init

2026-10-21 19:32:02 -04:00
commit b74d278c8e
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+module.exports = Ellipsoid;
+
+function Ellipsoid(options) {
+    options = options || {
+        a: 6378.137,
+        b: 6356.7523142,
+        fla: 1 / 298.257223563,
+        re: 6371.2
+    };
+
+    this.a = options.a; // semi-major axis
+    this.b = options.b; // semi-minor axis
+    this.fla = options.fla; // flattening
+    this.re = options.re; // mean radius
+    this.eps = Math.sqrt(1-(this.b*this.b)/(this.a*this.a)); // first eccentricity
+    this.epssq = this.eps*this.eps; // first eccentricity squared
+}