Copied from Spanish map, 1:25,000, Madrid no. 559, 1937. "Iberian Peninsula zone grid (blue); Projection: Lambert conical Orthomorphic; Spheroid: Hayford; Origin 40°N and 3°41'14.55"W (Madrid meridian); False co-ordinates: 600,000 meters east of origin, 530,000 meters North; Scale factor: 1,000,000." "3-43." AMS 1. Alternate title: Madrid city plan. Copied from Spanish map, 1:25,000, Madrid no. 559, 1937. Lambert conical orthomorphic projection. Iberian Peninsula Zone grid.