MATLAB: Density plot on geomap

density plotgeomapMapping Toolbox

I am working with a set of data. Lat, Lon, and Data values. Each in one column in excel (A,B,C). I want to pin each location of my lat lon on the map and use the data value which is 1X1 array to apply a density color scale. The color will vary based on the intensity of the data value. I tried Pcolor, surf,mesgrid I seem to be running the same error with my data not being 2D dimensions.

Please help.

Best Answer

If you want to use your value as the color, I recommend geoscatter.

lon = (-170:10:170);
lat = 50 * cosd(3*lon);
C = rand(1,length(lon));
geoscatter(lat,lon,[],C,'o','MarkerFaceColor','flat')
colorbar

Related Solutions

MATLAB: Long and lat map plot

If you have the Mapping Toolbox and you have a map initialized already,

plotm(30.45,-91.14,'rp')

If you do not have the mapping toolbox, this is probably better:

plot(-91.14,30.45,'rp')

The 'rp' option specifies a red pentagram.

MATLAB: How to plot multiple geoscatter plots together

Hi Jing,

You can use ‘hold on’ after plotting the initial sets of scatter points with ‘geoscatter’ to add next set of points to existing plotted points. Below mentioned code illustrates use of ‘hold on’ :

%Set up latitude and longitude data.
lon = (-170:10:170);
lat1 = 50 * cosd(3*lon);
lat2 = 20 * cosd(3*lon);
%Define data that controls the area of each marker.
A = 101 + 100*(sind(2*lon));
 
%Define data to control the color of each marker.
C = cosd(4*lon);
%Plotting first set of points
geoscatter(lat1,lon,A,C,'^')
%Using hold to retain plotted points
hold on
%Plotting second set of points
geoscatter(lat2,lon,A,C,'o')

Kindly refer this documentation link to know more details on using ‘hold’ command.

Hope this helps!

Best Answer

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MATLAB: Long and lat map plot

MATLAB: How to plot multiple geoscatter plots together

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