Area of Irregular Polygon

[Roger Guay]

Thanks, Geoff . . . I understand.  Fortunately for me in my current quest, it’s not a problem.



> On Nov 7, 2015, at 7:47 PM, Geoff Canyon <gcanyon at gmail.com> wrote:
> 
> Important to note that this method of calculating the area of a polygon
> will fail if the polygon crosses itself. As long as the polygon is simple,
> it works.
> 
> On Sat, Nov 7, 2015 at 8:30 PM, Roger Guay <irog at mac.com> wrote:
> 
>> This is great . . . Thanks, guys!!!
>> 
>> 
>>> On Nov 7, 2015, at 4:56 PM, Geoff Canyon <gcanyon at gmail.com> wrote:
>>> 
>>> put line 1 of pPts into oldL
>>>     repeat for each line L in line 2 to -1 of pPts
>>>        add (item 1 of L - item 1 of oldL) * ( item 2 of oldL + item 2 of
>>> L) / 2 to tArea
>>>        put L into oldL
>>>     end repeat
>> 
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