Plotting latitude, longitude,and signal strength

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Simran Sandhu 2019-1-8

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回答： Jacob Halbrooks 2020-4-3

I have a list of latitude and longitude along with signal strength obtained from mobile towers in a certain region. I have all the data in CSV format. In total, I have 4 CSV files.

How can I plot that data in MATLAB?

As a range of signal strength will be shown by different colour and other range will be shown in different colour.

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Bob Thompson 2019-1-8

For a color variance like that I would suggest looking into contour().

Simran Sandhu 2019-1-8

编辑：Simran Sandhu 2019-1-8

Okay thank you, i will look into that function,,basically I want to show difference in signal strength with respect to different lat and long

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KSSV 2019-1-9

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Read about pcolor, surf, scatter, conourf. All these can be used to plot what you want.

The below link shows the possible plots which can be obtained from MATLAB. YOu can have a look on the link, it has a plot and respective code from which you can learn.

https://in.mathworks.com/products/matlab/plot-gallery.html

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KSSV 2019-1-9

编辑：KSSV 2019-1-9

在 MATLAB Online 中打开

To use contour you should be having a matrix data. With your data..this is what I can get:

[num,txt,raw] = xlsread('powerlevel.csv') ;
lat = num(:,1) ;
lon = num(:,2) ;
val = num(:,3) ;
scatter(lon,lat,10,val,'filled') ; colorbar
m = 100 ;
x = linspace(min(lon),max(lon),m) ;
y = linspace(min(lat),max(lat),m) ;
[X,Y] = meshgrid(x,y) ;
Z = griddata(lon,lat,val,X,Y) ;
contour(X,Y,Z) ;

Simran Sandhu 2019-1-9

xyz.PNG

Okay thank you so much,, will try to modify it as much as i can.

Thank you.

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Jacob Halbrooks 2020-4-3

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A new feature is available in R2020a to support importing and visualizing propagation data like this. The feature is available in Communications Toolbox and Antenna Toolbox and supports table-based files or data which contains latitude, longitude, and corresponding values like signal strength. You can learn about the feature here, and below is an example contour map that you can create with it: