Actually I have some vector consisting contour line and we have cut certain portion using another sample polygonal area vector.I do it and make a new vector file.Finally, I have to calculate the area bounded by any two or three or more selected contour line in the resultant new vector. In this regards, if I buid a polygon using the selected contour line then problem will be solved. How I can do it.<br>
<br>Regards,<br> <br>Swapan