  Gravitational wave source localization problem is important in gravitational
wave astronomy. Regarding ground-based detector, almost all of the previous
investigations only considered the difference of arrival time among the
detector network for source localization. Within the matched filtering
framework, the information beside the arrival time difference can possibly also
do some help on source localization. Especially when an eccentric binary is
considered, the character involved in the gravitational waveform may improve
the source localization. We investigate this effect systematically in the
current paper. During the investigation, the enhanced post-circular (EPC)
waveform model is used to describe the eccentric binary coalesce. We find that
the source localization accuracy does increase along with the eccentricity
increases. But such improvement depends on the total mass of the binary. For
total mass 100M${}_\odot$ binary, the source localization accuracy may be
improved about 2 times in general when the eccentricity increases from 0 to
0.4. For total mass 65M${}_\odot$ binary (GW150914-like binary), the
improvement factor is about 1.3 when the eccentricity increases from 0 to 0.4.
For total mass 22M${}_\odot$ binary (GW151226-like binary), such improvement is
ignorable.
