crop polygon from an image using php -


i have map image , want crop selected areas of map using php.i find ways of cropping in rectangles shape.but want polygon shape of source image,and have no idea start. here img

enter image description here

i want save pieces of map(whiting area borders) seperate image.

after ages of searching.i create polygons want in photoshop.and use them overlays. place overlay images on original image , save new image generated witch croped image wanted .(this procejure done php not photoshop).


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