Elevation Inset

The Elevation Inset tool allows for the creation of a high resolution inset from an elevation raster.

Inset Layer Creation

_images/image31.png

To create a new elevation inset layer, do the following.

  1. In the Elevation Editor, click Create Inset...
  2. Choose values for:
  • Output Path
  • File Format
  • Data Type
  • Origin
  • Pixel Dimensions
  • Resolution
  1. To sample an existing elevation layer, choose the layer to sample from the Sample Existing Layer dropdown.
  • If not sampling an existing elevation layer, choose an Initial Elevation value.
  1. The new layer will be added to the top of the Project Browser.

Terrain Leveling

There are two primary methods for elevating areas.
  • Interactive Selection - allows the user to define a polygonal shape using the mouse cursor.
  • Selected Features - allows the use of an areal feature to define the polygon shape used for the elevate area selection.

Elevation Methods common to both Interactive Selection and Selected Features

  • Select the Elevation Method from the following:
    • Fixed - Sets an exact elevation for all points in the defined area.
    • Sloped - Allows the user to define a slope with a beginning A and end B which will create a slope from point A to point B. If the slope line is defined within the shape, any points beyond A or B will be assigned their respective values to their nearest defined point. So all points within the area, but prior to A will be set at the value A. Likewise, all points within the area, but beyond B will be given the value B.
    • Center of Feature - Sets the elevation for all points in the defined area to the elevation value at the center of the feature.
    • Average of Border - Sets the elevation for all points in the defined area by taking the average elevation of all the border point’s elevation values.
    • Min of Border - Sets the elevation for all points in the defined area to that of the border’s lowest elevation point value.
    • Max of Border - Sets the elevation for all points in the defined area to that of the border’s highest elevation point value.

Interactive Selection

  1. In the Elevation Editor, click Elevate Area.
  2. Select the desired elevation raster layer.
  3. Select Interactive Selection in the Elevate Using dropdown.
  4. Press the Define area button.
  5. Using the crosshair cursor, draw the appropriate shape on the 2D Map. Double click the final point to close the shape. elevate_area_polygon_defined_area
  6. Select a Smooth Range (The Smooth Range defines the outer padding that will be added to the user-defined shape that was drawn. This allows the user to define a smooth transition between the defined shape and the surrounding elevation. For example, a range of 10 would create a gradual slope extending outward 10 meters in all directions from the original polygonal shape which would level out with the surrounding elevation.)
  7. Select an Elevation Method (described above).
  8. (Applies to sloped method only) Using the crosshair cursor, select the start and end points of the terrain slope. These are indicated with A and B.
  9. (Applies to sloped method only) Enter the Elevation at A and Elevation at B values.
  10. Click Apply.
  11. Changes will be shown in 2D and 3D.
_images/elevate_area_interactive_selection.png

Selected Feature

  1. In the Elevation Editor, click Elevate Area.
  2. Select the desired elevation raster layer.
  3. Select Selected Feature in the Elevate Using dropdown.
  4. Select a feature in the map window (see Selecting a Feature.)
  5. Select the Feature Layer associated with the selected feature.
  6. Select a Smooth Range (The Smooth Range defines the outer padding that will be added to the user-defined shape that was drawn. This allows the user to define a smooth transition between the defined shape and the surrounding elevation. For example, a range of 10 would create a gradual slope extending outward 10 meters in all directions from the original polygonal shape which would level out with the surrounding elevation.)
  1. Select an Elevation Method (described above).
  • Elevation methods specific to Selected Feature * Attribute Table - In addition to the elevation methods listed above, you may also define the elevation based on a value from the attribute table.

    • Select Attribute Table from the Elevation Method dropdown.
    • Select the appropriate column where the values are stored.
    • Sets the elevation for all points in the defined area to the elevation value defined by the attribute value.
      • Note: Non-numeric values or string values that cannot be converted to numeric values will be ignored and the process will fail.
  1. (Applies to sloped method only) Using the crosshair cursor, select the start and end points of the terrain slope. These are indicated with A and B.
  2. (Applies to sloped method only) Enter the Elevation at A and Elevation at B values.
  3. Click Apply.
  4. Changes will be shown in 2D and 3D.
_images/elevate_area_selected_features.png

_images/elevate_area_selected_features_with_preview.png

Brush Modes

  • Raise will add elevation to the painted area.
  • Lower will remove elevation from the painted area.
  • Set Elevation will apply a fixed elevation to the painted area.
    • To set a fixed elevation value, middle click the mouse on the desired area. This will sample the elevation. Alternatively, enter the value into the Elevation Editor panel.