7. Django

  • There are many different Web frameworks under Python. Django is the most representative of the heavyw…
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  • 7.2.1. Basic introduction ¶ Django is an open source Web application fram…
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  • Before installing Django, the system needs a development environment that already has Python installed. Next, let’s take…
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  • In this chapter, we will introduce Django management tools and how to use Django to create a project. For the first proj…
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  • In the previous chapter, we used django.http.HttpResponse () to output “Hello World!” . This method mixes the data with …
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  • Django provides good support for a variety of databases, including: PostgreSQL, MySQL, SQLite, Oracle. Django p…
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  • HTML forms are a classic way to interact with a website. This chapter describes how to use Django to process form data s…
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  • 7.8.1. View layer ¶ A view function, called View for short, is a simple P…
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  • Simply speaking, routing is to judge the corresponding handler according to the URL link requested by the user, and retu…
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  • Django provides web-based management tools. Django automatic management tools are part of django.contrib. You c…
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  • You need to read this chapter before you read it. Django 模型 Perform basic configuration and understand so…
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  • The relationships between tables can be divided into the following three categories: 一对一 …
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  • 7.13.1. Aggregate query (aggregate) ¶ Aggregate query functions perform c…
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  • The Django Form component is used to initialize the page, generate HTML tags, and validate the data submitted by the use…
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  • The Django user authentication (Auth) component is generally used in the login registration of users to determine whethe…
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  • Cookie is a text file stored on the client computer and retains a variety of tracking information. Identifying …
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  • Django middleware is a hook that modifies Django request or response objects, which can be understood as a process betwe…
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  • FBV(function base views) A function-based view is to use a function to handle requests in the view. …
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  • In the previous chapter, we used python manage.py runserver To run the server. This applies only to test …
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Principles, Technologies, and Methods of Geographic Information Systems  102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.