Index: node_modules/d3-geo/src/projection/cylindricalEqualArea.js
===================================================================
--- node_modules/d3-geo/src/projection/cylindricalEqualArea.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-geo/src/projection/cylindricalEqualArea.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,15 @@
+import {asin, cos, sin} from "../math.js";
+
+export function cylindricalEqualAreaRaw(phi0) {
+  var cosPhi0 = cos(phi0);
+
+  function forward(lambda, phi) {
+    return [lambda * cosPhi0, sin(phi) / cosPhi0];
+  }
+
+  forward.invert = function(x, y) {
+    return [x / cosPhi0, asin(y * cosPhi0)];
+  };
+
+  return forward;
+}