Pixel coordinates of a point on the map

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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.

回答(1 个)

Image Analyst
Image Analyst 2012-10-7
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.
  5 个评论
Taha
Taha 2012-10-8
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
Image Analyst 2012-10-8
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.

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