Input

Terrain Task

Click on the "Terrain Task" control, a dropdown-list with all available Terrain tasks will appear. Select the Terrain task that is created to support the analysis at hand.

Note: If a Terrain task already has been selected and you wish to change it, the current selection will be marked with an arrow in front of the task.

Road Models

Select the Road Model(s) that are subject to the analysis at hand.

Grid Size
Change the grid size to whatever you deem appropriate, but keep in mind that the selected value also is used for the "Combined model". The extent of this "Combined model" is limited by the Bounding Box and is used by the "Flooding Tool" and "Virtual Flow Path" functions. If the extent of the Bounding Box is large, a small grid size will at some point affect the computation speed and the overall performance of the computer.

Tip: Not knowing what the optimal value should be, it is a good strategy to start with a larger value and incrementally reduce the size until it reaches it's "breaking point".

Elevate Objects (optional)

Select objects to elevate in the grid model. Only closed polygon objects exceeding the size given under Settings will be included. All grid points inside a valid polygon will be elevated.

Run

Generates the first part of the Watershed Model by calculating Fillsink and Flow Accumulation values. The output will display an Elevation Map and highlight cells that have been manipulated with Fillsink calculations.

Edit Bounding Box

The Bounding Box (aka Area of Interest) has a default size given by the extent of Drainage Lines from the Terrain task intersecting the Road Model(s). Using this tool one can adjust the size of the Bounding Box and limit the calculation area on larger models.

Activate the tool - a guiding menu in the upper right corner will show you the available options:

• Drag the handles to resize manually

• Press Ctrl + M, drag the entire box and press a mouse button to release

• Press Ctrl + X to maximize the extent

• Press ESC to cancel

• Press ENTER to save

Note: You should not be allowed to drag or resize the Bounding Box outside the maximum extent