Mepụta ụdị nke ahịrịokwu a nke dị mgbagwoju anya Nwoke Wales bụ onye kachasị ọrụ maka imecha ngalaba nke Nnukwu Trigonometric Survey nke India n'akụkụ arc meridian site na ndịda India na-agbatị na ugwu ruo Nepal, ihe dị ka kilomita 2400.
N'ezie, ụdị nkebi ahịrịokwu ahụ dị mgbagwoju anya bụ "Welshman bụ onye kachasị ọrụ maka ịmecha ngalaba nke Nnukwu Nnyocha Trigonometric nke India n'akụkụ arc meridian site na ndịda India na-agbatị n'ebe ugwu ruo Nepal, ihe dị ka 2500 mmeters urvey malitere site na William Lambton na 1806 ma were ọtụtụ iri afọ. "