: Coordinates of dots on screen Ok so I have a picture of a map with little dots for each city on the map, and I want to find the coordinates of each dot. The only way I've been able to

@Kimberly620

Do this:


Select the black dots with Select → Color Range.... Pick any point on a dot and use a large fuzziness of say 103. Dont worry that the text gets selected we will deal with that next.
Shrink the selection by 3 pixels, choose Select → Modify → Contract..., contract by 3 points (in this image).
With the select tool active right click on canvas and chose Make Work Path, use a setting of 0.5
Run following script, choose a file name to put data into:

#target photoshop

main();

function main() {
var layers = app.activeDocument.pathItems[0];
var file = File.saveDialog('save marker info', 'markerinfo:*.txt');
file.open('w');
handleSubpaths(layers, file);
file.close();
}


function handleSubpaths(path, file){
var numLayers = path.subPathItems.length;
file.write("name, position x, position yn" );
for (var j = 0; j < numLayers; j++) {
var subpath = path.subPathItems[j];
var pos = average(subpath.pathPoints);
file.write(
"marker_"+ (j+1) +", " +
pos[0] + ", "+
pos[1] + "n"
);
}
}


function average(points){
ret = [0,0]
for (var i = 0; i < points.length; i++){
var p = points[i].anchor;
ret[0] += p[0]/points.length;
ret[1] += p[1]/points.length;
}
return ret;
}

Read the data from the text file, or use a spreadsheet. Excerpt form result:

name, position x, position y
marker_1, 388.75, 137.5
marker_2, 509.5, 180.25
marker_3, 792.25, 179.5
marker_4, 403.75, 183.5
....



Done. Anyway, if you can find a vector version of the image and use illustrator one could automatically scrape the names also.

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