GAG Hamburg

For Hamburg city, the city’s drainage network was performed on a constructed area of 411 square kilometers with 185000 plot of land. In addition to the categories of impervious surface –as a basis for future sewer hydraulic calculations.The flow direction of the plots of lands have been determined.

GAG Aggerverband

For Aggerverband , Ruppichteroth and Nümbrecht, about of 2451 hectares were mapped to categories of road, road, partially sealed area and unsealed area.


GAG Lemgo

For sealing surface mapping of the old Hanseatic city of Lemgo, the flight survey has been carried out with a digital camera,where the areas have been mapped stereoscopically by using of aerial photographs. Finally,the aerial photographs were rectified and processed into ortophoto.