I've got 12 delimited text csv files with regular pseudo-gridded points for temperature and salinity which look like this when zoomed in (inc distances) and this when zoomed out. I'm trying to convert them to a smooth surface layer - assumedly interpolated - but using the interpolation plugin on a vector layer saved from one of the csv's produced this kind of output, irrespective of how many columns I use.
Please can someone suggest the best method to turn my grids of dots into a nice smooth surface that I can use colour interpolation on?
Many thanks in advance. I feel that this should be really simple but I'm bashing my head against it and keep failing! Cheers.