I have a 3 column matrix containing respectively the X, Y and Z coordinates of a riverbed topography. The coordinates are in the CH1903/LV03 geographic coordinate system. I wish to convert this data set into a raster of a 0.5×0.5m cell. The location of the points defining the rivebed is irregular, so I will need to go from this to a square grid in order to be able to map the Z values within the referencing matrix. Can anyone help me on this? Thanks!