add reference point with known x y coordinates on imagesc

Hi all,

I need to help about adding point on imagesc plot. I need to add a point with known x and y values (coordinates). But I know the x and y values so I do not want to use ginput or datacursormode. Could we make manual position for datacursormode? I just want to show that point on figure as a 'dot' or '+'. Any help would be great. Thanks

Fikret

Answer 1

[Cris LaPierre]

If you have the computer vision toolbox, use insertText.

If not, use the text function.

text(x,y,'+')

Just keep in mind that in an image, 0 for the Y axis is the top left corner instead of the bottom left.

[Fikret Dogru]

Yeah I have this toolbox. But I have x y coordinates as WGS 84 geographic not pixel values. First I need to find my x y coordinates on which pixel. But the x y coordinates not in the x and y workspace variable. For example my x is 29.2 and y 40.3 but the x and y values change 0.001 so how can I do that? Thanks

[Cris LaPierre]

Not familiar with that, but I wonder in the enu2ecef function in the mapping toolbox is helpful. I got there from this answer. If not, I'm afraid without more info I can't be of much help as I'm not familiar with this type of data.

[Cris LaPierre]

Looks like geodetic2enu might be helpful as well? For the spheroid, you could use

spheroid = wgs84Ellipsoid('km');

to specify the wgs84 geopgraphic units.