Map Projection

After the completion of this course, students should be able to: 1. identify physical and mathematical representation of earth’s surface; 2. explain the theory, uses of map projection and various map projection systems; 3. discuss the concept and characteristics of NTM and UTM; and 4. transform coordinates from Geographic to NTM, UTM and vice versa.

Basic concept, theory and uses of map projection. Representation of the earth's surface by physical and mathematical figures. Geometry of the ellipse and reference ellipsoids. Coordinate systems (Cartesians, spherical and ellipsoidal), Computations on spherical and ellipsoidal surfaces. Types of geodetic reference systems, computational procedures and coordinate transformation methods. Projection systems: plane, conic, cylindrical, conformal, equidistance, equivalent, azimuthal projections, convergence, line scale factor, arc-to-chord correction. Concept of conformal projection, Transverse Mercator (TM), Nigeria Traverse Mercator (NTM) and Universal Transverse Mercator (UTM). Transformation of coordinates from geographic to NTM and UTM and vice versa.