The shovel 100 includes a lower traveling body 1, an upper revolving body 3 mounted rotatably on the lower traveling body 1, and an excavating attachment AT mounted on the upper revolving body 3, It has a boom angle sensor (S1), a rock angle sensor (S2), a bucket angle sensor (S3), etc. as an attitude detection apparatus which detects the attitude|position of the excavation attachment (AT). The shovel 100 is configured to generate the virtual surface VS by using information about the position of the tooth line of the bucket 6 derived from the output of the posture detecting device.
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