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Expand1. Create GSSHA map coverage
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Expand1. Create new coverage from scratch.
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- Select Map Data in the Project Explorer and use the New Coverage right-click command.
- Use the New Coverage dialog to create a new coverage by selecting the desired coverage type, and naming the coverage.
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Expand2. Create new coverage from an existing coverage.
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- Use the Duplicate command on an existing coverage. This will copy any feature objects on the coverage.
- Use the Rename command to give the coverage a new name.
- Change the coverage type.
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Expand2. Stream arc creation
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Expand1. Create feature arcs, nodes and vertices.
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- In the Map module, create feature objects in the active coverage.
- Use the Create Feature Arc
tool to create arcs in the map coverage.
- Begin creating a new arc by clicking in the Graphics Window at either arc end. If clicking on an existing feature node, vertex or arc, the new arc will snap to that object.
- Double-click or press the Enter key to terminate the arc.
- Use the Create Feature Node
tool to create additional nodes alone or to split arcs.
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Expand2. Modify arcs.
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- Feature arcs often need to be edited after initial creation.
Expand3. Split arcs.
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- An existing arc can be split by:
Expand3. Add a new connecting arc.
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- Use the Create Feature Arc
tool to start or end a new arc on an existing arc to split the existing arc into two arcs.
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Expand3. Interpolate elevations to coverage
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Expand1. Convert image data.
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Expand1. Convert raster data to feature contours.
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- Right-click on the raster image and select the Convert To | Feature Contours command to create a new map coverage with elevation contours.
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Expand3. Convert raster data to scatter set.
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- Right-click on the raster image and select the Convert To | 2D Scatter command.
- In the Raster → Scatter dialog, give the scatter set a name and click OK to generate the scatter set.
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Expand5. Convert raster data to flood depth raster.
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- A water surface elevation dataset must be available in the project for this process to function.
- Right-click on the raster image and select the Convert To | Flood Depths command.
- In the Select Geometry and Dataset dialog, select the geometry containing the water surface elevation dataset and then select the water surface elevation dataset.
- Save the new raster with the inundated depth data.
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Expand2. Interpolate image data.
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Expand2. Interpolate raster data to 2D Mesh.
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- Select and make active the mesh where the raster data is to be interpolated.
- Right-click on the raster image and select the Interpolate | 2D Mesh command.
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Expand3. Interpolate raster data to scatter set.
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- Select and make active the scatter set where the raster data is to be interpolated.
- Right-click on the raster image and select the Interpolate | 2D Scatter command.
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Expand4. Interpolate image data to 2D grid.
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- Select and make active the 2D grid where the raster data is to be interpolated.
- Right-click on the raster image and select the Interpolate To | 2D Grid command.
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Expand4. Assign arc properties
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- Select all arcs, right-click, and open the Arc Properties dialog and enter parameters.
- Double-click on most downstream arc, opening Arc Properties dialog, and turn on Most downstream arc of stream network.
- Use Display Options
settings to show arc directions.
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Expand5. Correct arc directions
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If any arcs do not show as flowing towards the most downstream arc, correct it by doing one of the following:
- Right-click on the arc and use the Reverse Arc Direction command
- Or open the Toolbox
and use the Reorient Stream Arcs tool.
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