Area Calculator
This tool can be used to find the enclosed area of a defined polyline on a map.
Measure an Area
Output
Options
Instructions
- Zoom and pan the map to find the area of interest
- Click on the map to place a vertices for the polyline
- Click as many time as necessary to define the polyline
- The area enclosed will them me output in square metres and square kilometers
You can click the [Delete Last Point] button if you make a mistake or click [Clear All] points to remove all points from the map and start again.
Information
The area calculator tool allows you to find out the area that is enclosed inside a closed polyline overlaid on a map.
Benchmarks
A measurement of Lough Neagh in Northern Ireland. Lough Neagh is reported to have a surface area of 388 kmē, so the reading of 380 823 442m² isn't far off.
Future Uses and Ideas
- Allow the user to change the colour of the polylines and area shading (including transparent)
Output area in more units such as acres- Allow the option to have more than one area on the map at the same time
- Option to show/hide markers
- Output the length of the perimeter
Draggable markers to enable easy modifications
Version History
- 25th March 2008 - Draggable markers, ability to click inside polygon and output in acres added
- 26th June 2007 - Basic area calculation added
- 24th June 2007 - Page created
Previous Comments For This Page
Absolutly Amazing Tool ! :)
By Dave on 20/04/2008
Thanks for the comments - I see what you mean about not being able to click inside the area. This does make it more cumbersome to use. We will look in to this and see if it can be fixed.
By Free Map Tools on 05/11/2007
The only tool I found on the internet to do this - great stuff. I couldn't put a point inside the shaded area as I came to complete the polygon - so one needs to think about the final point when starting the polygon - or the tool needs to be changed to allow this. A bit of a shame one cannot overlay an OS map to get a little more precision.
On 05/11/2007
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