Free Map Tools

Instructions

To use the area calculator tool:

• 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 be output in square meters 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.

You can also reposition the markers after they have been placed on the map by dragging and dropping them.

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 km² [1] , 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)
• 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
• Add a quick find option to zoom in to the region without much panning and zooming
• Add square feet output

Version History

• 8th January 2012 - Upgraded to Google Maps API V3 and some new features
• 20th July 2010 - Added crosshairs and option to switch on/off crosshairs
• 17th June 2010 - Added upload KML option (beta)
• 2nd June 2010 - Moved the scale control to the top of map to stop conflict with Google Search bar
• 2nd February 2010 - Added perimeter output in meters and kilometers
• 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

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By bueno on 04/02/2012

prima riuscivo a colorare le mie mappe, comunque e' una cosa fantastica per me molto utile riesco a misurare i campi in qualsiasi parte del mondo sono un agricoltore di PARMA ITALY
By GIORGIO ROCCABIANCA on 26/01/2012

Area Output 166564.150 m² 0.167 km² 41.159 Acres Perimeter Output 3402.146 m 3.402 km
By Niteen Phirke on 25/01/2012

Area Output 62161.504 m² 0.062 km² 15.360 Acres Perimeter Output 1269.896 m 1.270 km
By 215 Shantabai Phirke on 23/01/2012

First of all, I really appreciate the site. It really helps me out. It would be nice to have a running total of the areas. I am calculating total landscaped area for water budgeting. The ability to be able to go back and click a polygon and see what the area is would help to. Can we save these files? My employer won't buy me Google earth and I know that it is possible to save polygons on that. Thanks!
By Conservation Guy on 20/01/2012

Tried to upload with different file, and it worked. First file must have been bad format or something.
By Kdb on 15/01/2012

Best application I have found for this. Upload seems to just clock, not sure what it is supposed to do.
By Kdb on 15/01/2012

your western portion of your "N" directional compass is hidden under another directional compass and difficult to access...please correct
On 11/01/2012

This is an extremely useful sight. Thankyou VERY much. Paddy. (Australia)
By Paddy on 11/01/2012

The address search doesn't see to work and the maps don't fill the entire space on Large map height (didn't try others). I think both problems started with update. Great tool, please keep it up! Thank you
By Kentucky USA Guy on 10/01/2012

From "mark it"...I meant the crosshairs...again thx for adding it...please keep working on "jittering"...nonetheless great job
On 10/01/2012

The crosshairs have been added. There is a bit of jittering about when the map is panned/zoomed but we have not yet found a way of stopping this.
By Free Map Tools on 09/01/2012

Like the improvements... miss the crosshairs though
On 09/01/2012

Hi, can you explain what you mean by "mark it" please? If possible we would rather keep the new format, but if previous functionality is missing we will endeavour to get the functionality back. Can you explain what has went missing please?
By Free Map Tools on 09/01/2012

why did you change your format. now it's very difficult to locate the area...you no longer "mark It". please return to old format!!!!!
On 09/01/2012

Mind blowing bakwas hai yeh tool
On 06/01/2012

Looking forward for the update's
On 05/01/2012

Brilliant. Would be better with lat/long info
On 01/01/2012

Fantastic tool, must be appreciated..
By Muhammad Asif Warraich on 28/12/2011

Mind blowing!!
By Shrikant on 16/12/2011

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