![]() In Oxfordshire and Berkshire it is particularly easy to remember that SU is to the south and SP is to the north by remembering that the ‘U’ in SU suggests ‘underneath’. One way to remember which comes first is to remember ‘Along the corridor and up the stairs’ – reminding you to give the figure along from the vertical line and up from the horizontal.Īnother common mistake is to give the wrong 100km two letter reference (SP instead of SU or vice versa). These two numbers (4 and 2) are written as the third and sixth numbers in your six figure grid reference.Įven people who are very used to grid references occasionally get them ‘back to front’ – this is when you give the northing before the easting instead of correctly giving the easting before the northing. 4 sub-divisions to the east and 2 sub-divisions to the north. Four figure grid reference - square selected. You need to count how many subdivisions to the east of the nearest vertical 1km line and how many 100m sub-divisions north of the nearest horizontal 1km line your spot is e.g. Four figure grid references locate a grid square (usually 1 km square) on a map. To work out a six figure grid reference you need to sub-divide a 1km square into 100m squares – these sub-divisions are marked on the outside edge of a 1:25,000 Explorer map, but they are not numbered. You can give a four figure grid reference by writing the 100km letter code (SP) followed by the number of the vertical line running down the left hand side of the 1km square (the easting) and then the number of the horizontal line running along the bottom of the 1km square (the northing). ![]() Correct examples of grid references are: TF73. All British grid references should begin with two letters, those in Ireland starting with one letter, and followed by a series of numbers (and/or the tetrad code). A correct grid reference does not include the map sheet number. Each one of these lines is labelled with two numbers. The regular Ordnance Survey Land Ranger and Explorer series of maps do not cover the Channel Islands, and the islands. Correctly reading grid references is crucial for many BTO surveys. In Oxfordshire and Berkshire the codes are either SU (Berkshire and south Oxfordshire) or SP (north Oxfordshire) with a small part of TQ (eastern-most part of Berkshire).Įach 100km square is divided into 1km squares and these are the lines that you see on an Ordnance Survey map. ![]() This code forms the first part of your grid reference. The UK is divided into 100km squares by the Ordnance Survey and each 100km square has a two letter code (see map). ![]() It is easier to work out an accurate grid reference using a 1:25,000 (4cm to 1 km / 2 ½ inches to 1 mile) Explorer map (the ones with the orange cover) rather than a 1:50,000 (2cm to 1km / 1 ¼ inches to 1 mile) Landranger map (pink cover). Enter a location search below to zoom to the approximate location. If you don't know the grid reference, you can find it using .Īlternatively, you can use any Ordnance Survey map to work out a grid reference. Instructions: Simply right click on the map to find a grid reference at that point. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |