aerial digital elevation model for hydrology evaluation

aerial agoyan agua analysis area assisted banos borne celec cgi computer construction dam development digital drone ecuador efficient elevation engineer engineering geodesy georeferenced geospatial gis ground groundbreaking harvesting high hydrologic hydrological inspection investigation large map model modern multirotor orthorectification orthorectified photogrammetry potential professional representation resolution riverbed santa smart space spatial survey surveying technique technology terrain topology tungurahua visual water