Gridded data layers are available in the Visualization and Modeling modules when grid sets (e.g., precipitation, temperature, snow) have been created or computed for the watershed. These grid sets are generated using HEC-MetVue and are grouped within the Gridded Data Layer.
Accessing Grid Set Properties
You can customize how grid sets appear and set the visualization scale for the Gridded Data Layer.
In the Map Layers editor, right-click on the name of the grid set (e.g., Observed Precipitation).
From the shortcut menu, click Properties to open the Grid Display Options dialog.
Grid Display Options
Within the Grid Display Options dialog, you can:
Select a color contour scheme (default is Precipitation)
Set tic intervals
Override the minimum and maximum values for the contour limits.
Clicking Advanced expands the dialog to reveal more options:
Brightness: Adjust the lightness/darkness of colors (from full color to black).
Saturation: Control color intensity (from white to full color).
Transparency: Modify layer opacity (from fully opaque to fully transparent).
Aspect Shading: Changes display color based on viewing angle.
Adjust Color Scale to Clipping Area: Rescales the color ramp based on the clipping area's min/max values.
Setting the Visualization Scale
To adjust when the Gridded Data Layer is visible based on zoom level:
In the Grid Display Options dialog, go to the Scale tab.
By default, the gridded data layer is set to Always show layer.
To limit visibility to certain zoom levels, select Only show layer in the following scale range.
To make the layer visible as you zoom in, click Set to Current and enter a value in the Only visible below 1: field.
To make the layer visible as you zoom out, click Set to Current and enter a value in the Only visible above 1: field.
