1. A method for classifying seismic attributes comprising: generating a seismic signal by at least one seismic source located below the surface of the earth or below water surface; receiving the seismic signal by a plurality of horizontally spaced apart seismic receivers located below the surface of the earth or below the water surface; generating a first data volume and a second data volume by processing data received by the plurality of seismic receivers; generating data points by cross plotting seismic attributes from the first data volume and the second data volume to identify one or more background trends and one or more anomalous areas spaced apart from the one or more background trends, wherein the one or more anomalous areas correlate to one or more known or prospective reservoir zones; encompassing at least one of the generated data points within a polygon; generating a reference line; determining an interpolation direction relative to the reference line; assigning an attribute value to the at least one generated data point encompassed within the polygon wherein the assigned attribute value is determined by interpolation based on the combination of its position to the reference line along the interpolation direction and the shape of the polygon.