If the map layer you wish to configure is a USGS Digital Line Graph map (.dlg), selecting *Properties from the map will open the USGS Digital Line Graph Editor ("Figure: USGS Digital Line Graph Editor for DLG Map Layer - Properties Tab"). When ResSim loads with a dlg file, it automatically creates a dlgbin file for use within the watershed. The dlgbin file contains the dlg information in binary form as well as your drawing properties.

Figure: USGS Digital Line Graph Editor for DLG Map Layer - Properties Tab

On the Properties tab of the USGS Digital Line Graph Editor, you can modify the following drawing attributes:

  • Default Color—the button open a Color Chooser (Figure B.39) from which you can select the color you want the elements in your map drawn.
  • Draw Nodes,
    Draw Lines,
    Draw Areas—use the checkboxes to turn ON or OFF the drawing of the nodes, lines, or areas in your map.
  • Saturation—Control the intensity of the color used to draw the elements in your map by entering a decimal value between 0 and 1. The default value is 1.
  • Brightness—Control the amount of white in the color used to draw the elements in your map by entering in a decimal value between 0 and 1. The default value is 1.

On the Scale tab of the USGS Digital Line Graph Editor ("Figure: USGS Digital Line Graph Editor - Scale Tab"), you can specify how the map will be displayed based on zoom level:

Figure: USGS Digital Line Graph Editor - Scale Tab

  • Always show layer—by default, the digital line graph layer is set to always display, regardless of the zoom level.
  • Only show layer in the following scale range—select this radio button if you want the map to display only for specific zoom ranges:
  • Only visible below 1: To set the scale (zoom range) so that the digital line graph layer becomes visible as you zoom-in, you can set the scale to the current scale by clicking Set to Current or enter a value in the box.
  • Only visible above 1: To set the scale so that the digital line graph layer becomes visible as you zoom-out, you can set the scale to the current scale by clicking Set to Current or enter a value in the box.