digital topographical land surveying by using electronic total station showing all existing details, like building, boundary wall/fencing for each unit, road, electric pole, light pole, transformer, tree, earth pit, paver block, dustbin, water tank, post, plinth level and existing drain with invert level, existing main sewage line, spot level at 5.0 x 5.0m and contour interval one m marking of bm and tbm as directed by ge, submission of drawing in autocad format 04 sets in coloured drawing