Getting coordinates from the webmap at your mouse position

Hello,

I want to create a map where the user can set a pin and i also want to save the coordinates of the pin afterwards. I tried to work with the webmap and also with geoplot, but both ways dont really work well. A solution would be very appreciated.

Thank you for your help.

Greetings

Daniel

Answer 1

[Yash]

You can use the mapping toolbox in MATLAB. I think the geoshow and save function may help (for display and saving). Refer to this code for some more understanding.

%setting up a figure with a Mercator projection for the map

figure

ax = axesm('MapProjection', 'mercator');

set(ax, 'Units', 'normalized', 'Position', [0 0 1 1]);

%set a pin given by user

[lat, lon] = inputm(1);

%display the pin

geoshow(lat, lon, 'Marker', 'o', 'Color', 'red', 'MarkerSize', 10);

%save the pin

save('pin_coordinates.mat', 'lat', 'lon');

%end of code

Hope this helps.

[Daniel]

Thank you for your fast response!

I want to create a world map that can also be zoomed in and out. So how can i combine this idea with your code?

[Yash]

For this, you can integrate the Leaflet library for MATLAB with the leaflet function and Leaflet's JavaScript capabilities. To start, download and install the Leaflet library for MATLAB from the MATLAB File Exchange and add the library to your MATLAB path. Then download the Leaflet JavaScript library from the official Leaflet website: Leaflet.js and place the Leaflet JavaScript files (leaflet.js and leaflet.css) in the same directory as your MATLAB script. Then run the following MATLAB code.

%Creating map with zoom functionality

map = leaflet('MapCenter', [0, 0], 'ZoomLevel', 2);

%Set pin interactively

marker = addMarker(map, 'Draggable', true);

%Save the coordinates

lat = marker.Lat;

lon = marker.Lon;

save('pin_coordinates.mat', 'lat', 'lon');

%Display the map

map.Visible = true;

Make sure that the Leaflet JavaScript files are properly included in your MATLAB script or project folder for the integration to work correctly.

[Andrés]

Where can i obtain the Leaflet library for Matlab?? I can't find it anywhere... And it's not available in the Matlab file exchange...