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<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="font-family:"Arial",sans-serif">The definitions are correct. For the union you want a rectangle (or polygon) that's larger than the input, indeed. But you want the smallest of those rectangles,
because there's an infinity of them. The larger ones would cover an arbitrary area of the plane (or the globe, if you want).<o:p></o:p></span></i></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></i></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><i><span style="font-family:"Arial",sans-serif">Same for the intersection. You want the largest polygon equal to or contained in the inputs. Otherwise a smaller answer could just as well be a single point (or
empty), even in nondegenerate cases.<o:p></o:p></span></i></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Please verify I’m parsing these words the way you intend. To me it sounds like you’re saying the labels for these figures should be reversed? (for gdal)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img width="317" height="165" style="width:3.3in;height:1.7166in" id="Picture_x0020_1" src="cid:image003.png@01D8E3BA.985DDCA0"></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Matt<o:p></o:p></span></p>
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