1. A system for processing a stored original data set for subsequent display on a user interface of a computer, the original data set having multiple dimensions including a temporal dimension and a number of original data points greater than the number of pixels available on the user interface for displaying a display of pixels for representing the data values of each of the original data points, the system comprising: a data reduction module configured for reducing the original data set to produce a plurality of reduced data sets, each having a number of reduced data points less than the number of original data points and at a respective different aggregated resolution of the original data set based on a selected aggregation dimension, and configured for selecting a reduced data set from the plurality of reduced data sets to match an appropriate aggregated resolution associated with a received query specifying a temporal range; a data resizing module for dynamically resizing the selected reduced data set to produce a resized data set suitable for use in generating the display of pixels appropriate to a pixel display constraint of the user interface defining the number of available pixels in the display of pixels, the module configured for combining the individual data values of selected adjacent ones of the reduced data points in the reduced data set and assigning a combined value based on the combining to a corresponding resized data point in the resized data set, the resized data set having a number of resized data points less than the number of reduced data points; and a pixel module configured for using a predefined colour scale for assigning a unique colour of a plurality of colours to the combined value of the resized data point included in the display of pixels.