Symbolspec Lines with geoshow
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Hey,
I'm plotting latitude and longitude data to receive the flight routes. Now I want to color the routes/lines by airline(callsign), so I can see which airline is flying where. Therefore I'm using SymbolSpec. Besides the latitudedegrees and longitudedegree is a column in the table (LnL_Po1) with their callsign, shortened to the airline code.
LineColor = makesymbolspec('Line',{'callsign','UAL', 'Color',[11/256 84/256 229/256]},{'callsign', 'AAL', 'Color', [224/256 6/256 6/256]},{'callsign','DAL','Color',[196/256 0/256 107/256]},{'Default','Color','k'});
geoshow(LnL_Po1.latitudedegrees, LnL_Po1.longitudedegrees,'Line', 'SymbolSpec', LineColor);
Using this code I received following Error Message: The parameter/value inputs must be pairs. I tried to fix it by myself, but couldn't find a solution. Any Suggestions what could be wrong? Thanks in advance!
2 Comments
Jyotish Robin
on 27 Feb 2018
In the geoshow command, I don't see a name corresponding to the value 'Line'. You may be probably missing the name 'DisplayType' which needs to be used along with the value 'Line'.
Answers (1)
Jyotish Robin
on 1 Mar 2018
Hi Philipp,
The geoshow(lat,lon,...) syntax doesn’t work with symbol specs – so geoshow simply passes the SymbolSpec name-value pair to line, which doesn’t know what do so with it.
In order to use a symbol spec, replace lat, lon with S, where S is a geopoint vector, a geoshape vector, or a geostruct (with 'Lat' and 'Lon' coordinate fields).
You can find more info about the stucture of S at https://www.mathworks.com/help/map/ref/geoshow.html
Hope this helps!
Thanks,
Jyotish
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