numbers and some zone starting with the numbers 6 (starting point). 27.109.113.245 ( talk) 08:55, 20 May 2023 (UTC)
This article is rated B-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||||
|
This needs to be categorized.
Anyone heard of Georef? When I was in the Royal Observer Corps, many years ago, I remember we used "UTM" on some maps, which seems to be the Military grid reference system; co-ordinates (within Europe, say) were like "PQ 123 456". But on other maps, we used a system I remember being called "Georef". This had a similar notation — two letters to identify a major "square", then two or more digits to identify a point within the "square" — but was based on lat-long, not UTM; hence, the "squares" were curved-trapezoids. You got the accuracy of lat-long with the convenient notation of UTM / British grid. Now I can't find any info on Georef (which, if it really existed, sureley deserves a mention). Anyone ever heard of this? — Johantheghost 18:10, 2 December 2005 (UTC)
This makes no sense whatsoever. Anyone care to explain? How does someone have a legitimate lat and long and not know where on earth it is?! RobertDahlstrom ( talk) 21:49, 7 May 2008 (UTC)
Such an MGRS coordinate, standing alone, may be converted to latitude and longitude. But you still do not know the position on the Earth, unless you also know the geodetic datum that is used.
Sorry about being too brief, but I hoped people would follow the link to geodetic datum. Actually, a better link would be A guide to coordinate systems in Great Britain, published by the Ordnance Survey. It gives the best explanation of geodetic datums that I have ever seen. Figure 1 in the introduction gives an example of what I meant. -- Mikael R ( talk) 19:14, 13 May 2008 (UTC)
I don't see how the statement is relevant to MGRS. Yes it's true that lat/lon requires a datum in order to be properly interpreted, but this article is about MGRS, not lat/lon. The rest of the article is focused on MGRS-specific traits, but this sentence about lat/lon is an entry to a whole other set of topics, and I think it's distracting here. It's like it's there just to lead you off into datums and geodesy, etc. Pardon my snarky example, but it would be like me saying that you can enter an MGRS coordinate into a handheld GPS unit, but the GPS won't work without batteries. i.e., not relevant to MGRS. -- LVB ( talk) 17:09, 28 June 2013 (UTC)
I see no link to "point reference system" nor article by that name. Is the concept explained in another article, or should the distinction between that and other systems be explained in this one? Jim.henderson ( talk) 09:29, 16 January 2011 (UTC)
The article not explains neither point to a source about.— Preceding unsigned comment added by 179.208.229.37 ( talk) 14:38, 1 September 2013 (UTC)
From the article:
I've been researching MGRS for a few days, but the above is totally opaque to me. Does this have something to do with the fact that locations that border GZJs are canonicalized by some software libraries (e.g. 17SKT --> 16SGB5807198790)? We should clarify the above with an example. Ericbg05 ( talk) 13:39, 10 June 2014 (UTC)
References
Referenced by this converter, where the coordinates match the lat/lng to MGRS conversion done by a different converter.
This book also references it, but I'm not buying the book to look at the books reference.
I'm not going to edit the actual article without a better reference than a google books link to a book whose sources I can't check.
Mtfurlan ( talk) 16:19, 27 October 2016 (UTC)
I don't know why some zone starting with zero numbers and some zone starting with the numbers 6 (starting point). 27.109.113.245 ( talk) 08:55, 20 May 2023 (UTC)