Rounding Float Array

Hello,

I have a float array holding geo location information.

geoloc
-----------------------------------
{5.3443133704554,100.29457569122}
{5.3885574294704,100.29601335526}
{3.1654978750403,101.60915851593}
{5.3766154817748,100.31472444534}
{3.1545014704258,101.70036971569}
(5 rows)

Is there an easy way to round all values to 4 decimals.

I can round the individual values and return them seperately but I need to
return them as an array.

lat | long
---------+-----------
5.34431 | 100.29458
5.38856 | 100.29601
3.16550 | 101.60916
5.37662 | 100.31472
3.15450 | 101.70037
(5 rows)

Any suggestion is highly appreciated.

Thanks
Alex