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Geographical Maps - replace an area with a density illustration

Priyan Fernando

Posted 11 years ago

I have used the morphological components function: http://reference.wolfram.com/language/ref/MorphologicalComponents.html#41373480 (you can copy and paste the Africa map code in to Mathematica) Once this is done I have the map with each area separated by a different colour. What I want to do is take a particular area (which corresponds to a particular colour in the map) and then replace it with a density plot (e.g. image of 400 points scattered uniformly in this area, of which 70% are blue and 30% are red). Any idea how this can be done? Thanks!

POSTED BY: Priyan Fernando

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Vitaliy Kaurov

Vitaliy Kaurov, WOLFRAM Research

Posted 11 years ago

Have you seen this example in documentation (below)? You can use scatter plots instead of flags. flags = EntityValue[EntityClass["Country", "Africa"], {"Entity", "Flag"}]; GeoGraphics[{EdgeForm[Black], {GeoStyling[{"Image", #2}], Tooltip[Polygon[#1], CommonName[#1]]} & @@@ flags}, GeoBackground -> "StreetMapNoLabels"]

Have you seen this example in documentation (below)? You can use scatter plots instead of flags.

flags = EntityValue[EntityClass["Country", "Africa"], {"Entity", "Flag"}]; 
GeoGraphics[{EdgeForm[Black], {GeoStyling[{"Image", #2}], 
     Tooltip[Polygon[#1], CommonName[#1]]} & @@@ flags}, 
 GeoBackground -> "StreetMapNoLabels"]

enter image description here