mongodb 2dsphere

First, the index introductionIn MongoDB, indexes are used to support efficient queries. If there is no index, MONGODB must scan each document in the entire collection to find a matching document. However, if an appropriate index is established,

I. MongoDB INTRODUCTION (http://docs.mongoing.com/manual/applications/geospatial-indexes.html)MongoDB provides a series of indexing and querying mechanisms to handle geospatial information. This section describes the geo-index characteristics of

First, the latitude and longitude of the representation wayThe storage of latitude and longitude in MongoDB has its own set of specifications (mainly for the purpose of establishing a geospatial index on that field). There are two ways, namely

Index typeMONGDB indexes are divided into the following types: Single-key index, composite index, geospatial Index, full-text index, and hash indexSingle-key index (single Field Indexes)An index created on a key is a single-key index, which is the

Indexes can often greatly improve the efficiency of queries, and if there is no index, MongoDB must scan every file in the collection and select those records that meet the query criteria when reading the data. This scan full set of query efficiency

This is a creation in Article, where the information may have evolved or changed. Under the latest version of the Mongodb3.2, under the MongoDB PHP driver. PHP version is php7,php operation MongoDB class file, the results of the MONGO class does not

Recently, as a commando, with colleagues in a blitz to build a simple lbs system. The current mainstream approach is to use MongoDB, because it has encapsulated the common LBS basic operations (such as looking for nearby people), the function is

Clever Use of Mongodb for geographic space query, mongodb geographical space MongoDB is a distributed file storage-based database. Written in C ++. It is designed to provide scalable, high-performance data storage solutions for WEB applications.In

The following is a brief overview of accessing the database using MongoDB's Java driver. Quick Guided Tour Using MongoDB's Java driver is simple, just make sure to add the Mongo.jar file to the classpath. 1). Get the

Brief introductionOne of the most common types of business in Express Logistics systems is the inquiry and recording of orders. Orders are characterized by the fact that the order data needs to be updated at any time as the delivery process