Radius Around Point

You can use this tool to find the radius around a point on the map. First type in the radius required in kilometers or miles and then click on the map at the center of where you wish the circle to appear. You can then create as many radii as you wish.

Radius Around Point Map

Options

Radius Distance km OR miles OR feet OR meters
Input Point - do one of...
(1) Click on the map  
(2) Place radius by location name :

 Draw Radius 

(3) Input Coordinates : Latitude and Longitude (decimal)

 Draw Radius 

(4) Draw at your location

 Current Location 

ExpandColours and Line Thickness

Line Thickness Line Colour Fill Colour
Thin Red Red
Medium Blue Blue
Heavy Green Green
    White White
    Yellow Yellow
    Black Clear

ExpandMap Options

 Zoom to Fit Map 

 Clear Last 

 Clear Map 

[Map Height : Small - Medium - Large - Full Screen]
Show center marker? Show resize grip?
Add label marker: Type text below then click on the marker for which the label should be attached:

Input

CSV Upload [latitude,longitude,radius(km),label(1 text character / optional)] per line

 Upload 

Click Here to Show/Hide CSV Upload Panel

Output

Circumference of last circle km miles
Area of last circle km² acres
Latitude / Longitude of center of last circle
 
URL to last radius
URL loads full screen?
URL loads unclickable map?
 
Google Maps Static API Image Output
Step 1 : Get the map above to look as you wish (pan/zoom/radii)
Step 2 :

 Generate Your Static Map Code 

 
Google Earth KML Output
Once you have a radius on the map :

 Generate KML 

 

Instructions

  1. Type in a radius required in the text box above.
  2. [Zoom and Pan to find the required area on the map then click on the map to draw a circle] OR [Type a location into the text box and click Draw Radius] OR [Input the latitude and longitude of the location in decimal format].
  3. Click as many times as necessary to draw multiple circles.
  4. You can use the [Clear Map] button to erase all markers and radii and start again.

Use the "URL to last radius" text box to find a URL that will show the most recent radius on this page when opened in a web browser. This URL can be sent to anyone if you wish to forward it on.

Google Earth KML Output

You can now export all the drawn radii on the map to Google Earth for improved display and printing. You must have Google Earth installed (or another application capable of importing KML files). You need to have a radius displayed on the map before the output will work. Please report any bugs.

The procedure to Export to KML is as follows:

  1. Draw one or more radii on the map as you see fit
  2. Once ready, click the [Generate KML] button. You will probably need to scroll down the page to find this!
  3. After a short delay, a blue hyperlink will appear below the button that reads [Download KML File Here]
  4. Click the hyperlink to download the KML file to your local machine
  5. You can then open the KML file in application such as Google Earth

Currently, the KML will include:

  1. The same radius size and shape
  2. Transparency of 50%

It will not include:

  1. Shading colour (blue only, but you can change this once it is loaded into Google Earth)
  2. Line colour (you can change this once it is loaded into Google Earth)
  3. Line thickness (you can change this once it is loaded into Google Earth)

These features may be added later depending on feedback.

CSV Upload

The CSV option allows you to upload bulk points to the map. To do this you must format your points using the convention of latitude,longitude,radius per line where latitude and longitude are in decimal format and radius in km. Make sure to strip out any whitespace. You can upload as many lines as you wish, however more lines will take more time and every web browser will have its limits on the maximum number of lines (hence circles drawn) before things slow to a halt.

For Example...

51.538611,-0.016389,10
51.538611,-0.016389,15

..should add two radii around the Olympic stadium in London for 10km and 15km

Future Ideas

  • Ability to input nautical miles
  • URL link includes settings to show/hide the radius centre marker and resize grip
  • URL link to include the data for multiple radius

Version History

  • 2nd March 2017 - KML output now includes fill and line colours for each radius
  • 2nd November 2016 - New CSV Output panel displays parameters of all radius drawn
  • 31st October 2016 - New button to draw radius at current location
  • 19th August 2016 - Bug fix : URL for multiple radius didn’t appear when only drawing radius by place name
  • 21st July 2016 - URL is now available for all radius drawn
  • 25th February 2016 - URL now contains information about the map type so you can load the radius with different map types
  • 4th May 2015 - Update to allow a resize after using method 2 or 3 to recalculate the Radius Distance
  • 7th May 2013 - 2 new options added : URL loads full screen? AND URL loads unclickable map?
  • 13th January 2013 - Label on marker now displays radius. You can now annotate markers.
  • 15th February 2012 - Updates to layout of options
  • 8th January 2012 - Added search for location text box
  • 7th January 2012 - Resolved issue where the specified fill colour was not used if the draw by address or latitude/longitude was used
  • 22nd December 2011 - Added full screen option. Fixed issue when dragging the centre point of a smaller radius
  • 15th September 2011 - Added option to upload CSV text for bulk upload of multiple points
  • 13th June 2011 - Fixed issue with clear fill having the same colour as the previously selected colour
  • 7th June 2011 - Option to hide the resize grip
  • 3rd June 2011 - Radii can now be resized while onscreen
  • 23rd May 2011 - Radii can now be clicked to be drawn inside an existing radius
  • 10th May 2011 - Static map output now uses Google Static Maps API V2. No key required. Will not output an URL > 2048 characters
  • 9th May 2011 - Fixed issue with clear fill having a grey shade
  • 15th April 2011 - Allow the last radius to be deleted (not just all at once)
  • 3rd February 2011 - Export to KML now copes with multiple radii
  • 20th January 2011 - Circumference and area now also output in miles and acres
  • 29th December 2010 - Click on a marker to delete it
  • 29th December 2010 - Allow markers to be dragged
  • 29th December 2010 - Converted to Google Maps API V3
  • 2nd June 2010 - Moved the scale control to the top of map to stop conflict with Google Search bar
  • 27th January 2010 - Added Google Earth KML Output
  • 13th October 2009 - Overlapping radii now supported
  • 29th September 2009 - Added Google Search Bar to map. Added radius display on marker when you hover over the marker
  • 24th September 2009 - Added URL to last radius function
  • 17th September 2009 - Added Google Maps Static API Image Output
  • 3rd January 2009 - Added latitude and longitude input option
  • 29th September 2008 - Added clear fill option
  • 9th September 2008 - Added Place radius by location name option and reworked some other functions
  • 21st January 2008 - Improved circle reliability and added fill colour
  • 15th October 2007 - Added area and circumference output
  • 25th September 2007 - Added different colour's, change thickness, show/hide center marker, change map height and print the page
  • 13th September 2007 - Now works with IE
  • 22nd July 2008 - Added option to use miles as radius input
  • 30th June 2007 - Clear Map button added
  • 29th June 2007 - Page created with basic functionality

Comments For This Page

Google Maps keeps crashing. The error says "See the JavaScript console for technical details." Please fix ASAP.
On 19th July 2017

I just used it to do a rough guess of "200 miles within the Denver Metro area" ... I am assuming that as I entered each county, it centered on a specific part of each county (center?) ... would have been nice to be able to see within the 200 miles of the boarders of each of those.
By Greg on 19th July 2017

This tool was wicked fast for me, and so helpful! For a school project, I'm surveying all Starbucks shops within 3 miles (walking distance) of a spot in downtown Minneapolis. Can't find anything simpler than this! Thank you!
By Mack on 19th July 2017

Im also getting errors now?
By CDS on 18th July 2017

boooooohoooooo.... I am so sad it does not seem to work anymore..... the radius tool keeps on saying something like error Javscipt console (something to do with that anyhoo....)
By mee on 17th July 2017

Awesome tool!!
By Mitch on 13th July 2017

Just what I was looking for! Thanks!!
By Eddy B on 13th July 2017

Google Maps crashes since July 9. Please fix.
On 11th July 2017

I'm getting the "oops...google maps..." error on The map at the top of this webpage as well as on lightningmaps.org, I have tried three different browsers using Windows 10.
By Keith on 10th July 2017

javascript console indicates that i've exceeded my daily request quota for this API??? WTF?
By MJP on 10th July 2017

J Johnson, please give more detail about how it is very difficult to use please.
By Free Map Tools on 10th July 2017

On 7th July 2017, please give more detail about how it is troublesome and not user friendly please.
By Free Map Tools on 10th July 2017

Not a bad application but very difficult to use.
By J Johnson on 9th July 2017

very troublesome. Not user friedly
On 7th July 2017

is this the co housing location map?
By lynda dolan on 4th July 2017

Hi, there is no fine control of the fill transparency. You can either set the colour or choose 'Clear' fill inside the Colours and Line Thickness section.
By Free Map Tools on 4th July 2017

This is great! How do I adjust the fill transparency?
On 3rd July 2017

exactly what i was looking for thanks
On 28th June 2017

How do I know which cities are within the radius?
On 26th June 2017

Acknowledging repair/functionality of Google Maps load process. Regarding the menu-collapse issues, that is also now working for now, although this has often been on-and-off-again. During the interval these last few days, I did try to look at the JavaScript console and found no issues, although I am not confident I would have known what to look for or what to do it I found anything. In any case, for now, all is working well, and thank you for all your efforts!
By Chris on 25th June 2017

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