diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a658cc..b613dee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+* `zoom` plugin's `initialScale` can be set to `0`
+
 v0.3.0
 ------
 
diff --git a/dist/planetaryjs-noplugins.js b/dist/planetaryjs-noplugins.js
index bdb5ad6..f94b89a 100644
--- a/dist/planetaryjs-noplugins.js
+++ b/dist/planetaryjs-noplugins.js
@@ -2,7 +2,7 @@
  *  Copyright (c) 2013 Brandon Tilley
  *
  *  Released under the MIT license
- *  Date: 2013-12-24T16:27:25.392Z
+ *  Date: 2013-12-24T16:28:54.858Z
  */
 (function (root, factory) {
   if (typeof define === 'function' && define.amd) {
diff --git a/dist/planetaryjs.js b/dist/planetaryjs.js
index d76f052..c8737d4 100644
--- a/dist/planetaryjs.js
+++ b/dist/planetaryjs.js
@@ -2,7 +2,7 @@
  *  Copyright (c) 2013 Brandon Tilley
  *
  *  Released under the MIT license
- *  Date: 2013-12-24T16:27:25.159Z
+ *  Date: 2013-12-24T16:28:54.653Z
  */
 (function (root, factory) {
   if (typeof define === 'function' && define.amd) {
@@ -330,7 +330,7 @@
         var zoom = d3.behavior.zoom()
           .scaleExtent(scaleExtent);
 
-        if (startScale) {
+        if (startScale !== null && startScale !== undefined) {
           zoom.scale(startScale);
         } else {
           zoom.scale(planet.projection.scale());
diff --git a/dist/planetaryjs.min.js b/dist/planetaryjs.min.js
index aa73ac8..c9461e5 100644
--- a/dist/planetaryjs.min.js
+++ b/dist/planetaryjs.min.js
@@ -1,2 +1,2 @@
 /*! Planetary.js 0.3.0 | (c) 2013 Brandon Tilley | Released under MIT License */
-!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var e=null;o&&(e=o.planetaryjs);var i=[],r=function(t,o,e){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<e.onDraw.length;n++)e.onDraw[n]()})},l=function(n,t){for(var o=0;o<i.length;o++)t.unshift(i[o]);for(0===t.length&&(c.plugins.earth&&n.loadPlugin(c.plugins.earth()),c.plugins.pings&&n.loadPlugin(c.plugins.pings())),o=0;o<t.length;o++)t[o](n)},a=function(n,t,o){if(o.onInit.length){var e=0,i=function(n){var t=o.onInit[e];t.length?t(function(){e++,n()}):(t(),e++,setTimeout(n,0))},l=function(){e>=o.onInit.length?r(n,t,o):i(l)};i(l)}else r(n,t,o)},u=function(n,t,o,e){l(n,o),n.canvas=t,n.context=t.getContext("2d"),a(n,t,e)},c={plugins:{},noConflict:function(){return o.planetaryjs=e,c},loadPlugin:function(n){i.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},e={plugins:{},draw:function(n){u(e,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return e.projection=n.geo.orthographic().clipAngle(90).precision(0),e.path=n.geo.path().projection(e.projection),e}};return c.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(e){if(t.world)o.plugins.topojson.world=t.world,setTimeout(e,0);else{var i=t.file||"world-110m.json";n.json(i,function(n,t){if(n)throw new Error("Could not load JSON "+i);o.plugins.topojson.world=t,e()})}})}},c.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},c.plugins.land=function(n){return function(o){var e=null;o.onInit(function(){var n=o.plugins.topojson.world;e=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(e),n.fill!==!1&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},c.plugins.borders=function(n){return function(o){var e=null,i={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,a=n.type||"internal";e=t.mesh(r,l,i[a])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(e),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},c.plugins.earth=function(n){n=n||{};var t=n.topojson||{},o=n.oceans||{},e=n.land||{},i=n.borders||{};return function(n){c.plugins.topojson(t)(n),c.plugins.oceans(o)(n),c.plugins.land(e)(n),c.plugins.borders(i)(n)}},c.plugins.pings=function(t){var o=[];t=t||{};var e=function(n,e,i){i=i||{},i.color=i.color||t.color||"white",i.angle=i.angle||t.angle||5,i.ttl=i.ttl||t.ttl||2e3;var r={time:new Date,options:i};t.latitudeFirst?(r.lat=n,r.lng=e):(r.lng=n,r.lat=e),o.push(r)},i=function(n,t,e){for(var i=[],l=0;l<o.length;l++){var a=o[l],u=e-a.time;u<a.options.ttl&&(i.push(a),r(n,t,e,u,a))}o=i},r=function(t,o,e,i,r){var l=1-i/r.options.ttl,a=n.rgb(r.options.color);a="rgba("+a.r+","+a.g+","+a.b+","+l+")",o.strokeStyle=a;var u=n.geo.circle().origin([r.lng,r.lat]).angle(i/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(u),o.stroke()};return function(n){n.plugins.pings={add:e},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){i(n,o,t)})})}},c.plugins.zoom=function(t){t=t||{};var o=function(){},e=t.onZoomStart||o,i=t.onZoomEnd||o,r=t.onZoom||o,l=t.afterZoom||o,a=t.initialScale,u=t.scaleExtent||[50,2e3];return function(t){t.onInit(function(){var o=n.behavior.zoom().scaleExtent(u);a?o.scale(a):o.scale(t.projection.scale()),o.on("zoomstart",e).on("zoomend",i).on("zoom",function(){r(),t.projection.scale(n.event.scale),l()}),n.select(t.canvas).call(o)})}},c.plugins.drag=function(t){t=t||{};var o=function(){},e=t.onDragStart||o,i=t.onDragEnd||o,r=t.onDrag||o,l=t.afterDrag||o;return function(t){t.onInit(function(){var o=n.behavior.drag().on("dragstart",e).on("dragend",i).on("drag",function(){r();var o=n.event.dx,e=n.event.dy,i=t.projection.rotate(),a=t.projection.scale(),u=n.scale.linear().domain([-1*a,a]).range([-90,90]),c=u(o),s=u(e);i[0]+=c,i[1]-=s,i[1]>90&&(i[1]=90),i[1]<-90&&(i[1]=-90),i[0]>=180&&(i[0]-=360),t.projection.rotate(i),l()});n.select(t.canvas).call(o)})}},c});
\ No newline at end of file
+!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var i=null;o&&(i=o.planetaryjs);var e=[],r=function(t,o,i){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<i.onDraw.length;n++)i.onDraw[n]()})},l=function(n,t){for(var o=0;o<e.length;o++)t.unshift(e[o]);for(0===t.length&&(c.plugins.earth&&n.loadPlugin(c.plugins.earth()),c.plugins.pings&&n.loadPlugin(c.plugins.pings())),o=0;o<t.length;o++)t[o](n)},a=function(n,t,o){if(o.onInit.length){var i=0,e=function(n){var t=o.onInit[i];t.length?t(function(){i++,n()}):(t(),i++,setTimeout(n,0))},l=function(){i>=o.onInit.length?r(n,t,o):e(l)};e(l)}else r(n,t,o)},u=function(n,t,o,i){l(n,o),n.canvas=t,n.context=t.getContext("2d"),a(n,t,i)},c={plugins:{},noConflict:function(){return o.planetaryjs=i,c},loadPlugin:function(n){e.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},i={plugins:{},draw:function(n){u(i,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return i.projection=n.geo.orthographic().clipAngle(90).precision(0),i.path=n.geo.path().projection(i.projection),i}};return c.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(i){if(t.world)o.plugins.topojson.world=t.world,setTimeout(i,0);else{var e=t.file||"world-110m.json";n.json(e,function(n,t){if(n)throw new Error("Could not load JSON "+e);o.plugins.topojson.world=t,i()})}})}},c.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},c.plugins.land=function(n){return function(o){var i=null;o.onInit(function(){var n=o.plugins.topojson.world;i=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),n.fill!==!1&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},c.plugins.borders=function(n){return function(o){var i=null,e={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,a=n.type||"internal";i=t.mesh(r,l,e[a])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},c.plugins.earth=function(n){n=n||{};var t=n.topojson||{},o=n.oceans||{},i=n.land||{},e=n.borders||{};return function(n){c.plugins.topojson(t)(n),c.plugins.oceans(o)(n),c.plugins.land(i)(n),c.plugins.borders(e)(n)}},c.plugins.pings=function(t){var o=[];t=t||{};var i=function(n,i,e){e=e||{},e.color=e.color||t.color||"white",e.angle=e.angle||t.angle||5,e.ttl=e.ttl||t.ttl||2e3;var r={time:new Date,options:e};t.latitudeFirst?(r.lat=n,r.lng=i):(r.lng=n,r.lat=i),o.push(r)},e=function(n,t,i){for(var e=[],l=0;l<o.length;l++){var a=o[l],u=i-a.time;u<a.options.ttl&&(e.push(a),r(n,t,i,u,a))}o=e},r=function(t,o,i,e,r){var l=1-e/r.options.ttl,a=n.rgb(r.options.color);a="rgba("+a.r+","+a.g+","+a.b+","+l+")",o.strokeStyle=a;var u=n.geo.circle().origin([r.lng,r.lat]).angle(e/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(u),o.stroke()};return function(n){n.plugins.pings={add:i},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){e(n,o,t)})})}},c.plugins.zoom=function(t){t=t||{};var o=function(){},i=t.onZoomStart||o,e=t.onZoomEnd||o,r=t.onZoom||o,l=t.afterZoom||o,a=t.initialScale,u=t.scaleExtent||[50,2e3];return function(t){t.onInit(function(){var o=n.behavior.zoom().scaleExtent(u);null!==a&&void 0!==a?o.scale(a):o.scale(t.projection.scale()),o.on("zoomstart",i).on("zoomend",e).on("zoom",function(){r(),t.projection.scale(n.event.scale),l()}),n.select(t.canvas).call(o)})}},c.plugins.drag=function(t){t=t||{};var o=function(){},i=t.onDragStart||o,e=t.onDragEnd||o,r=t.onDrag||o,l=t.afterDrag||o;return function(t){t.onInit(function(){var o=n.behavior.drag().on("dragstart",i).on("dragend",e).on("drag",function(){r();var o=n.event.dx,i=n.event.dy,e=t.projection.rotate(),a=t.projection.scale(),u=n.scale.linear().domain([-1*a,a]).range([-90,90]),c=u(o),s=u(i);e[0]+=c,e[1]-=s,e[1]>90&&(e[1]=90),e[1]<-90&&(e[1]=-90),e[0]>=180&&(e[0]-=360),t.projection.rotate(e),l()});n.select(t.canvas).call(o)})}},c});
\ No newline at end of file
diff --git a/site/public/js/lib/planetaryjs.min.js b/site/public/js/lib/planetaryjs.min.js
index aa73ac8..c9461e5 100644
--- a/site/public/js/lib/planetaryjs.min.js
+++ b/site/public/js/lib/planetaryjs.min.js
@@ -1,2 +1,2 @@
 /*! Planetary.js 0.3.0 | (c) 2013 Brandon Tilley | Released under MIT License */
-!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var e=null;o&&(e=o.planetaryjs);var i=[],r=function(t,o,e){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<e.onDraw.length;n++)e.onDraw[n]()})},l=function(n,t){for(var o=0;o<i.length;o++)t.unshift(i[o]);for(0===t.length&&(c.plugins.earth&&n.loadPlugin(c.plugins.earth()),c.plugins.pings&&n.loadPlugin(c.plugins.pings())),o=0;o<t.length;o++)t[o](n)},a=function(n,t,o){if(o.onInit.length){var e=0,i=function(n){var t=o.onInit[e];t.length?t(function(){e++,n()}):(t(),e++,setTimeout(n,0))},l=function(){e>=o.onInit.length?r(n,t,o):i(l)};i(l)}else r(n,t,o)},u=function(n,t,o,e){l(n,o),n.canvas=t,n.context=t.getContext("2d"),a(n,t,e)},c={plugins:{},noConflict:function(){return o.planetaryjs=e,c},loadPlugin:function(n){i.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},e={plugins:{},draw:function(n){u(e,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return e.projection=n.geo.orthographic().clipAngle(90).precision(0),e.path=n.geo.path().projection(e.projection),e}};return c.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(e){if(t.world)o.plugins.topojson.world=t.world,setTimeout(e,0);else{var i=t.file||"world-110m.json";n.json(i,function(n,t){if(n)throw new Error("Could not load JSON "+i);o.plugins.topojson.world=t,e()})}})}},c.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},c.plugins.land=function(n){return function(o){var e=null;o.onInit(function(){var n=o.plugins.topojson.world;e=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(e),n.fill!==!1&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},c.plugins.borders=function(n){return function(o){var e=null,i={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,a=n.type||"internal";e=t.mesh(r,l,i[a])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(e),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},c.plugins.earth=function(n){n=n||{};var t=n.topojson||{},o=n.oceans||{},e=n.land||{},i=n.borders||{};return function(n){c.plugins.topojson(t)(n),c.plugins.oceans(o)(n),c.plugins.land(e)(n),c.plugins.borders(i)(n)}},c.plugins.pings=function(t){var o=[];t=t||{};var e=function(n,e,i){i=i||{},i.color=i.color||t.color||"white",i.angle=i.angle||t.angle||5,i.ttl=i.ttl||t.ttl||2e3;var r={time:new Date,options:i};t.latitudeFirst?(r.lat=n,r.lng=e):(r.lng=n,r.lat=e),o.push(r)},i=function(n,t,e){for(var i=[],l=0;l<o.length;l++){var a=o[l],u=e-a.time;u<a.options.ttl&&(i.push(a),r(n,t,e,u,a))}o=i},r=function(t,o,e,i,r){var l=1-i/r.options.ttl,a=n.rgb(r.options.color);a="rgba("+a.r+","+a.g+","+a.b+","+l+")",o.strokeStyle=a;var u=n.geo.circle().origin([r.lng,r.lat]).angle(i/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(u),o.stroke()};return function(n){n.plugins.pings={add:e},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){i(n,o,t)})})}},c.plugins.zoom=function(t){t=t||{};var o=function(){},e=t.onZoomStart||o,i=t.onZoomEnd||o,r=t.onZoom||o,l=t.afterZoom||o,a=t.initialScale,u=t.scaleExtent||[50,2e3];return function(t){t.onInit(function(){var o=n.behavior.zoom().scaleExtent(u);a?o.scale(a):o.scale(t.projection.scale()),o.on("zoomstart",e).on("zoomend",i).on("zoom",function(){r(),t.projection.scale(n.event.scale),l()}),n.select(t.canvas).call(o)})}},c.plugins.drag=function(t){t=t||{};var o=function(){},e=t.onDragStart||o,i=t.onDragEnd||o,r=t.onDrag||o,l=t.afterDrag||o;return function(t){t.onInit(function(){var o=n.behavior.drag().on("dragstart",e).on("dragend",i).on("drag",function(){r();var o=n.event.dx,e=n.event.dy,i=t.projection.rotate(),a=t.projection.scale(),u=n.scale.linear().domain([-1*a,a]).range([-90,90]),c=u(o),s=u(e);i[0]+=c,i[1]-=s,i[1]>90&&(i[1]=90),i[1]<-90&&(i[1]=-90),i[0]>=180&&(i[0]-=360),t.projection.rotate(i),l()});n.select(t.canvas).call(o)})}},c});
\ No newline at end of file
+!function(n,t){"function"==typeof define&&define.amd?define(["d3","topojson"],t):"object"==typeof exports?module.exports=t(require("d3"),require("topojson")):n.planetaryjs=t(n.d3,n.topojson,n)}(this,function(n,t,o){"use strict";var i=null;o&&(i=o.planetaryjs);var e=[],r=function(t,o,i){n.timer(function(){t.context.clearRect(0,0,o.width,o.height);for(var n=0;n<i.onDraw.length;n++)i.onDraw[n]()})},l=function(n,t){for(var o=0;o<e.length;o++)t.unshift(e[o]);for(0===t.length&&(c.plugins.earth&&n.loadPlugin(c.plugins.earth()),c.plugins.pings&&n.loadPlugin(c.plugins.pings())),o=0;o<t.length;o++)t[o](n)},a=function(n,t,o){if(o.onInit.length){var i=0,e=function(n){var t=o.onInit[i];t.length?t(function(){i++,n()}):(t(),i++,setTimeout(n,0))},l=function(){i>=o.onInit.length?r(n,t,o):e(l)};e(l)}else r(n,t,o)},u=function(n,t,o,i){l(n,o),n.canvas=t,n.context=t.getContext("2d"),a(n,t,i)},c={plugins:{},noConflict:function(){return o.planetaryjs=i,c},loadPlugin:function(n){e.push(n)},planet:function(){var t=[],o={onInit:[],onDraw:[]},i={plugins:{},draw:function(n){u(i,n,t,o)},onInit:function(n){o.onInit.push(n)},onDraw:function(n){o.onDraw.push(n)},loadPlugin:function(n){t.push(n)},withSavedContext:function(n){if(!this.context)throw new Error("No canvas to fetch context for");this.context.save(),n(this.context),this.context.restore()}};return i.projection=n.geo.orthographic().clipAngle(90).precision(0),i.path=n.geo.path().projection(i.projection),i}};return c.plugins.topojson=function(t){return function(o){o.plugins.topojson={},o.onInit(function(i){if(t.world)o.plugins.topojson.world=t.world,setTimeout(i,0);else{var e=t.file||"world-110m.json";n.json(e,function(n,t){if(n)throw new Error("Could not load JSON "+e);o.plugins.topojson.world=t,i()})}})}},c.plugins.oceans=function(n){return function(t){t.onDraw(function(){t.withSavedContext(function(o){o.beginPath(),t.path.context(o)({type:"Sphere"}),o.fillStyle=n.fill||"black",o.fill()})})}},c.plugins.land=function(n){return function(o){var i=null;o.onInit(function(){var n=o.plugins.topojson.world;i=t.feature(n,n.objects.land)}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),n.fill!==!1&&(t.fillStyle=n.fill||"white",t.fill()),n.stroke&&(n.lineWidth&&(t.lineWidth=n.lineWidth),t.strokeStyle=n.stroke,t.stroke())})})}},c.plugins.borders=function(n){return function(o){var i=null,e={internal:function(n,t){return n.id!==t.id},external:function(n,t){return n.id===t.id},both:function(){return!0}};o.onInit(function(){var r=o.plugins.topojson.world,l=r.objects.countries,a=n.type||"internal";i=t.mesh(r,l,e[a])}),o.onDraw(function(){o.withSavedContext(function(t){t.beginPath(),o.path.context(t)(i),t.strokeStyle=n.stroke||"gray",n.lineWidth&&(t.lineWidth=n.lineWidth),t.stroke()})})}},c.plugins.earth=function(n){n=n||{};var t=n.topojson||{},o=n.oceans||{},i=n.land||{},e=n.borders||{};return function(n){c.plugins.topojson(t)(n),c.plugins.oceans(o)(n),c.plugins.land(i)(n),c.plugins.borders(e)(n)}},c.plugins.pings=function(t){var o=[];t=t||{};var i=function(n,i,e){e=e||{},e.color=e.color||t.color||"white",e.angle=e.angle||t.angle||5,e.ttl=e.ttl||t.ttl||2e3;var r={time:new Date,options:e};t.latitudeFirst?(r.lat=n,r.lng=i):(r.lng=n,r.lat=i),o.push(r)},e=function(n,t,i){for(var e=[],l=0;l<o.length;l++){var a=o[l],u=i-a.time;u<a.options.ttl&&(e.push(a),r(n,t,i,u,a))}o=e},r=function(t,o,i,e,r){var l=1-e/r.options.ttl,a=n.rgb(r.options.color);a="rgba("+a.r+","+a.g+","+a.b+","+l+")",o.strokeStyle=a;var u=n.geo.circle().origin([r.lng,r.lat]).angle(e/r.options.ttl*r.options.angle)();o.beginPath(),t.path.context(o)(u),o.stroke()};return function(n){n.plugins.pings={add:i},n.onDraw(function(){var t=new Date;n.withSavedContext(function(o){e(n,o,t)})})}},c.plugins.zoom=function(t){t=t||{};var o=function(){},i=t.onZoomStart||o,e=t.onZoomEnd||o,r=t.onZoom||o,l=t.afterZoom||o,a=t.initialScale,u=t.scaleExtent||[50,2e3];return function(t){t.onInit(function(){var o=n.behavior.zoom().scaleExtent(u);null!==a&&void 0!==a?o.scale(a):o.scale(t.projection.scale()),o.on("zoomstart",i).on("zoomend",e).on("zoom",function(){r(),t.projection.scale(n.event.scale),l()}),n.select(t.canvas).call(o)})}},c.plugins.drag=function(t){t=t||{};var o=function(){},i=t.onDragStart||o,e=t.onDragEnd||o,r=t.onDrag||o,l=t.afterDrag||o;return function(t){t.onInit(function(){var o=n.behavior.drag().on("dragstart",i).on("dragend",e).on("drag",function(){r();var o=n.event.dx,i=n.event.dy,e=t.projection.rotate(),a=t.projection.scale(),u=n.scale.linear().domain([-1*a,a]).range([-90,90]),c=u(o),s=u(i);e[0]+=c,e[1]-=s,e[1]>90&&(e[1]=90),e[1]<-90&&(e[1]=-90),e[0]>=180&&(e[0]-=360),t.projection.rotate(e),l()});n.select(t.canvas).call(o)})}},c});
\ No newline at end of file
diff --git a/src/plugins.js b/src/plugins.js
index a2bce49..e48de6c 100644
--- a/src/plugins.js
+++ b/src/plugins.js
@@ -186,7 +186,7 @@
         var zoom = d3.behavior.zoom()
           .scaleExtent(scaleExtent);
 
-        if (startScale) {
+        if (startScale !== null && startScale !== undefined) {
           zoom.scale(startScale);
         } else {
           zoom.scale(planet.projection.scale());