Latitude-Longitude info for point layer

Hi experts,
In Oracle Spatial database I've layer of small towns and villages (SRID 8307), (loaded from ESRI shape files) and I need to perform search in this layer by latitude and longitude, specified by the user. I build WEB application based on OracleMaps. Could you prompt me in which way using latitude and longitude, specified by the user application could reflect nearest town/village ?
THANK YOU in advance !

Have a look at the SDO_NN Function.
The function uses the spatial index to identify the nearest neighbors for a geometry.
Udo

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