Table 1 Major Data types and their sources

Satellite image (SPOT)

Amhara Design Supervision and Works Enterprise

5 m

February/2006E.C

Digital elevation model (DEM) of Lake Tana and its environs

Ethiopian Mapping Agency (EMA) (2012)

Resampled into 20 m

04/2006E.C

Field survey data

Ground survey with global positioning system (GPS)

+2 m error

October 15–18/2006E.C, November 30-Dec 15/2006E.C, February 1–5/2006E.C, and March 10–14/2006 E.C

Bathymetric data

Amhara National Regional State, Bureau of Industry and Urban Development (ANRS BoIUD) 2012

January, 2006E.C