FlashMNT is a powerful land modeling and calculation plugin developed by DeliCAD that integrates directly into AutoCAD and BricsCAD. It allows surveyors, civil engineers, and designers to build Triangulated Irregular Network (TIN) Digital Terrain Models (DTM) from drawing data, perform volumetric calculations, and generate geographic profiles. 1. Preparation of Source Data
Before generating a terrain model, ensure your DWG file contains clean, structured spatial coordinates. FlashMNT constructs surfaces from two primary object types:
3D Points / Blocks: Survey points imported using plugins like FlashPoints or standard text coordinates (
Breaklines: Linear 3D entities (like polylines representing ridges, ditches, or retaining walls) that dictate strict geometric transitions across the terrain mesh. 2. Generating the Digital Terrain Model (DTM)
Once the underlying point cloud or geometry is isolated onto organized layers, the DTM calculation wizard handles triangulation:
Launch FlashMNT: Open the application menu or ribbon within your active AutoCAD or BricsCAD workspace.
Select Source Objects: Choose whether to build the model from raw points, explicit 3D faces, or contours. Define Triangulation Constraints:
Set a Maximum Edge Length constraint to prevent the algorithm from creating inaccurate triangles across large gaps or empty boundaries.
Designate existing 3D linear elements as Breaklines to ensure the mesh steps accurately at elevation anomalies.
Compute Mesh: Run the generator. The software rapidly establishes a surface mesh across the coordinates. 3. Analysis, Contours, and 3D Computations
After the foundational DTM mesh is placed, FlashMNT provides secondary tools to interpret and modify the surface data:
Contour Line Generation: Automatically generate major and minor topographic contours by defining the vertical interval step. You can filter specific elevations, choose curve smoothing variations, and automatically attach elevation labels.
Color Mapping: Dynamically color-code the terrain mesh based on altitude bands or slope angles for immediate visual relief assessment.
Cut and Fill Volumetrics: Compare the generated 3D surface against a second design plane or altered terrain to calculate exact earthwork mass volumes.
Terrain Profiles: Extract longitudinal or cross-sectional view slices of your terrain model along a defined centerline polyline path.
If you are currently setting up a topography project, let me know what format your raw terrain data is in (e.g., a .txt point file, 2D contours, a .dxf mesh) or which specific version of AutoCAD or BricsCAD you are hosting the software on so I can provide more targeted configuration tips. FlashMNT: Digital Terrain Modeling, DTM – DeliCAD.com
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