Add more units of people-per-area

macrovision.js

@@ -173,6 +173,12 @@ math.createUnit("footballFields", {
     prefixes: "long"
 });
 
+math.createUnit("peopleInRural", {
+    definition: "0.02 miles^2"
+})
+math.createUnit("peopleInManhattan", {
+    definition: "15 m^2"
+})
 math.createUnit("peopleInLooseCrowd", {
     definition: "1 m^2"
 })
@@ -397,6 +403,8 @@ const unitChoices = {
             "miles^2"
         ],
         "relative": [
+            "peopleInRural",
+            "peopleInManhattan",
             "peopleInLooseCrowd",
             "peopleInCrowd",
             "peopleInDenseCrowd",