Query a Haystack Index
A haystack index is a special
2d geospatial index that is optimized to return results over small areas. To create a haystack index see Create a Haystack Index.
To query a haystack index, use the
geoSearch command. You must specify both the coordinates and the additional field to
geoSearch. For example, to return all documents with the value
restaurant in the
type field near the example point, the command would resemble:
Haystack indexes are not suited to queries for the complete list of documents closest to a particular location. The closest documents could be more distant compared to the bucket size.