Skip To Content

Edit data contributing to a TIN

Available with 3D Analyst license.

You can edit existing triangulated irregular networks (TINs) and add any supplemental data you may have acquired. If you have a TIN surface representing the study area and you have data that shows how the surface has changed since the TIN was constructed, you can add these features to the TIN with the option to save it as a new TIN. For example, line feature classes that represent roadways that have been constructed or new elevation data, such as point feature classes, that show mining excavation in the study area.

The process of editing TIN surfaces with geoprocessing tools involves adding new feature classes to an existing TIN, reducing TIN nodes, or redefining the data area. The existing TIN may already have features in it, or it may be an empty TIN with no feature classes. Editing TIN surfaces using geoprocessing does not involve changing attributes or values of nodes or triangle faces. You can edit a TIN from the map or scene view in ArcGIS Pro.

Add data to a TIN

Add features from one or more input feature classes to a TIN.

  1. Select a TIN layer in the Contents pane.
  2. On the Data tab, in the Management group, click Load Data.
  3. The Edit TIN geoprocessing tool opens in the Geoprocessing pane. Browse to the Input TIN.
  4. Choose the Input Feature class with which you want to edit the TIN, and set the desired parameters.
  5. Optionally, choose Constrained Delaunay if you want the TIN to use this type of triangulation.
  6. Click Run.

Redefine the data area of a TIN

You can redefine the data area or interpolation zone of a TIN based on its triangle edge length.

  1. Select a TIN layer in the Contents pane.
  2. On the Data tab, in the Management group, click Delineate Data Area.
  3. The Delineate TIN Data Area geoprocessing tool opens in the Geoprocessing pane. Browse to the Input TIN.
  4. Choose the Maximum Edge Length.
  5. Optionally, choose a Method.
  6. Click Run.

Decimate nodes of a TIN

You can create a TIN dataset using a subset of nodes from a source TIN.

  1. Select a TIN layer in the Contents pane.
  2. On the Data tab, in the Management group, click Decimate Nodes.
  3. The Decimate TIN Nodes geoprocessing tool opens in the Geoprocessing pane. Browse to the Input TIN.
  4. Choose the Output TIN.
  5. Choose the Decimation Method, either Z Tolerance or Count.
  6. Optionally, set the Maximum Number of Nodes.
  7. Optionally, choose to Copy Breaklines.
  8. Click Run.

Related topics