1. A method of enabling improved radio network planning for a predetermined geographical area in a telecommunication network, comprising the steps of: providing a plurality of data sampled at irregularly distributed measurement points, each data sample being represented by at least two geographical coordinates and at least one parameter value representative of a physical quantity associated with a radio network planning procedure; providing a regular grid comprising a plurality of grid bins; for each said measurement point: locating a subset of said grid bins within a predetermined distance from said measurement point; and determining a respective contribution from said measurement point at each located grid bin in said subset, based at least on a respective distance between said measurement point and each said grid bin and said at least one parameter value of said measurement point, wherein at least a subset of said grid bins each receive contributions from at least three associated measurement points referred to as contributing measurement points, and wherein each such grid bin is referred to as an active or triggered grid bin; and for each active or triggered grid bin: determining a value of said parameter based on the determined respective contributions from the associated contributing measurement points.