Pixel coordinates of a point on the map

I am looking for a function that gives the pixel coordinates of the points in the map that are specified by their (latitude, longitude) coordinates. My map is a piece of the US map.

Answer 1

[Image Analyst]

You need to calibrate it. You need to click at least two points and specify their lat and long so you can fix a coordinate system and get a spatial calibration (pixels per degree). So then when someone specifies (types in) a lat and long, you can find out how many degrees that is from the origin's lat and long, and then, knowing the lat and long of the origin, and the spatial calibration factor, tell the user what pixel that location would be at on the map image.

[Walter Roberson]

The question has to do with maps and the mapping toolbox; see http://www.mathworks.co.uk/matlabcentral/answers/50031-drawing-directed-graphs-on-the-us-map for contextual information.

[Taha]

You are right. I thought asking the question in another way might help, which apparently didn't.

[Image Analyst]

What do you mean when you talk about pixels if it's not an image? A pixel has to be somewhere. Do you mean the pixel on the screen instead of a pixel in an image array in your program?

[Taha]

Well, perhaps I haven't used the correct term. I meant some coordinates that can be used later in the plot() or similar functions. I have an image, but I guess it is in vector format (see Mapping Toolbox).

[Image Analyst]

Sorry - I don't have that toolbox. Since no one else here seems to be able to help you either, you might have to call them. Hopefully you're current on your maintenance contract.