Elasticsearch
allows users to index geo points as a part of document. The Elasticsearch
provides an inbuilt datatype named ‘geo_point’ to get the latitude and
longitude data indexed.
Let’s see how
the geo points can be stored and searched with a simple example.
Mapping data:
curl -XPUT
http://localhost:9200/simplyjava/user -d '{
" user":{
"properties":
{
"location":{
"type":" geo_point"
}
}
}
}’
Indexing
data:
The data for geo_points can
be indexed using the below code snippet.
curl -XPOST
http://localhost:9200/simplyjava/user/testuser1 -d '{
"location":{
"lat":"80.234",
"lon":"-120.4"
}
}’
Searching
data:
Below code can be used to retrieve the
list of people who are within a particular mile radius from a geo location.
curl -XGET 'http://localhost:9200/simplyjava/user/_search?pretty=true'
-d '{
"query":
{
"filtered":{
"filter" : {
"geo_distance" :
{
"distance" : "1000miles",
"location" : {
"lat" : 70.12,
"lon" : -120.4
}
}
}
}
}
}'
Elasticsearch
Response:
{
"took": 131,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index":
"simplyjava",
"_type":
"user",
"_id": "1",
"_score": 1,
"_source": {
"location": {
"lat":
"80.234",
"lon":
"-120.4"
}
}
}
]
}
}
