I am having trouble calculating the volume of my TIN.
I have attempted to create a TIN using the interpolation plugin in QGIS. Here are the steps that I followed.
- I added a Zvariable row in the attribute table of the vector layer with the value of 500 (I am assuming this corresponds to 500 meters).
I used the interpolation plugin in QGIS to create a TIN layer. I created it following steps advised through the qgis website which recommended however that I use a cell size of 5000 for both both X and Y cells but this came up with an error message for me so I left it as it was set by default (please see the screenshot below for details of exactly what I entered).
After, I defined the coordinate system as WGS84, and the attached layer appeared (please see in the below attachment, the layer titled testTIN which is shown in black shading).
Do you believe that my TIN layer is correct and if so, how do I now go about calculating the volume of the area?
I have also attached for you a screenshot of the attribute table of the layer used in the interpolation plugin to create the TIN.