Creating M_map for Sea Velocity in a specific geographical area

Hello,

I am very new to Matlab and am trying to create a map such as teh Shaded Relif example in https://www.eoas.ubc.ca/~rich/map.html#15._bathym. However, I am very unsure how to execute this, pcolor has not been workign teh best and I wanted to use my data to create a m_map using the data linked. If anyone could helpw ith this it would be greatly appriciated, thank you.

Answer 1

[Kausthub]

Hi Madison,

I understand that you want to create a map like Shaded Relief example and you are not satisfied with pcolor.

Here is article which would be helpful for you to plot maps : Create Maps Using Latitude and Longitude Data - MATLAB & Simulink - MathWorks India

A sample code snippet :

latSeattle = 47.62;
lonSeattle = -122.33;
latAnchorage = 61.20;
lonAnchorage = -149.9;

geoplot([latSeattle latAnchorage],[lonSeattle lonAnchorage],'-*')
geolimits([45 62],[-149 -123])
geobasemap streets

Here are references for other plotting functions that you might useful:

• imagesc() - https://in.mathworks.com/help/matlab/ref/imagesc.html

A simple code snippet specific to your example:

% file = 'LateQuaternary_Environment.nc';
file = 'SeaVelocity(E).nc';
info = ncinfo(file);
variableNames = {info.Variables.Name};
disp(variableNames);

longitude   = ncread(file, 'longitude');
latitude    = ncread(file, 'latitude');
years       = ncread(file, 'time');
depth      = ncread(file, 'depth');
uo = ncread(file, 'uo');

imagesc(longitude, latitude, uo(:,:,1)')
colorbar

• pcolorm() - https://in.mathworks.com/help/map/ref/pcolorm.html

Hope it helps!