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Now viewing articles posted in July 2018.

  • How is a map projection like an orange peel?

    July 31st, 2018 by Josephine Hatton


    You may remember your eighth-grade science teacher explaining map projections using the orange-peel analogy: imagine the Earth is an orange.  In order to draw a map of the surface of the orange, we have to find a way to flatten the peel onto a flat piece of paper or computer screen.  But the orange is a sphere, so the only way to do that is to stretch or cut the peel in some places.  Unavoidably, that stretching causes distortion.



    There are lots of ways to do this.  The more you cut the peel up into small pieces, the easier it is to flatten them without too much stretching—but you’re left with a mess of little pieces.  If this is a map, it won’t be a very convenient one.  But if you leave the pieces large, or don’t cut the peel at all, then it will have to stretch a lot to flatten onto the page. 


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  • Massachusetts MS4 General Permit Now in Effect!

    July 5th, 2018 by Nick Cristofori


    The 2016 Massachusetts Small MS4 General Permit is now in effect as of July 1, 2018 after a 1 year postponement.  Similarly, the 2017 New Hampshire Small MS4 General Permit is also in effect as of July 1.  Regulated communities and other non-traditional MS4s (Massachusetts, New Hampshire) now have 90 days


    Once completed, permittees will need to work towards preparing additional deliverables between now and June 30, 2019 such as a Stormwater Management Program (SWMP) Plan and Illicit Discharge, Detection, and Elimination (IDDE) Plan. 

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