The scope of work covered in this tender consists of preparing updated GIS database for Master Planning of the Sewerage System by conducting topographical surveys for unsewered areas of Delhi including preparation of detailed base maps using satellite image with spatial resolution of 0.6m or better. It is the basic requirement for development of holistic, integrated, sustainable and implementable master plan to meet sewerage requirements of Delhi to the year 2031; and a detailed report, including mobilization of necessary instrument/equipment, providing necessary engineering supervisors and technical personnel skilled and unskilled labour and such other as required to carry out field topographic surveys and preparation of drawings and survey report. This scope is indicative only.