Introduction:
This webinar will be a general overview of the breakline capabilities within LP360. These tools include a wide array of feature vectorization tools such as those needed for hydro enforced DTMs, asset collection, or rail feature extraction. LP360 offers a diverse feature set at an affordable price.
We Will Cover:
- Overview of Aerial LIDAR Workflow
- What Are Breaklines?
- Breaklines are geometry (points, polylines, polygons) added to an elevation model to modify the surface. They are model constraints.
- Why Model Constraints?
- Still water bodies should be flat
- Water should flow down hill
- Islands should be demarcated from surrounding water body
- Road/bridge edges should be polylines
- Retaining walls should show sharp vertical faces
- Water should be at the same level on opposite drain edges
- Road crown should be the high point in the road cross section
- Building footprints should be regular geometric shapes
- Stockpiles should be delineated from surrounding ground
- Point Cloud
- Triangulated Irregular Network (TIN)
- Shaded TIN Model
- GIS TINs are 2D
- Digital Elevation Model
- Model Constraints/ Breaklines- to modify the model, we need to modify the TIN. The surface is modified by adding nodes, edges, and exclusion constraints. These are called breaklines.
- Breakline Creation/ Edit Tools
- Generally called “conflation” tools in LP360:
- Point from surface
- Polyline from surface
- Polygon from surface
- Interactive: comprehensice editing tools that allow you to automatically derive elevation values from the underlying point cloud data as you digitize or edit features
- Batch: Point Cloud Tasks (PCT) that apply various Z conflation rules to feature sets in an automated workflow
- Variable Z from points/surface
- Flattening
- Downstream Constraint
- Retaining Wall
- Double Line Drain (“River Flattening”)
- Automatic “Toe” Creation
- “Out” Areas
- Generally called “conflation” tools in LP360:
- Checking Breaklines
- Wireframe Model
- Feature Analyst
- Locate issues at the vertex level
- LP360 improves your Return On Investment on projects that require breaklines!