image processing - Digitize a file showing spatial area using Matlab -

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i have following scanned image of area want digitize in terms of coordinates , depths, depths shown in terms of contour lines. depths shown in above image number on contour line. divide image in terms of grids/pixels , 2 data - representing it's (x, y) coordinates , depth - every grid/pixel.

is there matlab function or file exchange in matlab can used perform task doing manually? perform task faster if done manually. thanks!

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