maps are also distinct for the global knowledge required to construct them. A meaningful map of the world could not be constructed before the European Renaissance because less than half of the earth's coastlines, let alone its interior regions, were known to any culture. New knowledge of the earth's surface has been accumulating ever since and continues to this day. Maps of the world generally focus either on political features or on physical features. Political maps emphasize territorial boundaries and human settlement. Physical maps show geographic features such as mountains, soil type or land use. Geological maps show not only the surface, but characteristics of the underlying rock, fault lines, and subsurface structures. Choropleth maps use color hue and intensity to contrast differences between regions, such as demographic or economic statistics.

Tuesday, August 4, 2015

Gran barrera de coral

image.adapt.1663.medium.jpg
image.adapt.1663.medium.jpg

Peligra-barrera-coral- ...
Peligra-barrera-coral- ...

Científicos piden más esfuerzos para salvar la Gran Barrera de ...
Científicos piden más esfuerzos para salvar la Gran Barrera de ...

Gran barrera de coral - Wikipedia, la enciclopedia libre
Gran barrera de coral - Wikipedia, la enciclopedia libre

Soon every summer will be too hot for corals.. | Tech-Flash
Soon every summer will be too hot for corals.. | Tech-Flash

barrera-coral.jpg
barrera-coral.jpg

Gran barrera de coral | Metro Map | Bus Routes | Metrobus Way Map ...
Gran barrera de coral | Metro Map | Bus Routes | Metrobus Way Map ...

LA GRAN BARRERA DE CORAL- Un milagro de la naturaleza-HD-1/3 - YouTube
LA GRAN BARRERA DE CORAL- Un milagro de la naturaleza-HD-1/3 - YouTube