Statistical surfaces: Statistical surfaces are the three dimensional representation of qualitative data such as used in choropleth and isoline maps (figure 8.3i).
statistical surface
Ordinal, interval, or ratio data represented as a surface in which the height of each area is proportional to a numerical value.
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Isometric A mapping technique for portraying a statistical surface where the unit values are shown as projected heights instead of colours in the choropleth method. Item A field or column of information within an RDBMS
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An advantage of the partial spline formulation is that the coefficient of the linear sub-model (the lapse rate) is determined automatically from the data, thus it does not have to be specified beforehand. This statistical surface can then be ...
 See also: Surface, Relation, Elevation, Area, Spatial Data
  
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