Added code to compute total land area within each buffer and store it…

… in the GeoJson as per #5
dcfemtech · Aug 22, 2016 · b9cb67f · b9cb67f
1 parent d5cca36
commit b9cb67f
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/scripts/generate-buffers.js b/scripts/generate-buffers.js
@@ -51,6 +51,11 @@ function done(error, name) {
 function generateBuffer(geojson, distanceInMiles, fileName) {
     console.log('generating ' + fileName);
     var buffer = turf.buffer(geojson, distanceInMiles, 'miles');
+    var areaInSqMeters = turf.area(buffer);
+    var areaInSqKm = areaInSqMeters / 1000000;
+    var areaInSqMiles = areaInSqKm / 2.58999;
+    buffer.area = areaInSqMiles;
+
     fs.writeFileSync(path.resolve('buffers', fileName), JSON.stringify(buffer));
 }