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  4. Reshape Polygon Command
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  3. GeoHECRAS
  4. Reshape Polygon Command
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  3. Getting Started
  4. Reshape Polygon Command

Reshape Polygon Command

The Reshape Polygons command allows the user to reshape an already drawn polygon or any adjoining polygons that share the same edge. This article describes how to use the Reshape Polygons command.

Reshaping a Single Polygon

Follow the steps below to reshape a single polygon:

  1. From the Map Edit ribbon menu, select the Reshape Polygons command.
    Reshape Polygons ribbon menu command
  2. The Reshape Polygons dialog box will be displayed.
    Reshape Polygons dialog box
  3. Click the [Pick] button. The Reshape Polygons dialog box will temporarily disappear, and a prompt will be displayed on the status bar directing the user to select the polygon to be reshaped.
  4. Select the polygon on the Map View to be reshaped.
  5. The Reshape Polygons dialog box will be redisplayed. The status of the Pick polygon read-only field will change to Selected.
    Pick polygon read-only field

Draw Intersecting Reshape Polyline

This option allows the user to draw a polyline on the Map View that the reshaped polygon should follow. The drawn polyline must intersect the polygon two or more times. If both polyline endpoints are inside the polygon, the intersecting area is added to the polygon. If both polyline endpoints are outside the polygon, the intersecting area is removed from the polygon.

  1. Choose the Draw Intersecting Reshape Polyline radio button option and click the [Draw] button. Note that the Draw Intersecting Reshape Polyline radio button option is selected by default.
    [Draw] button
  2. The Reshape Polygons dialog box will temporarily disappear, and a prompt will be displayed on the status bar directing the user to draw a trace polyline.
  3. Draw the reshape polyline on the Map View representing the change in shape for the selected polygon. Then, press the [Enter] key or right-click and select Done from the displayed context menu.
  4. The Reshape Polygons dialog box will be redisplayed. The status of the Draw reshape polyline read-only field will change to Drawn.
    Draw reshape polyline read-only field
  5. Click the [OK] button.
  6. The software will reshape the selected polygon.

Use Intersecting Trace Polyline

This option allows the user to select an already existing polyline on the Map View that the reshaped polygon should follow. The selected polyline must intersect the polygon two or more times. If both polyline endpoints are inside the polygon, the intersecting area is added to the polygon. If both polyline endpoints are outside the polygon, the intersecting area is removed from the polygon.

  1. Choose the Use Intersecting Trace Polyline radio button option and click the [Pick] button.
    [Pick] button
  2. The Reshape Polygons dialog box will temporarily disappear, and a prompt will be displayed on the status bar directing the user to select the trace polyline that intersects with the polygon to be reshaped.
  3. Select the trace polyline on the Map View.
  4. The Reshape Polygons dialog box will be redisplayed. The status of the Pick trace polyline read-only field will change to Selected.
    Pick trace polyline read-only entry
  5. Click the [OK] button.
  6. The software will reshape the selected polygon.

Reshaping Adjacent Polygons

Follow the steps below to reshape the polygon boundary between two adjacent polygons.

  1. Open the Reshape Polygons dialog box and select the Adjacent Polygons panel.
    Adjacent Polygons panel
  2. Click the [Pick] button. The Reshape Polygons dialog box will temporarily disappear, and a prompt will be displayed on the status bar directing the user to select two adjacent polygons with a common boundary to be reshaped.
  3. Select two adjacent polygons on the Map View to be reshaped.
  4. The Reshape Polygons dialog box will be redisplayed. The status of the Pick two adjacent polygons read-only field will change to Selected.
    Pick two adjacent polygons read-only field

Note that the Draw Intersecting Reshape Polyline and Use Intersecting Trace Polyline options work similar to what is provided in the Single Polygon panel. These options allow you to either draw or select an already existing intersection trace polyline from the Map View.

After clicking the [OK] button the software will reshape the common boundary of two adjacent polygons along the intersecting trace polyline.

About the Author Chris Maeder

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