最近几年来,地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持,如城市管理、区划、环境整治等等,地理信息成为信息时代重要的组成部分之一; “数字地球”概念的提出,更进一步推动了作为其技术支撑的GIS的发展。 与此同时,一些学者致力于相关的理论研究,如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面,并且这两个方面构成了相互促进的发展过程。
MongoDB provides 64-bit installation packages for all linux distributions, which you can download from the official website.
We need to install each Linux platform dependency package before installation.
Red Hat/CentOS:
sudo yum install libcurl openssl Ubuntu 18.04 LTS (“Bionic”)/Debian 10 “Buster”:
sudo apt-get install libcurl4 openssl Ubuntu 16.04 LTS (“Xenial”)/Debian 9 “Stretch”:
sudo apt-get install libcurl3 openssl MongoDB source code download address: https://www.mongodb.com/download-center#community


Here we choose tgz to download, download the installation package, and extract it. tgz (the installation on 64-bit Linux is demonstrated below).
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu1604-4.2.8.tgz # 下载 tar -zxvf mongodb-linux-x86_64-ubuntu1604-4.2.8.tgz # 解压 mv mongodb-src-r4.2.8 /usr/local/mongodb4 # 将解压包拷贝到指定目录 The executable file for MongoDB is located in the bin directory, so you can add it to the PATH In path:
export PATH=/bin:$PATH The installation path for your MongoDB. As in this article /usr/local/mongodb4 . export PATH=/usr/local/mongodb4/bin:$PATH
3.5.1. Create a database directory ¶
By default, the following two directories are initialized when MongoDB starts:
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Data storage directory: / var/lib/mongodb
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Log file directory: / var/log/mongodb
Before starting, we can create these two directories and set the current user to have read and write permissions:
sudo mkdir -p /var/lib/mongo sudo mkdir -p /var/log/mongodb sudo chown `whoami` /var/lib/mongo # 设置权限 sudo chown `whoami` /var/log/mongodb # 设置权限
Next, start the Mongodb service:
mongod --dbpath /var/lib/mongo --logpath /var/log/mongodb/mongod.log --fork
Open the / var/log/mongodb/mongod.log file and see the following message indicating that the startup was successful.
# tail -10f /var/log/mongodb/mongod.log 2020-07-09T12:20:17.391+0800 I NETWORK [listener] Listening on /tmp/mongodb-27017.sock 2020-07-09T12:20:17.392+0800 I NETWORK [listener] Listening on 127.0.0.1 2020-07-09T12:20:17.392+0800 I NETWORK [listener] waiting for connections on port 27017
3.5.2. MongoDB backend manages Shell ¶
If you need to enter the mongodb background management, you need to first open the bin directory under the mongodb installation directory, and then execute the mongo command file.
MongoDB Shell is an interactive Javascript shell that comes with MongoDB, which is used to operate and manage MongoDB.
When you enter the mongoDB background, it will link to the test document (database) by default:
$ cd /usr/local/mongodb4/bin $ ./mongo MongoDB shell version v4.2.8 connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb Implicit session: session { "id" : UUID("2cfdafc4-dd56-4cfc-933a-187b887119b3") } MongoDB server version: 4.2.8 Welcome to the MongoDB shell. …… Because it is a JavaScript shell, you can run some simple arithmetic operations:
> 2+2 4 > 3+6 9
Now let’s insert some simple data and retrieve the inserted data:
> db.runoob.insert({x:10}) WriteResult({ "nInserted" : 1 }) > db.runoob.find() { "_id" : ObjectId("5f069bdb4e02f8baf90f1184"), "x" : 10 } >
The first command inserts the number 10 into the x field of the runoob collection.
To stop mongodb, you can use the following command:
mongod --dbpath /var/lib/mongo --logpath /var/log/mongodb/mongod.log --shutdown
It can also be found in mongo To implement in the command exit of
> use admin switched to db admin > db.shutdownServer()
More installation methods can be found on the official website: https://docs.mongodb.com/manual/administration/install-on-linux/
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1. Angularjs2
8
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1. SVG tutorial
19
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1. Memcached
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1. C# tutorial
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1. Sqlite
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2. Go
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2. Vue3
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2. Servlet
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3. SOAP tutorial
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3. Android
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3. Mongodb
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3.24. MongoDB fragmentation
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3.15. MongoDB deletes a document
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3.31. MongoDB relation
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3.4. Install MongoDB on Windows platform
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3.25. MongoDB backup (mongodump) and recovery (mongorestore)
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3.26. MongoDB monitoring
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3.21. MongoDB index
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3.34. MongoDB query analysis
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3.23. MongoDB replication (replica set)
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3.6. Install MongoDB on Mac OSX platform
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3. Kotlin
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web
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11. HTML tutorial-(HTML5 Standard)
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1. Introduction to geographic information system
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2. From the Real World to the Bit World
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3. Spatial Data Model
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4. 空间参照系统和 地图投影
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5. Data in GIS
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6. Spatial data acquisition
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7. Spatial Data Management
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8. Spatial analysis
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9. 数字地形模型( DTM )与地形分析
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10. 空间建模与 空间决策支持
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11. Spatial data representation and map making
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12. 3S Integration Technology
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13. 网络地理信息系统
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14. Examples of Geographic Information System Application
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15. Organization and Management of Geographic Information System Application Projects
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16. Geographic Information system Software Engineering Technology
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17. Geographic Information System Standards
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18. Geographic Information System and Society
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19. Earth Information Science and Digital Earth
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