Calculate % of Earth covered using Mapping Toolbox

The image shows my coverage, but I'm wondering if there is a way to use MATLAB/Mapping Toolbox to calculate the percentage of the Earth that is covered by the red markers.

Thank you.

[KSSV]

image is missing...

Answer 1

[Paul Huter]

I solved this by creating a polygon as follows:

area = sum(areaint(latQ, lonQ, spheroid));

And then finding the ratio to the Earth's area:

ratio = 100 * (area/5.101e8);