Primary Trigs In Wales
| Use attributes for filter ! | |
| Google books | books.google.com |
|---|---|
| Originally published | April 2013 |
| Authors | John Davies |
| Music groups | French Christmas Activity Fun Book |
| Date of Reg. | |
| Date of Upd. | |
| ID | 2094192 |
About Primary Trigs In Wales
In 1935 the Ordnance Survey - the UK mapping agency - began the huge task of re mapping the British Isles. This involved building and surveying over 6500 triangulation or 'trig' pillars - the familiar concrete obelisks that frequent the British landscape, countryside and mountains. . . .