Hydrographic sections — Guyana 2015 — BD Carthage

Descriptive definition of BD Carthage content: an elementary hydrographic section corresponds to the axis of the bed of a river, creek or canal

The polylines are drawn a priori in the direction of the flow of the section.

The minimum length of a section is 200 metres on the ground.
The cutting of the sections shall be carried out according to:
— A change of attribute in the fields of the table,
— A change in the type of medium: the section crosses a surface area, for example,
— A modification of the morphological facies of the watercourse (single arm, anastomosis),
— The presence of a jump (expressed by a break of slope),
These changes are identified by photo-interpretation of available orthoimages.