Bentley Communities
Bentley Communities
  • Site
  • User
  • Site
  • Search
  • User
OpenRoads | OpenSite
  • Product Communities
OpenRoads | OpenSite
OpenRoads | OpenSite Wiki Create Terrain from Point Cloud TIN and Tile Filters
    • Sign In
    • -Road and Site Design - Wikis
      • -OpenRoads Designer
        • +Training
        • +Basic Settings
        • -Terrain Modeling
          • OpenRoads Designer Exclude from Triangulation
          • Importing Lidar Data
          • Video: Interoperability between Reality Modeling and OpenRoads Modeling in OpenRoads Designer
          • Video: Aqua-planning in OpenRoads Designer
          • Video: Import .3mx data into OpenRoads Designer and create a terrain
          • Video: Import Chainage-offset data into OpenRoads Designer
          • Video: Add Break Line feature to a Terrain Model
          • Video: Create a Pond Terrain
          • Video: Create Delta Terrain Model
          • Video: Create from Elements and Analyze Volume
          • Video: Create Terrain from DTM File
          • Video: Create Terrain from Fence Point Cloud
          • Video: Create Terrain From Graphical Filter
          • Video: Create Terrain from TIN File
          • Video: Creating a HEC-RAS cross section file (.geo)
          • Video: Display Terrain Contours and Labels
          • Video: Edit Terrain Model Tools
          • Video: How to add multiple breaklines to a terrain via a selection set
          • Video: How to Create Tower Yard Terrain Model
          • Video: How to develop a fill stage terrain for a tunnel design
          • Video: Label Terrain Contours and Spots
          • Video: Add Interior Boundary Feature ORD
          • What are Terrain Model Rules?
          • What is a Terrain Model?
          • Why can we not assign a Mesh Feature Definition to a Terrain Model?
          • Cannot sign-in to ArcGIS to use Topo Import - ESRI
          • Create Terrain from File - Landxml import options
          • Create Terrain from Point Cloud TIN and Tile Filters
          • Failed to Convert message when trying to Convert LAS to POD
          • How do you drape a feature onto a terrain to assign draped elevations?
          • How to remove a feature from a Terrain Model created from a TIN or a DTM
          • Terrain Feature Display reverts back to original display when it is reprocessed
          • Topo Import - USGS Terrain
          • Unable to Delete Triangle Edges
          • Video - OpenRoads Designer - How to show Tooltip on Scalable Terrain Model
          • Video: Analyze Trace Slope for OpenRoads Designer
          • Video: Change Display Units of Analyze Volumes
          • Video: Create Clipped Terrain Model
          • Video: Create Complex Terrain Model
          • Video: Create Terrain from Corridor Elements
          • Video: Create Terrain from Corridor Top Mesh
          • Video: Create Terrain Model from ASCII
          • Video: Creating a Terrain Model from LiDAR Data
          • Video: Display Pass Through Contours using the Analyze Point Command
          • Video: Display Thematic Slopes
          • Video: Drape Raster Images onto Terrain Model Triangles
          • Video: Export terrain model to InRoads dtm in OpenRoads Designer
          • Video: How to display a terrain model in an OpenRoads Designer profile model.
          • Video: How to know the elevation of a terrain model at a given station and offset of an alignment?
          • Video: Incremental Elevations Along Feature
          • Video: OpenRoads Designer: Create Terrain from ASC file
          • Video: Thematic:Height Display Style to view Color Coded Elevations of Terrain
          • Video:OpenRoads Designer-How to use 3SM file as a Terrain in Profile
          • Wiki:OpenRoads Designer[Terrain]: Shifting complete Terrain in Z direction
        • +Geometry CONNECT
        • +Model Analysis & Reporting
        • +Corridor Modeling
        • +Model Detailing
        • +Drawing Production
        • +Drainage and Utilities
        • +Survey CONNECT
        • +Civil Cells CONNECT
        • +How To Wikis
        • +Installation CONNECT
        • +ProjectWise Integration
        • +Workspace
        • +Troubleshooting Various Issues
        • +MX to OpenRoads Designer Equivalence Videos
        • Downgrade Civil Model
        • Remove Civil Model
        • Civil File Manager
        • Bentley Civil Québec
        • "Error reading the Feature XML File" in the Features XML To/From Excel
        • Bentley Civil User Accreditation - Program Overview
        • How to turn off display of inactive topology?
        • Migrating Project Data to OpenRoads Designer
        • OpenRoads Designer Workflow - Voice Command
        • Workspace error when working with Subsurface Utilities in OpenRoads Designer
        • Textual manipulators missing for survey data
        • Unable to Open Utility Properties for catchment areas
        • When opening a file, it closes right away
        • Downgrade DGN - Replacement utility for 'Downgrade Civil Model'
        • Download for OpenRoads Designer 10.10.01.03
        • +DWG/DXF
        • Environment ERROR in OpenRoads/Rail/Site Designer
        • OpenRoads - OpenRail - OpenSite Ideas
        • +VBAs and DLLs for Custom Functions
      • +OpenRoads ConceptStation
      • +OpenRail Designer
      • +OpenSite Designer
      • +OpenRoads Navigator Mobile App
      • +SS10/SS4/SS3 OpenRoads
      • +GEOPAK Native
      • +InRoads Native
      • +MX Native
      • +OpenRoads SignCAD

     
     Questions about this article, topic, or product? Click here. 

    Create Terrain from Point Cloud TIN and Tile Filters

    Product(s): OpenRoads Designer, OpenRail Designer, OpenSite Designer
    Version(s): 10.08+
    Area:  Terrain

    Question:

    What is the difference between the TIN filter and the TILE filter when importing LIDAR data into Data Acquisition?

    Answer:

    Tile Filter 

    Uses an algorithm that divides the LIDAR data set into tiles. A best fit plane is calculated for each tile, and LIDAR points are removed if they fall within the user set Z tolerance to the plane.

    Z Tolerance - common to both algorithms and is basically the variation in the Z coordinate that the surface is allowed to move during the filtering process.  Typically for the first invocation of the filtering function, the Z tolerance should be set from 0.5 to 1.0 for imperial data sets and from 0.25 to 0.5 for metric data sets.  Depending on the outcome and the desired result, the Z tolerance can be varied up or down.

    Min. Tile Points - specifies that a tile will not be subdivided if it has less than this number of points.  Typically this is set to five.

    Max. Tile Divisions - the allowable level of recursion allowed and is the number of time the initial tiling set can be subdivided.  Typically this is set to five.

    Start Tile Length – The LIDAR data set is initially divided into tiles of this size, prior to recursion to the minimum tile points. The setting of this parameter requires some knowledge of the distance between the LIDAR points, which requires an inspection of the LIDAR points in MicroStation to determine.  Typically set this to 10 times the distance between the LIDAR points.


    TIN Filter 

    First separates the LIDAR points into tiles with a maximum of 2 million points and then repetitively triangulates each tile, filtering out points.  The TIN Filter algorithm filters out the points if they fall within the user set Z tolerance of the triangle planes.

    Coarse Filter (TIN option only) – Filter fewer points with some blurring of ridges and valleys

    Fine Filter (TIN option only) – Filters more points with less blurring of ridges and valleys

    Points Before Filter/Points After Filter/Reduction % - Display of the number of points before and after filtering, plus the percentage reduction of points from before and after

    • Share
    • History
    • More
    • Cancel
    • Kevin McDonald Created by Bentley Colleague Kevin McDonald
    • When: Wed, Jul 21 2021 10:10 AM
    • Kevin McDonald Last revision by Bentley Colleague Kevin McDonald
    • When: Wed, Jan 19 2022 9:37 AM
    • Revisions: 4
    • Comments: 0
    Recommended
    Related
    Communities
    • Home
    • Getting Started
    • Community Central
    • Products
    • Support
    • Secure File Upload
    • Feedback
    Support and Services
    • Home
    • Product Support
    • Downloads
    • Subscription Services Portal
    Training and Learning
    • Home
    • About Bentley Institute
    • My Learning History
    • Reference Books
    Social Media
    •    LinkedIn
    •    Facebook
    •    Twitter
    •    YouTube
    •    RSS Feed
    •    Email

    © 2023 Bentley Systems, Incorporated  |  Contact Us  |  Privacy |  Terms of Use  |  Cookies