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Client Side Buffering Extension

This extension can add the ability to allow user-drawn areas to be buffered. It will modify the shape inline, so the original shape is not natively recoverable.


Users can see the buffered shapes in the client!


  • Creates more dependencies. GeoMOOSE is already a fairly sizeable deliverable. JSTS is, itself, sizeable.
  • Some confusion. There are now three different ways to do a buffer.
  • Some browsers may bite the dust trying to calculate the buffers on more complex shapes.


This requires the use of JSTS. The instructions below will install a tested version of JSTS using bower.

To install bower globally:

npm install -g bower


cd extensions/ClientBuffer

# this will install all the required components
bower install

Add JSTS and Client Buffer to geomoose.html

<script type="text/javascript" src="extensions/ClientBuffer/bower_components/jsts/lib/javascript.util.js"></script>
<script type="text/javascript" src="extensions/ClientBuffer/bower_components/jsts/lib/jsts.js"></script>
<script type="text/javascript" src="extensions/ClientBuffer/ClientBuffer.js"></script>