<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1461502637552_26755">Thanks for the previous comment. I realized that my rater layers are having different properties ( some having lesser columns than others). So now I am worried on how to address this in QGIS, may be having a new column with dummy data into it? Do I really need to worry on the implication of such to the next analysis(Ecological Niche models)?</div><div id="yui_3_16_0_ym19_1_1461502637552_26745">Thanks <br></div><div id="yui_3_16_0_ym19_1_1461502637552_26745">Geraud</div></div></body></html>