This tutorial shows you how to modify the color scheme of the default signal strength map. If you want to know more about the different map visualization options that Overture provides, you can click here.

We will start by assuming that the steps in the Tutorial have been followed.

The default signal strength map uses a smooth thermographic coloring scheme that changes from red at -70dBm to blue at -110dBm:

Suppose we wish to change this to have a fixed set of bands with the following colors:

Value	Color
Less than -100dBm	Transparent
-100dBm	Blue
-90dBm	Lime
-80dBm	Yellow
-70dBm	Red

To set this up, we need to edit the Map Key of the Signal Strength map. You can find this by selecting the "Signal Strength" entry from the list on the Maps subsection of the Start Page:

Clicking the Properties button will show you the properties of the Signal Strength map:

Click the + button by the Map Key property, and then edit the "Color Value Definitions" property by clicking on "(Collection)" and then clicking the ... button that appears at the end of the row. This will show the Color Value Definition collection editor:

The collection editor has two parts: the list of entries in the collection is shown on the left, and the values of the selected item is shown in the property grid on the right. The description of each entry in the list is composed from the color and value settings. Select each entry in turn and enter the values as below on the right hand side for each:

The list of color value pairs defines the color scheme for the map. In this case, we will be using a "Banded" map, which implies that the color of the band just below the input value will be used as the color on the map (i.e, a value of -85dBm will be colored Yellow, but a value of -90dBm will be colored Blue). To learn more about how color value definitions are used to color a map, see the entry on Map Keys.

Notice the entry at "-100.01 dBm"; this is how we will deal with the requirement to display all values less that -100dBm as transparent.

Click OK to return to the map properties. We also need to change the map into a banded mode, which we can do by setting Map Coloring property to Banded. When this is done, click Back button to return to the Maps page and then click Refresh to redisplay the map with the new coloring:

We can use the Data Browser to verify that the coloring works as expected.