Does anyone know what this line of circles on a map represents? (the ones that start belowto the seast of hangman'swhere it says Hangman's Hill) It is near malvernMalvern. We passed some rocks but they were probabkyprobably 300 meters away from the map feature, and the circles look too 'perfect' to represent rocks? It is an OS 1:25000. 
Does anyone know what this line of circles on a map represents? (the ones that start below the s of hangman's Hill) It is near malvern. We passed some rocks but they were probabky 300 meters away from the map feature, and the circles look too 'perfect' to represent rocks? It is an OS 1:25000.
Does anyone know what this line of circles on a map represents? (the ones that start to the east of where it says Hangman's Hill) It is near Malvern. We passed some rocks but they were probably 300 meters away from the map feature, and the circles look too 'perfect' to represent rocks? It is an OS 1:25000.
Unknown map symbol
Does anyone know what this line of circles on a map represents? (the ones that start below the s of hangman's Hill) It is near malvern. We passed some rocks but they were probabky 300 meters away from the map feature, and the circles look too 'perfect' to represent rocks? It is an OS 1:25000.