Calculating area of a polygon drawn on google map

google-maps map google-maps-api-3 gps polygon
Kunal picture Kunal · Jan 27, 2012 · Viewed 51.7k times · Source

I am looking for an accurate algorithm or a service to calculate surface area on earth where points are calculated on the basis of GPS Coordinates.

I am using Google Map Api version 3 and are drawing polygons based on recorded coordinates but I don't think the standard ways of calculating area of the polygon will take into account of slopes(hills). Do I need to work on contours for such thing?

Are there any third party services may be ArcGis or some other that takes into account of slopes as well.

Answer

Brad picture Brad · Jan 28, 2012

Yes, this is definitely possible. There is a quick tutorial with example code here:

https://web.archive.org/web/20130301120148/http://geojason.info/demos/line-length-polygon-area-google-maps-v3

The relevant part is this:

google.maps.geometry.spherical.computeArea(yourPolygon.getPath());

Official documentation:

http://code.google.com/apis/maps/documentation/javascript/reference.html#spherical

Related questions

How to center a google map around a country if you just have the country name

I have a page about hiking in various countries. I am trying to make a page like that for each country, but not sure how to automatically center the google map around a country and also have it adjust the …

Read More
Getting 0.0 for latitude and longitude while showing current location in map

I am using the following code to get my current location. But the problem I am facing is, it always returns 0.0 for latitude and longitude. I have turned on the GPS settings in the phone and set all the permissions. …

Read More
Error Inflating class com.google.android.maps.MapView

i am just following a simple map tutorial http://developer.android.com/resources/tutorials/views/hello-mapview.html but getting this error . I am new to android i tried to follow all the solution provided over the internet but no success …

Read More