Adding a Legend to Scatter Shapes on a Map

Question

Claire Hollow 2020-7-8

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https://ww2.mathworks.cn/matlabcentral/answers/561689-adding-a-legend-to-scatter-shapes-on-a-map

评论： Claire Hollow 2020-7-8

Hello! I have a map of Nebraska I got by doing this

figure(1) 
usamap('Nebraska')
nebraskahi = shaperead('usastatehi', 'UseGeoCoords', true,...
            'Selector',{@(name) strcmpi(name,'Nebraska'), 'Name'});
geoshow(nebraskahi, 'FaceColor', [0.3 1.0, 0.675])
hold on

and then I use scatterm to plot different points on the map by longitude and latitude.

I have been using different shapes (circles, squares and diamonds) in scatterm for different kinds of points. I am trying to make a legend only to lable what the circles, squares and diamonds mean. Whenever I try to just do legend('Circle Meaning','Square Meaning','Diamond Meaning') it doesn't give me the scatter shapes and instead gives me lines (I'm assuming from the map). Please let me know how to do this, thank you advance for the help!

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Answer 1

Adam Danz 2020-7-8

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https://ww2.mathworks.cn/matlabcentral/answers/561689-adding-a-legend-to-scatter-shapes-on-a-map#answer_462977

在 MATLAB Online 中打开

Step 1: Define the legend strings using DisplayName

Example

h1 = scatter(___, 'd', 'DisplayName', 'Diamond meaning');
h2 = scatter(___, 'o', 'DisplayName', 'Circle meaning');
h3 = scatter(___, 's', 'DisplayName', 'Square meaning');