ODA Civil SDK is a set of C++ dynamic-link libraries that works with Autodesk® Civil 3D® files from any application.

Structurally, Civil SDK consists of several modules, containing classes that encapsulate civil objects:

• AECCivilBase — Land Desktop points and contours.
• AECCLand — COGO points, alignments, feature lines, and surfaces.
• AECCNetwork — Gravity pipe networks, pipes, and structures.
• AECCPressurePipes — Pressure pipe networks, pressure pipes, fittings, and appurtenances.
• AECCBuildingSite — Building sites.
• AECCPlanProd — Match lines.
• AECCRoadway — Corridors, assemblies, and subassemblies.
• AECCSurvey — Survey networks and survey figures.
• AECCVBase — Base AeccDb* classes such as TreeNode, ClassNode, Style, Object, Entity, etc.
• AECCHydrology — Catchment areas.

To work with a class, load the corresponding module as a .tx file (for dynamic configurations) or link the .lib file (for static configurations).

The AecBase module from Architecture SDK must also be loaded/linked because Civil classes are inherited from Architecture classes.

Civil modules are automatically loaded if the DEMANDLOAD variable isn't disabled.