We’re trying to index a polygon into solr and then filter/calculate geodist on
the polygon (ideally we actually want a circle, but it looks like that’s not
really supported officially by wkt/geojson and instead you have to switch
format=”legacy” which seems like something that might be removed in the future
so don’t want to rely on it).
Here’s the info from schema:
<field name="latlng" type="location_rpt" indexed="true" stored="true"
multiValued="true"/>
<fieldType name="location_rpt" class="solr.SpatialRecursivePrefixTreeFieldType"
geo="true" distErrPct="0.025" maxDistErr="0.000009"
distanceUnits="kilometers"
spatialContextFactory="Geo3D"/>
We’ve tried indexing some different data, but to keep it as simple as possible
we started with a triangle (will eventually add more points to approximate a
circle). Here’s an example document that we’ve added just for testing:
{
"latlng": ["POLYGON((33.7942704 -84.4412613, 33.7100611 -84.4028091, 33.7802888
-84.3279648, 33.7942704 -84.4412613))"],
"ID": "284598223"
}
However, it seems like filtering/distance calculations aren’t working (at least
not the way we are used to doing it for points). Here’s an example query where
the pt is several hundred kilometers away from the polygon, yet the document
still returns. Also, it seems that regardless of origin point or polygon
location the calculated geodist is always 20015.115
Example query:
select?d=1&fl=ID,latlng,geodist()&fq=%7B!geofilt%7D&indent=on&pt=33.9798087,-94.3286133&q=*:*&sfield=latlng&wt=json
Example documents coming back anyway:
"docs": [
{
"latlng": ["POLYGON((33.7942704 -84.4412613, 33.7100611 -84.4028091, 33.7802888
-84.3279648, 33.7942704 -84.4412613))"],
"ID": "284598223",
"geodist()": 20015.115
},
{
"latlng": ["POLYGON((33.7942704 -84.4412613, 33.7100611 -84.4028091, 33.7802888
-84.3279648, 33.7942704 -84.4412613))"],
"ID": "284600596",
"geodist()": 20015.115
}
]
Anyone who has experience in this area can you point us in the right direction
about what we’re doing incorrectly with either how we are indexing the data
and/or how we are querying against the polygons.
Thank you,
--
Marshall Sanders
Principal Software Engineer
Autotrader.com
[email protected]<mailto:[email protected]>
