  Two-dimensional (2D) atom localization via the spontaneously generated
coherence (SGC) and detunings associated with the probe and standing-wave
driving fields in a three-level V-type atomic system are investigated. In the
gain process, two equal and tunable peak maxima of position distribution in the
plane via the detunings are observed. However, one decreasing and the other
increasing peak maxima in the absorption process via the SGC are achieved in
the quadrants I and III of the x-y plane. A better resolution and more novelty
for the 2D atom localization in our scheme are obtained.
