mapping - contour 



We have all seen maps of countries which are called relief maps; these look as if a photograph of the country has been made in such a way as to show very plainly the mountains and valleys. Such a map, made out of sand by two boys, is shown here. Another sand map here. One might use a topographical map that shows the altitude. 'Contour lines' on the maps represent changes in elevation. When contour lines are close together, the slope is steep.
What maby cannot translate from one to another dimention is to be found in the first photograph ever.
Happy easter, Zoe Tati

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4.4.07 # zoe tati

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