GPS Colormapping regarding for drone

I am currently working on a project which requires coordinate mapping of a drone with respect to it's acceleration at x axis.

Here is the code ı am using to plot lat, lon, acc_x;

close all; clear all; clc;

fileID = fopen ('Test_31_03_2016_2.TXT');

formatSpec = '%s';

N=50;

cac = textscan(fileID,'%fN%fE%f%f%f%f%f%s%f%f', 'Delimiter',',' );

lat=cac{1};

lon=cac{2};

acc_x=cac{10};

acc_x_min = min(acc_x);

acc_x_max = max(acc_x);

meanValue = mean(acc_x);

a=colormap; bigthan = acc_x(:,1) > 340; %Pre-defined value, can be changed.

plot(lon(bigthan),lat(bigthan),'.','MarkerSize',30,'Color',[1 .7 0])

hold on

plot(lon(~bigthan),lat(~bigthan),'.-','MarkerSize',30)

plot_google_map

And here is my output image:

/matlabcentral/answers/uploaded_files/48844/Oldu_beaaah_%C3%B6%C3%B6eeeaaaahhhheee%C3%B6%C3%B6%C3%B6.jpg

Right now i am plotting with respect to 2 acc values, the ones which are greater than 340 (orange) and below 340 (reddish color)

My question is;

I want to plot higher acc values with darker colors and lower acc values with lighter colors. It is my first time with COLOR MAPPING and it's functions so i am not pro-user.

Any kind of help is appreciated.

Answer 1

[Chad Greene]

Hi Ugue,

Use scatter. To scale the color of dots relative to the acc_x array, all you need is

scatter(lon,lat,60,acc_x,'filled')

where 60 is simply the size of the dots. Add a colorbar like this:

cb = colorbar; 
ylabel(cb,'acceleration')

After you have plotted with scatter you can change the colormap to your liking using any of the built-in colormaps, for example

colormap(hot)

or

colormap(gray)

or you can download nicer colormaps if you want to get real fancy.

[Ugue Halden]

Thank you so much, you are really a life savior.