Зачем до домов. По сетке дорог же. Берешь курвиметр (Ломоносов изобрел еще) и откладываешь от нужной точки в разные стороны. Потом плавно соединяешь отсечки между собой. Выглядит не слишком сложно
Ломоносов?
Поправьте англовики.
Early versions of this instrument were patented in 1873 by the English engineer Edward Russell Morris.[2] The instruments he produced were initially described as a Patent Chartometer although later versions were sold under the curious name of Wealemefna.[3]Writing in 1881, Morris described how he had created a wholly original name in an attempt to outwit his imitators; he also refused to disclose the origin of the word.[4]