3. Mongodb

  • 3.1. MongoDB tutorial

    MongoDB is a database based on distributed file storage. Written in C++ language. Designed to provide scalable high-perfo...
    2025-10-25 13:34:22 UTC
  • 3.2. Introduction to NoSQL

    NoSQL (NoSQL = Not Only SQL), which means “not just SQL”. In modern computing systems, a huge amount of data is generated ...
    2025-10-25 13:34:20 UTC
  • 3.3. What is MongoDB?

    MongoDB is written in C++ language and is an open source database system based on distributed file storage. In the case of...
    2025-10-25 13:34:21 UTC
  • 3.4. Install MongoDB on Windows platform

    3.4.1. MongoDB download ¶ MongoDB provides precompiled binaries for 32-bit and 64-bit systems. You can download and i...
    2025-10-25 13:34:25 UTC
  • 3.5. Install MongoDB on Linux platform

    MongoDB provides 64-bit installation packages for all linux distributions, which you can download from the official website....
    2025-10-25 13:34:23 UTC
  • 3.6. Install MongoDB on Mac OSX platform

    MongoDB provides a 64-bit installation package on the OSX platform, which you can download from the official website. Down...
    2025-10-25 13:34:24 UTC
  • 3.7. Concept Analysis of MongoDB

    No matter what database we study, we should learn the basic concepts. The basic concepts in mongodb are documents, collectio...
    2025-10-25 13:34:21 UTC
  • 3.8. MongoDB-connection

    In this tutorial we will discuss the different ways to connect to MongoDB. 3.8.1. Start the MongoDB service ¶ In th...
    2025-10-25 13:34:21 UTC
  • 3.9. MongoDB creates a database

    3.9.1. Grammar ¶ The syntax format for MongoDB to create a database is as follows: use DATABASE_NAME If the da...
    2025-10-25 13:34:24 UTC
  • 3.10. MongoDB deletes the database

    3.10.1. Grammar ¶ The syntax format for MongoDB to delete a database is as follows: db.dropDatabase() Delete t...
    2025-10-25 13:34:20 UTC
  • 3.11. MongoDB creates a collection

    In this section, we show you how to use MongoDB to create collections. Used in MongoDB createCollection() Method to crea...
    2025-10-25 13:34:24 UTC
  • 3.12. MongoDB delete collection

    In this section, we show you how to use MongoDB to delete collections. Used in MongoDB drop() Method to delete the col...
    2025-10-25 13:34:25 UTC
  • 3.13. MongoDB inserts a document

    In this section, we will show you how to insert data into a collection of MongoDB. The data structure of the document is b...
    2025-10-25 13:34:22 UTC
  • 3.14. MongoDB updates the document

    MongoDB usage update() And save() Method to update the documents in the collection. Next, let’s take a detailed look at ...
    2025-10-25 13:34:24 UTC
  • 3.15. MongoDB deletes a document

    In the previous chapters, we have learned how to add and update data for collections in MongoDB. In this section we will con...
    2025-10-25 13:34:23 UTC
  • 3.16. MongoDB query document

    MongoDB query document usage find() Method. find() Method to display all documents in an unstructured way. 3.1...
    2025-10-25 13:34:23 UTC
《地理信息系统原理、技术与方法》  97

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。