<p dir="ltr">Hi there,</p>
<p dir="ltr">I have a massive problem and I am desperately in need of help.</p>
<p dir="ltr">Beforehand:</p>
<p dir="ltr">my operative system is windows 7.<br>
I have qgis 2.8.1 - wien<br>
I installed it with a standalone-installer.</p>
<p dir="ltr">Now my problem is:<br>
i have a vector layer of points that represent gps locations of dolphins in the estuary. </p>
<p dir="ltr">I have a mathematical formula to calculate the area of error associated to the location of each point. This formula generates the area of parallelograms and so for each point I have the area of the associated parallelogram (each point is the center of its associated parallelogram).</p>
<p dir="ltr">Some of these parallelograms will overlap each other and I will have a bigger error associated to the location of points in those areas. </p>
<p dir="ltr">So far I have the area values of the parallelograms and the coordinates (x,y) of their centers.</p>
<p dir="ltr">I need to create a gradient (imagine a density gradient) but for the overlapping parallelograms. This is my final goal!</p>
<p dir="ltr">But I don't know how to do this! I don't even know how to draw the parallelograms. </p>
<p dir="ltr">Thank you so much!</p>
<p dir="ltr">-- <br>
Margarida Costa</p>