Question

使用以下脚本向neo4j添加数据。数据已成功添加，但查询存在问题。仅当我在数据库中给出确切的lat和long节点时，查询才有效。任何其他坐标都会导致空集。

import csv
import requests
import json

headers = {'content-type': 'application/json'}

# Create geom index
url = "http://localhost:7474/db/data/index/node/"
payload= {
  "name" : "geom",
  "config" : {
    "provider" : "spatial",
    "geometry_type" : "point",
    "lat" : "lat",
    "lon" : "lon"
  }
}

r = requests.post(url, data=json.dumps(payload), headers=headers, auth=('neo4j', 'thanks123'))

with open('/home/haripriya/workspace/ContentMatching/src/main/resources/coords.csv', 'rb') as f:   # read data file
    reader = csv.reader(f, delimiter='\t')
    for row in reader:
    # create airport node
    url = "http://localhost:7474/db/data/node"
    payload = {'name': row[0], 'street': row[1], 'city': row[2], 'state': row[3], 'pin': row[4], 'lon': float(row[5]), 'lat': float(row[6])}
    r = requests.post(url, data=json.dumps(payload), headers=headers, auth=('neo4j', 'thanks123'))
    node = r.json()['self']

    #add node to geom index
    url = "http://localhost:7474/db/data/index/node/geom"
    payload = {'value': 'dummy', 'key': 'dummy', 'uri': node}
    r = requests.post(url, data=json.dumps(payload), headers=headers, auth=('neo4j', 'thanks123'))

    #add node to Spatial index
    url = "http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addNodeToLayer"
    payload = {'layer': 'geom', 'node': node}
    r = requests.post(url, data=json.dumps(payload), headers=headers, auth=('neo4j', 'thanks123'))

示例节点： A 29.6490287781 -98.4621124268 B 30.2107849121 -95.7507781982

START n = node：geom（'withinDistance：[29.6490287781，-98.4621124268,50.0]'）RETURN n返回节点A，但

START n = node：geom（'withinDistance：[29.6490287780，-98.4621124260,50.0]'）RETURN n返回空集

Answer 1

在stackoverflow上发现了类似的问题。答案有所帮助。请找到以下链接：

Neo4j Spatial return only one node

谢谢！

距离内的Neo4J Spatial仅返回完全匹配

1 个答案: