It's true that dist() may be even faster but remember that requires more field to be indexed, a lot of preprocess at query time to be able to yield the same calculated distance, and, as mentioned by Mats, it wouldn't take the earth' curvature into account. Lastly, LatLonPointSpatialField for example does distance calculations based on Haversine formula (Great Circle), BBoxField does it a little faster because the rectangular shape is faster to compute. To do the same with dist() you would have to compute the center point of the box to input each one of its coordinates as a function argument, so it would be too much hassle to yield the same result if you want to use an area as parameter. That makes a huge difference because you would have to index every coordinates of each point separately.īesides, you can also use geodist() as is with the BBoxField field type that indexes a single rectangle per document field and supports searching via a bounding box. It would require 2 indexed fields (or values per field at least) for 2 dimensions, 3 for 3d, and so on. In order to perform the same spatial search, you would have to specify every point's dimension separately. In geodist (sfield, x, y), sfield is a spatial field type that represents two points (lat,lon), so the direct equivalent using dist() would be to implement dist (2, sfieldX, sfieldY, x, y) with sfieldX and sfieldY being respectively the (lat,lon) coordinates of sfield. Its possible to simulate the geodist() calculation by having the distance returned from an applied geofilt operation. BBoxField (for areas, 4 instances of another field type referred to by numberType).SpatialRecursivePrefixTreeFieldType (RPT for short), including RptWithGeometrySpatialField, a derivative.

LatLonType (now deprecated) and its non-geodetic twin PointType.

Four main field types are available for spatial search : the circle of radius d) geodist: the distance function Hit highlighting Example from solr. Behind the scenes, latitude and longitude are indexed as separate numbers. NoSQL: Apache SOLR Apache Hadoop By Dmitry Kan for NerdCamp.

This field type is strictly limited to coordinates in lat/lon decimal degrees. Representation of spatial data as latitude and longitude in Solr Filtering by geofilt and bound box filters Use of the geodist function to calculate distance. Most spatial implementation are based on Lucene's Points API, which is a BKD Index. The main difference is that geodist() is intended to work with spatial field types.

Solr geodist