HEADS Rail, a CAD-based railway design software, processes survey data from total station. This data is then processed to create DTM with ground contours. HEADS Rail can also process satellite images, convert from TM to UTM coordinates, communicate with Google Earth to plan green field alignments, and process ground elevation data online downloaded from the shuttle radar topography mission. (SRTM) This is done using global mapper, which does not require any field topo survey. HEADS Rail designs metro railways with underground and elevated sections in straight or curved sections depending on the site. HEADS Rail, a highly developed program, is capable of processing railway track design and double-track jobs that have different requirements. This includes alignment geometrics, vertical profiles, crossings, yards, and yard processing. HEADS Rail creates sophisticated project construction drawings for estimate, plan, profile, cross section and estimation.