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The objective here is to create a set of square kml coordinates centered on a point. I use this to create a square map centered on a mountain peak and then turn that into a STL that I can 3D print....
#2: Post edited
by
Moshi
·
2020-11-08T19:56:04Z (about 4 years ago)
#1: Initial revision
by
Charlie Brumbaugh
·
2020-10-25T20:00:19Z (about 4 years ago)
PHP script to create a KML square centred on a point.
The objective here is to create a set of square kml coordinates centered on a point. I use this to create a square map centered on a mountain peak and then turn that into a [STL that I can 3D print](https://outdoors.codidact.com/questions/278127).
```
<?php
echo "Enter Latitude\n";
$handle = fopen("php://stdin", "r");
$lat = deg2rad(trim(fgets($handle)));
fclose($handle);
echo "Enter Longitude\n";
$handle = fopen("php://stdin", "r");
$long = deg2rad(trim(fgets($handle)));
fclose($handle);
echo "Enter Distance\n";
$handle = fopen("php://stdin", "r");
$meter = trim(fgets($handle));
fclose($handle);
$kml .= "<coordinates>";
$d_rad = $meter / 6378137;
$i = 45;
for ($loop = 0; $loop <= 4; $loop += 1) {
$radial = deg2rad($i);
$lat_rad = asin(sin($lat) * cos($d_rad) + cos($lat) * sin($d_rad) * cos($radial));
$dlon_rad = atan2(sin($radial) * sin($d_rad) * cos($lat), cos($d_rad) - sin($lat) * sin($lat_rad));
$lon_rad = fmod(($long + $dlon_rad + M_PI), 2 * M_PI) - M_PI;
$kml .= rad2deg($lon_rad) . "," . rad2deg($lat_rad) . ",0 ";
$i += 90;
}
$kml .= "</coordinates>\n";
echo $kml;
```