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Statistic data from a certain year can be mapped and compared with a different set of statistical data from another year which originates from the same geographic extent.

Statistical data can be used to clean up data, smooth out rough edges and make the data more meaningful.

It's an process which can be used to extract averages, highest, lowest, means and even deviations values from your acquired data sets and visualize the data on a map.

Compare values over time is sometimes necessary to calculate the past/current/following years timber/sugar yield, increase of customers, increase of population, encroachment of cities or towns on river banks or indigenous forests, the list can be endless.

The following examples are base on cell x cell analysis to find trends or detect changes between various years data sets.