Obtaining Grid-Refs. The Easy Way For All The UK

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Obtaining Grid-Refs. The Easy Way For All The UK

Postby SteveMcBill on Wed Oct 15, 2008 11:15 pm

Obtaining Grid-Refs. The Easy Way For All The UK - (15/10/2008):

Working out OS Grid References for species records/sightings has always been slightly problematical both in terms of the time it takes, the physical resources required (maps etc.), and the potential accuracy/inaccuracy of the result. It is not all that easy 'guesstimating' the exact position within a 10Km square to a six-figure accuracy never mind an 8 or 10 figure. (N.B.: Please see also, the post below this one !!!!!).

However, such times are now in the past !! The rECOrd website has a new data-entry facility (RODISrECOrd On-line Data Input System) to allow recorders to enter their own data (and to export it back to themselves, or to others, as spreadsheets). Within this facility there is now a `new' button next to the Grid-Ref entry field called "G Map". Click this button and a window comes up with a map from Google Maps (hence G Map). Or, click this link: https://record-lrc.co.uk/RODIS/RODIS.htm

You can zoom in and out of the map, you can move it around by holding the mouse button down and dragging the map, you can jump to named places by typing in a place name (e.g. town name) or a Post Code and clicking the 'Search' button - OR - you can jump to a specific Grid Ref by typing in the Grid Ref and clicking the 'Search by Grid Ref' button. More importantly, you can turn on 'Satellite View'' which overlays the map with satellite based overhead imagery/photographs of the area being looked at whilst still showing road names, etc. This means that you can, when zoomed all the way in, even see individual trees in hedgerows, etc.

Clicking on the map when zoomed in will deliver an OS Grid-Ref at 8 figure accuracy (and in certain areas of the Country (e.g. Stockport, London, etc.) even up to 10 figure accuracy) and there is a button to click to drop this Grid-Ref directly into the data entry field in RODIS. Could recorders please use at least a 6-figure Grid Reference to accurately place their sightings and to enable future recorders to attempt to verify their finds at specific geographical locations. 4-figure GR's are acceptable but are nowhere near as useful as 6, 8 or 10 figure references as these can always be displayed/plotted at 4 figure resolution BUT 4 figure references can never be displayed/plotted at a higher resolution - this means that if a map is displayed at a 6-figure resolution then all 4 figure records must be left out !!!!

Grid-Refs can be obtained in this fashion for ANYWHERE in Britain !!!
That should save the cost of buying loads of maps every time one goes away and 'does' recording on holiday.

We hope it helps you in your recording. If you have any feedback on the operation of 'G Map' and/or RODIS or any suggestions for enhancements to RODIS, the rECOrd website, or any of the other facilities available on the website, etc.. then please do contact the staff at rECOrd (01244 383749) or by e-mail at: (info@rECOrd-LRC.co.uk).

Cheers.

Steve :)

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Grab A Grid Reference - Even Easier - New Facility

Postby SteveMcBill on Mon May 11, 2009 7:42 pm

Grab A Grid Reference In The UK - Even Easier - New Facility - (07/05/2009):

As of Thursday 7th May 2009, a new Google Mapping facility has been added to the rECOrd website. This new facility is specifically designed to aid naturalists and recorders in obtaining accurate Grid References to place with their sightings of wild organisms (plants, animals, etc.). The 'new' facility can be found over at:

http://googlemaps.record-lrc.co.uk/

The facility previously supplied inside RODIS (rECOrd Online Data Entry Service) is still available but is more appropriate for those using RODIS to enter their records/data either to go into the rECOrd database or to be exported as a CSV file back to themselves or to other recording schemes.

To use the 'new' facility, firstly either click the link above or drop the 'Records' menu at the top of the website page and go down to 'Google Mapping Facility' . Then, click your mouse over the tab at the top of the map page which says "Grid reference tools" - a pop-up menu will be displayed; click the button which says "Get grid reference from map", this will enable the display of Grid Refs by clicking on the map.

Position the map and, using the zoom tool on the left-hand side of the screen, zoom in to the maximum level to find the place for which you want a Grid Reference and then left click on the map at that point - the Grid Ref for that point will be displayed and can then be copied out for the record(s) you made and/or you saw at that particular geographical point. Could recorders please use at least a 6-figure Grid Reference to accurately place their sightings and to enable future recorders to attempt to verify their finds at specific geographical locations.

Happy Grid Referencing !!!!

Steve :)

Generating a Grid Reference, Working out a Grid Reference, Grid Ref, GR
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Re: Obtaining Grid-Refs. The Easy Way For All The UK

Postby Bananafishbones on Sat Aug 09, 2014 9:50 am

Steve, or indeed anyone else.

I am doing a mothing session for someone this evening and I wanted to get an exact Grid ref. When I enter the details in this instance it is Little Hulton area (Trafford Drive) the road is covered by about 4 squares, can I pin point the exact square? House No is 33

Cheers
Dave
Garden mothing with a big un (125MV skinner) or a little un (2 x 30W actinic Sinner)
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Re: Obtaining Grid-Refs. The Easy Way For All The UK

Postby SteveMcBill on Sat Aug 09, 2014 11:46 am

Dave,

See my reply in the Moth Forum - hope it helps - if not then please do shout !!

Cheers,

Steve

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Re: Obtaining Grid-Refs. The Easy Way For All The UK

Postby Bananafishbones on Sat Aug 09, 2014 12:32 pm

Gotcha info Steve, many thanks.

Dave

Garden mothing with a big un (125MV skinner) or a little un (2 x 30W actinic Sinner)
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Re: Obtaining Grid-Refs. The Easy Way For All The UK

Postby RachelMC on Mon Aug 11, 2014 11:01 am

For information, here is a link to the Moths Forum thread about Grid Refs that Steve McWilliam (SteveMcBill) is referring to:

http://www.record-lrc.co.uk/forum/viewtopic.php?f=24&t=1609

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Re: Obtaining Grid-Refs. The Easy Way For All The UK

Postby SteveMcBill on Mon Aug 18, 2014 10:05 am

Article on Tetrads and 10Km Squares - from Lancashire Moths Newsletter 28 (Aug 2014):

Tetrads and 10Km Squares:

A few people have expressed the wish for more explanation of what are meant by Tetrads and 10 kilometre squares and how these relate to Atlases

Many of you are birders (or ex-birders) and may possess the recent National Breeding and Wintering Birds Atlas or seen the online Lancashire Breeding and Wintering Bird Atlas. The moth recording is exactly the same methodology (as are all fauna/flora groups).

Each 10km square is allocated two letters followed by two numbers. The first number remains the same on the vertical axis and the second number remains the same on the horizontal axis (e.g. in northern VC60):

SD47 (e.g. Leighton Moss) SD57 (e.g. Pine Lake) SD67 (e.g. Leck)
SD46 (e.g. Morecambe) SD56 (e.g. Caton) SD66 (e.g. Wray)
SD45 (e.g. Glasson) SD55 (e.g. Dolphinholme) SD65 (e.g. Dunsop)

Each 10 kilometre square is divided into tetrads (2 x 2km squares) and there are 25 of them, so the alphabet is used minus the letter ‘O’. The colloquial name for a 2km square is a “DINTY” and this spells out the second line as follows:

E J P U Z
D I N T Y
C H M S X
B G L R W
A F K Q V

In order to fully identify a particular Tetrad, just add the tetrad letter to the 10km square, so, for example, Heysham Nature Reserve office toilet trap is in SD45E. Unfortunately the boundaries are sometimes a nuisance, so
anything caught in Heysham Nature Reserve North is in fact in a different 10km square and in SD46A so you have to be careful to note where you place actinic/portable traps!

For a NATIONAL Atlas, such as the current Macro Moth atlas, all that is required is a SINGLE record from any one of the tetrads to produce a 10km square dot on the National map. So do you only need a single garden trap to ‘cover’ the 10km square? Whilst this will provide the majority of the ‘bread and butter’ and quite a few of the less usual species over time, garden traps have two disadvantages.

Firstly, they are ‘hopeless’ during the winter months (October to March) for a variety of reasons, resulting in people not bothering at this time and therefore a whole shed-load of common winter-period moth species are
under-recorded. Therefore it is important to get out into your (unlit) local woodland at this time, probably best
with an hour or so’s sheet and light or an actinic with a well-insulated battery capable of lasting a long night.

Secondly, the garden might not be near enough to key habitats holding different species. If you check the map, you might find the only (e.g. pine wood/moorland/deciduous valley) is at the opposite end of the 10km square from your house. You may wish to investigate the possibilities.

Despite the otherwise excellent coverage in our region compared to many areas, until recently no-one was trapping in SD54 (Oakenclough, etc.) and this was referred to by the National Atlas organisers as a “white hole” (i.e. no Atlas dots). There are plenty of “white holes”, especially in Scotland, and anyone on holiday might like to take a trap with them …………

Sometimes the only available part of the 10km square for moth trapping is part of a single Tetrad as the rest is intertidal or under the sea. This happens with SD36V at Heysham Harbour and what an amazing list of species this “wasteland” has produced, including record hauls of White-line Dart relating to the former use as a sand reclamation plant. When recording, it is important to try and use a six-figure grid reference for most sightings. Where food-plants and habitats are very localised, a four-figure or even just a tetrad number is not really precise enough !!!

Thanks in anticipation of this explanation providing a few more records.

https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxsYW5jYXNoaXJlbW90aHJlY29yZGluZ3xneDo5NDdhZjY4OGJmMDM5YjY


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Re: Obtaining Grid-Refs. The Easy Way For All The UK

Postby SteveMcBill on Sun Aug 31, 2014 5:45 pm

DINTY Tetrads:

This form of subdivision is generally seen as non-standard, but is encountered frequently within the world of recording, specifically for local distribution maps. This form of grid reference involves the production of 2km squares, and so divides one 10km square into 25 equal squares, (see figure 8 below).

To label each 2km tetrad square, all letters of the alphabet are used with the exception of 'O' (as it may get confused with a zero, and thus be confused with a different type of grid reference with a number missing). As can be seen in figure 8 below:

Image

The labeling commences in the bottom left-hand corner, and follows the alphabet moving up the left side, moving one column to the right once the top of the square is reached. As with the 5km squares above, the name of any individual 2km tetrad is the name of the 10km square it resides in followed by the single letter shown above. The highlighted tetrad above has a grid reference of TQ75G. The 10km square can be seen to be SJ75 by the labels along the sides, with all west-east numbers beginning with 7, and all south-north numbers beginning with 5. Any record ending with a single letter could be located anywhere within that 2km square, or in this case within any of the 1km squares SJ7252, SJ7253, SJ7352 or SJ7353. The reason this system is sometimes called the DINTY tetrad system, is because the 'word' DINTY is spelled out reading across the second row down.

As with the 5km squares, this form of subdivision could theoretically be used at different measurement levels, and thus a grid reference of SJ6437B would refer to anywhere within the 200m x 200m square located within the 1km square SJ6437 using the same grid labeling method shown in the 2km tetrad method above.

Borrowed from the Kent and Medway BRC wesbite: http://www.kmbrc.org.uk/

KMBRC - National Grid System: http://www.kmbrc.org.uk/recording/help/gridrefhelp.php?page=2

KMBRC - Standard 6-fig GRs: http://www.kmbrc.org.uk/recording/help/gridrefhelp.php?page=3

KMBRC - Uses of Different Grids: http://www.kmbrc.org.uk/recording/help/gridrefhelp.php?page=7


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Re: Obtaining Grid-Refs. The Easy Way For All The UK

Postby RachelMC on Mon Sep 08, 2014 4:14 pm

Hello All !

I've updated and ordered all the information on the RECORD website to do with getting Grid References. I've used some existing links and added new ones with more recent information. The pages are gathered together in a navigation as follows:

| Home | OS Grid Ref System | Paper maps | RODIS | GPS | Google Maps | DINTY | Apps |

As technology changes, so this will have to be updated! Please have a look and let me know what might need to be changed/updated. In particular, I have just copied the existing page about GPS as I have no expertise in using these devices. Any comments would be greatly appreciated!

Thanks,
Rachel

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