In order to identify the suspected water regions of apparent resistivity contour maps

develop a system of filling contour maps based on triangulated irregular network（ TIN） and identification of each water regions based on open source computer Vision（ Open CV） outlines extraction

improve contour coloring process

and according to the extracted water area contour topology tree

calculate area of each region

give specific location of area in image. By comparing results of automatic identification with manual identification results

verify practicality of the system

it indicates the system can quickly and accurately identify the water body regions of apparent resistivity contour maps.