[pgrouting-users] question : Nearest POI name or Area Name

[bino oetomo]

Dear All

Lets say I have a lat/lon value of a node, and In my postgis table there 
also data of :
1. Point of interest
2. Area polygon with name. (i.e : a district border)

Kindly please tell me how to :
1. Find nearest POI name (may be in thight boundbox, or a defined radius 
with the node as center), or
2. Find the polygon name where this node is located.

Sincerely
-bino-