Percent Coverage by Region with Multiple Area Targets

This article assumes that you have already created a Coverage Definition object with two or more custom area targets as the regions, with the area targets overlapping each other. When creating a custom region from two or more area targets, STK combines the area targets into a single region before creating the coverage grid. There are two ways you can find the percent coverage for each of the regions. Method 1 is simpler, but not as precise.

Method 1

1. Create a separate Coverage Definition object for each area target.
2. Next, create a Percent Coverage report. When you do this, the grid points for each individual Coverage Definition object may be in slightly different locations compared to the single Coverage Definition object defined by two or more regions. The lower the point granularity in the Coverage Definition, the less this disparity will affect the results.

Method 2

1. Open the Coverage Definition properties browser.
2. On the Basic - Grid page, the Type should already be set to Custom Regions. Click the Select Regions button to open the Select Regions dialog box.
3. Clear the Check for holes check box. STK will now include the grid points in all of the regions of the coverage.
4. Next, right-click the Coverage Definition object and select Coverage Definition > Grid Inspector. 
5. In the Grid Inspector dialog box, set Action to Select Region. 
6. Click each region in the 2D Graphics window to see its percent coverage value.

You can follow these same steps to get a report on any Figure of Merit!