The DTM is produced with Teledyne multibeam echosounder survey, acquired in March 2023 by Marine Research Ltd. The resolution 5m x 5m. It is located at Sulina, Romania, on the coastal region of the Black Sea. Depths are referenced to the Local Sea Level - Marea Neagra 1975 (Mean Sea Level) and the coordinates are expressed into the WGS84 reference frame.

Hydrographic survey performed by the Portuguese Hydrographic Institute (IHPT) using echosounders. The depth values are referred to the Portuguese Chart Datum.

Hydrographic survey performed by the Portuguese Hydrographic Institute (IHPT) using echosounders. The depth values are referred to the Portuguese Chart Datum.

Hydrographic survey performed by the Portuguese Hydrographic Institute (IHPT) using echosounders. The depth values are referred to the Portuguese Chart Datum.

Hydrographic survey performed by the Portuguese Hydrographic Institute (IHPT) using echosounders. The depth values are referred to the Portuguese Chart Datum.

Hydrographic survey performed by the Portuguese Hydrographic Institute (IHPT) using echosounders. The depth values are referred to the Portuguese Chart Datum.

Hydrographic survey performed by the Portuguese Hydrographic Institute (IHPT) using echosounders. The depth values are referred to the Portuguese Chart Datum.

Hydrographic survey performed by the Portuguese Hydrographic Institute (IHPT) using echosounders. The depth values are referred to the Portuguese Chart Datum.