Benches in identical locations - not showing on the map

[edent]

Some benches have identical lat/longs:

On the main map, the bench icons overlap, so only one is visible:

Not sure if they can be clustered, or dithered.

[edent]

Currently 4,808 benches have this problem.

SELECT `benchID`, `latitude`, `longitude`
FROM `benches`
WHERE (`latitude`, `longitude`) IN (
    SELECT `latitude`, `longitude`
    FROM benches
    GROUP BY `latitude`, `longitude`
    HAVING COUNT(*) > 1
)  
ORDER BY `benches`.`latitude` DESC