Plot a line parallel to map axis

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Poulomi Ganguli
Poulomi Ganguli 2023-9-2
评论： Poulomi Ganguli 2023-9-2
Hello:
I wish to plot a straight line parallel to the tropics, i.e., [0,0] to [-180, 180] over the world map defined over map axis ax. I have tried geoplot but its not working. Pls. advice. I also want to set different colors and line thickness and plot another set of lines parallel to tropics but across [-23,23] to [180,180] showing tropical regions.

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Dyuman Joshi
Dyuman Joshi 2023-9-2
编辑：Dyuman Joshi 2023-9-2
Ran in:
Answer according to the information available -
figure
%Create map axes
mx1 = mapaxes;
land = readgeotable("landareas.shp");
%plot world map
geoplot(land)
hold on
%Add plots for tropical lines
geoplot([23 23],[-180 180],'r-','LineWidth',1)
geoplot([-23 -23],[-180 180],'g--','LineWidth',1.5)
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Dyuman Joshi
Dyuman Joshi 2023-9-2
编辑：Dyuman Joshi 2023-9-2
Ran in:
@Poulomi Ganguli How about this?
ax=axesm('mercator');
f=worldmap([-60 80],[-180 180]);
load coastlines
geoshow(coastlat, coastlon)
%Define coordinates for tropical lines
yvec = -180:180;
xvec = ones(size(yvec));
geoshow(23*xvec,yvec,'DisplayType','Line','LineWidth',0.75,'Color',[1 0 0])
geoshow(-23*xvec,yvec,'DisplayType','Line','LineWidth',1.5,'Color',[0 1 0],'LineStyle','--')

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