Calculate the area from a polygon

1

Hi,

I’m looking for a way to calculate the area from a polygon.
Do you have this feature on the Sentinel API?

It would shorten some of our work.

Thanks

2

Hello,

Sharing the alternative that I used to solve the problem.
Basically is the sum of the products of the vertices

With a closed polygon, my script looked something like this:

$max_i = $total_rows - 1;
$i = 0;
$area = 0;
while ($i < $max_i){
    $area = $area + (($x[$i] * $y[$i+1]) - ($y[$i] * $x[$i+1]));
    $i ++;
}
if ($area < 0){ $area = $area * -1; }
$area = $area / 2;

Source:
https://www.mathopenref.com/coordpolygonarea.html

2 Likes
3

There are some solutions available here as well: