CHAPTER 12: OS MAPS AND AERIAL PHOTOS 13 08 14 15 16 08 07 07
On Fig. 12: The location of Lough Dan is sub-zone = O Easting co-ordinate = 15 Northing co-ordinate = 03 Therefore, the location of the lake of Lough Dan is O 15 03.
MAP SKILLS EXERCISE (A) 06 06 05 05
1. What is located at O 14 05? 2. Locate the following as four-figure grid references. (a) Lough Tay. (b) Forest on the east of Lough Dan. (c) The village of Laragh at the intersection of all of the valleys.
04 04 03 03 02 02
Six-figure grid references This type of grid reference gives a more exact location. It can locate specific landforms, sites or services on the map, e.g. an oxbow lake, ringfort or post office. The same basic method is used to get this grid
01 00
O T
99 98 97 01
reference as is used to get a four-figure reference but an extra two numbers are added. These numbers are the further division in tenths of the distance between any two eastings or northings.
00 99
On Fig. 12: The post office at Laragh is located at sub-zone = T Easting = 140 Northing = 966 Therefore, the post office at Laragh is T140 966.
98 MAP SKILLS EXERCISE (B) 97
1. What is located at T 163 987? 2. What is located at O 150 O74? 3. Give a six-figure grid reference for the car park to the west of Laragh.
96 13 14 Fig. 12 OS map, County Wicklow 15 16 217 96
4. Give a six-figure grid reference for the top of Scarr mountain south- west of Lough Dan.