First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>
2026-05-08 14:43:16 +08:00
commit 0b64e2de94
10989 changed files with 2253791 additions and 0 deletions
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+import {atan, cos, sin} from "../math.js";
+import {azimuthalInvert} from "./azimuthal.js";
+import projection from "./index.js";
+
+export function stereographicRaw(x, y) {
+  var cy = cos(y), k = 1 + cos(x) * cy;
+  return [cy * sin(x) / k, sin(y) / k];
+}
+
+stereographicRaw.invert = azimuthalInvert(function(z) {
+  return 2 * atan(z);
+});
+
+export default function() {
+  return projection(stereographicRaw)
+      .scale(250)
+      .clipAngle(142);
+}