[Extension](https://www.opendesign.com/sig) # Civil SDK Interoperability for Autodesk® Civil 3D® files [Free 60-Day Trial](https://www.opendesign.com/free-trial) ## Core capabilities Full access to Civil 3D® file data Edit Civil objects via a high-level API Import geometry, properties, or styles into any application Interactive 3D visualization on desktop, mobile or web Publish to 3D PDF #### Features - [Read](#product-feature-1) - [Edit](#product-feature-2) - [Create](#product-feature-3) - [Write](#product-feature-4) - [Visualize](#product-feature-5) - [Publish](#product-feature-6) - [Licensing](#product-feature-7) ##### Civil provides read access to data in civil custom objects through a convenient API. ###### Smart Civil Objects Access common civil entities and the relationships between them: Cogo points, surfaces, corridors, assemblies, alignments, profiles, pipe networks and more. ###### Styles Get the styles assigned to civil entities and the data associated with them. ###### Terrain Data in Sections and Profiles Read section and profile data for surface elevations to visualize topography. ###### Text and Labels Access text, labels, and other annotating data that correspond to civil objects. ##### Edit Civil objects via a powerful high-level API. ###### Modifying Object Properties Modify all standard properties of drawing objects (visibility, style, associated layer, etc.), civil-specific properties (coordinates, elevations, slopes, etc.) and user-defined properties. ###### Geometric Transformations Perform standard object transformations (translation, rotation and scaling), use object-specific functions to modify specific geometric parameters or explode a complex object into a set of simpler elements by using the built-in decomposition mechanism. ###### Smart Linking Civil objects relate to each other and dynamically link to project documents and specifications — reacting to any design changes and updating project documentation. ##### Create standard civil objects such as Cogo points, surfaces, and alignments. ###### Smart Civil Objects Create civil entities and the relationships between them: Cogo points, surfaces, and alignments. ###### Associative and Non-Associative Objects Associative civil objects automatically update their corresponding dimensions, spaces, and calculations. Non-associative civil objects can also be created with user-defined geometry for standalone objects. ###### Dictionaries and Extended Data Create and edit dictionaries to store objects of different types, add new types of objects, embed custom objects, attach various data to the objects, and perform flexible restructuring of the database. Use the extended data API to attach various data to an object that can be used in external applications. ##### Save civil objects with their design data to the latest civil version. ###### Save the Latest Version Civil SDK saves objects in the most recent civil object format, ensuring interoperability between applications that work with civil objects. ##### Visualize civil objects on any platform using any device. ###### Performance Spatial filtering and other performance enhancing techniques provide fast rendering of civil objects. ###### Visual Styles Use different visual styles to customize your rendering of silhouettes, obscured (hidden) edges, "always on top" edges, transparency and more. ##### Publish civil objects to rich, functional 3D PDF, or standard 2D PDF. ###### Model Presentations Sections and profiles make it easy to create comprehensive presentations of a civil model. Section and profile objects are dynamically linked to the civil model, so any model changes are automatically reflected in all related sections and profiles. ###### Reports and documentation Full support for plan sheets and property sets that can be used to create model specifications. Civil objects can be linked to schedules, so they automatically reflect any design changes. ##### Civil SDK can be licensed by Sustaining, Founding and Corporate members of ODA. ###### Collaborative Development Civil SDK is developed through a Special Interest Group (SIG) within ODA. A SIG is a separately funded development project that allows small groups of ODA members to collaboratively fund specialized projects. ###### SIG Requirements Any ODA member of Sustaining level or higher may participate in a SIG. An additional SIG-specific contract must be executed to join a SIG. ###### Price Membership in the Civil SIG, which includes access to the Civil SDK for commercial use and free technical support, is $10,000 per year. SIG fees directly fund the development work for the project. Please see pricing for more details about licensing options. ## Open Roads SupportInteroperability for Bentley Open Roads Data ODA is seeking funding to develop support for extracting Open Roads data from DGN files. 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x1='-4.37114e-08' y1='1' x2='385' y2='1.00003' gradientUnits='userSpaceOnUse'%3E%3Cstop stop-color='%23007AFF'/%3E%3Cstop offset='0.564349' stop-color='white'/%3E%3Cstop offset='1' stop-color='%23007AFF'/%3E%3C/linearGradient%3E%3C/defs%3E%3C/svg%3E) ### Features - Extract detailed hydrology elements, including culverts, headwalls, channel liners, and storm sewers, with storm sewer inlet types and pipe connection types. - Extract alignments, profiles, surface and other civil objects. - Visual Open Roads data. ## Roadmap - ### 2023 #### Surface performance - 500k points processed in 1s (vs. 450s before) - 2.5M points in 4.7s (vs. 3+ hours) #### Topology fixes & breaklines - Improved triangulation logic - Non-destructive breakline insertion #### Alignments - Redesigned spiral-curve-spiral transitions - Better constraint handling and accuracy #### Profiles & Superelevations - Fixed view rendering, index tables, profile loading #### Corridor to Solid - First release of geometry export for corridor objects #### CDA integration - Added Common Data Access (CDA) support for: - Cogo Points - Surfaces - Alignments - Profiles - Sections - Pipes and Networks - ### 2024 #### Surfaces - New **Paste Definition** to merge surfaces - Surface **extrapolation** and **drape** tools - Improved **topology handling** and overlapping triangle fixes #### Profiles - Support for new entity types (e.g., **High/Low Point Parabola**) - Improved handling of external entities and dependencies - Auto-generated profiles from alignments/surfaces #### Alignments - Float spiral transitions with custom location - Free SCS transitions defined by A values #### Corridor to Solids - Color and layer support per solid group - Tree-like structure for exported solids - Improved handling of complex geometry #### CDA Integration - Completed for all available getters across Civil entities #### Other Enhancements - Feature line visualization for gradings - Correct pipe scaling in networks - New labels (e.g., station elevation, parcel) - Bridge object visualization support - ### 2025 - Enhanced object creation and editing support - Improved visualization accuracy - Comprehensive API documentation and user guides ## Industry-specific DWG & DGN solutions Native access to the specialized objects inside DWG and DGN — read them directly, in any application. - [### **Drawings SDK**](https://www.opendesign.com/products/drawings) - ### DGN - Extension2 [### **Civil SDK for DGN**](https://www.opendesign.com/products/civil)Road and corridor objects from Bentley OpenRoads®. + extra line: ↳ Extends Civil SDK (DWG) - ### DWG - Extension [### **Mechanical SDK**](https://www.opendesign.com/products/mechanical)Mechanical design objects from AutoCAD Mechanical®. - Extension [### **Map SDK**](https://www.opendesign.com/products/map3d)GIS and mapping objects from AutoCAD Map 3D®. - Core [### **Architecture SDK**](https://www.opendesign.com/products/architecture)Architectural objects from AutoCAD Architecture®. - Extension [### **Civil SDK**](https://www.opendesign.com/products/civil)Civil engineering objects from AutoCAD Civil 3D®. ## Get started today **Try ODA software free for 60 days. No risk, no credit card required.** [Try for Free](https://www.opendesign.com/free-trial)