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  4. Stamp Multiple Command

Stamp Multiple Command

The Stamp Multiple command allows the user to perform bulk stamp geometry operations. Similar to the Stamp Geometry command, this command allows the user to define multiple stamp geometry operations to be applied at one time to the terrain surface. This allows the stamp terrain modifications to be defined before applying the changes to the terrain. To learn more about Stamp Geometry command, refer to this article in our knowledge base.

The Stamp Multiple command is helpful in situations where the user may need to edit the terrain surface multiple times—especially when working with large DEM files where stamping one feature causes the entire terrain surface to be recreated each time.

The command supports various options for defining the stamping operation, including:

  • Terrain cut or fill
  • End cap styles
  • Interpolation path
  • Starting and ending elevations
  • Template or user-defined cross section

The user can specify the merge order of the stamp operations, which will determine the stamp order of the composite terrain surface. In addition, the user can edit and modify the defined stamp geometry entities so that an iterative, trial and error approach can be used in constructing the updated terrain surface.

For example, the below image shows three false dams in the running ditch that need to be removed. The Stamp Multiple command can be used to remove all three false dams simultaneously.
Stamp Multiple exampleTo use the Stamp Multiple command, follow the steps below:

  1. From the Terrain ribbon menu, select the Stamp Multiple command.
    Stamp Multiple Command
  2. The Stamp Multiple dialog box will be displayed.
    Stamp Multiple dialog boxThe following sections describe how to interact with the above dialog box.

General Specifications

From the Terrain surface dropdown combo box, the user can select a source terrain file from the existing elevation layers within the current project. The elevation layer which is used in extracting cross sections and 2D model elevation data is selected by default.
General Specifications

Define Stamp Operations

This section presents a table summarizing the assigned stamp operations. This table appears after the user has defined the terrain interpolation path so that multiple stamp operations can be displayed.
Define Stamp OperationsThis Assigned stamp operations table displays the list of stamp operations assigned. This table includes the Name, Operation Type, Defined Elevations, and XS Stamp Shape of the assigned stamp operations. In the first column, the user can change the name by clicking on the pencil icon and checking the appropriate checkboxes required for an operation. The last column allows the user to delete, move up/down, or zoom to a particular stamp operation. The user can add additional stamp operations by selecting the next row. The type, elevation, and shape of the corresponding stamp operation can be defined using the following sections:

  • Define Operation
  • Define Path
  • Define Elevations
  • Define Shape

Define Operation

This section defines the general parameters used to stamp terrain geometry and the type of stamping operation.
Define Operation tabFrom the Terrain stamping operation dropdown combo box, select the type of stamping operation. The following options are available:

  • Terrain Cut: This option cuts the terrain geometry to burn-in a channel where one is missing, or to remove a false dam, etc.
  • Terrain Fill: This option fills in a levee or a dam structure, where one is proposed, by stamping it on the terrain geometry.

Note that the Fill void space below terrain cut and the Leave existing ground above terrain checkboxes are checked by default. They facilitate creating a more accurate representation of the stamped terrain geometry by daylighting the stamping operation into the source terrain geometry.

Define Path

This section defines the path to which the terrain surface stamping is to be applied.

There are two options for defining the path:

  • Assign polyline: This option allows the user to select a polyline from the Map View and use it to define the terrain interpolation path.
  • Draw polyline: This option allows the user to interactively draw a polyline on the Map View and use it as the terrain interpolation path.

If there is an existing polyline on the Map View that can be used for the stamping operation, the user can click the [Pick] button adjacent to the Assign polyline radio button and select a polyline from the Map View.
Define Path tab – Assign PolylineAlternatively, the user can click the [Draw] button adjacent to the Draw polyline radio button to draw a polyline on the Map View.
Define Path tab – Draw PolylineThe Create curvilinear polygon checkbox can be used to create a smooth terrain interpolation path while drawing the polyline.

Define Elevations

This section defines how the interpolated terrain elevations will be assigned along the polyline path.
Define Elevations tabThere are four radio button options for defining how the elevations are assigned:

  • Interpolate using end point elevations: This option allows the user to use the elevations at the ends of the assigned/drawn polyline and then cuts or fills-in the terrain geometry while automatically interpolating the elevation along the polyline path. The software also calculates the longitudinal slope using start and stop points and displays the value in the Longitudinal Slope (V:H) read-only field. The total length of the assigned (or drawn) polyline will be displayed in the Length field.
  • Use constant elevation: This option defines a specific elevation that will be applied across the terrain interpolation path.
  • Use start point elevation and slope: This option sets the starting point elevation of a polyline that can be used to cut or fill terrain geometry, but the stopping point elevation remains fixed.
  • Use stop point elevation and slope: This option sets the stopping point elevation of a polyline that can be used to cut or fill terrain geometry, but the starting point elevation remains fixed.

The user can first click the [Retrieve] button to automatically extract the start and end elevation values, length, and slope data for the selected polyline and then choose any of the above options to define the way elevations will be interpolated along polyline paths.

Define Shape

This section defines how the interpolated terrain region will be shaped along the polyline path. There are two options for defining the interpolation path shape. The user can either choose the Use end point terrain geometry or the Use trapezoid geometry option.

  • Use end point terrain geometry: This option uses the terrain geometry at the two ends of the assigned/drawn polyline. This software will then interpolate the shape of the cut/fill along the polyline path.
    By default, the Cross section sample width (entire width) is set to 0 ft. However, the user can define a new value or click the [Pick] button and then measure the width from the Map View.
    Define Shape tab – Terrain geometry
  • Use trapezoid geometry: This option uses the user-defined values to create a trapezoidal shape along the polygon path.
    By default, the Terrain path width (flat section) is set to 50 ft (15 m). However, the user can define a new value or click the [Pick] button, then measure it from the Map View.
    Define Shape tab – Trapezoid geometryThe Side slope (V:H) ratio value is set to 1:1 by default, which corresponds to a 1 ft (m) rise to a 1 ft (m) run. A ratio of 1:0 represents a vertical wall. However, many times a flatter slope is required, such as 1:2 or 1:3. The user can define the ratio to represent the slope.
    The Start path end-cap type and End path end-cap type dropdown combo boxes allow the user to choose different end cap styles from the following options:
    • Flat Sloped
    • Flat Vertical (default)
    • Round Sloped
    • Wingwall Vertical
      Note that the sloped end cap option causes the defined side slope to be applied on the end cap. The vertical end cap option has no side slope and is vertical.
      End Cap Types

Create New Terrain Surface

This section is used to define the specifications of the revised terrain grid.
Create New Terrain SurfaceClick the […] browse button for the Terrain file entry to specify the file name and directory location to save the revised terrain grid file.

By default, the Load terrain as map layer checkbox option is checked to load the revised terrain grid as a layer in the Map Data Layers panel. Click the pencil icon to rename the layer.

The user can select the CRS to be used for the revised terrain grid. By default, the software uses the project CRS.

The user can check the Overwrite existing terrain layer checkbox option to overwrite an existing terrain layer (if one exists) with the revised terrain layer.

After the options for stamping the terrain geometry have been defined, click the [Apply] button and the software will generate the revised terrain grid and, as an additional option, load the DEM file as a layer in the Map Data Layers panel.

About the Author Chris Maeder

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