Measuring coordinates Advent of edm allowed direct measurements of sides of triangles Since all distances measured less prone to scale errors However, still only good for horizontal coordinates 02/11/02 12.540Lec0202/11/02 12.540 Lec 02 8 Measuring coordinates • Advent of EDM allowed direct measurements of sides of triangles • Since all distances measured less prone to scale errors. • However, still only good for horizontal coordinates