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。
Don’t worry about the examples you haven’t learned in this chapter.
You will learn about them in the following chapters. The HTML title (Heading) is defined by the < H1 >-< h6 > tag. HTML paragraphs are done through tags. HTML links are made through tags Tip: in You will learn more about attributes later in this tutorial. HTML images are created by tagging Note: the name and size of the image are provided in the form of attributes. 11.4.1. HTML title ¶
Example ¶
<h1>This is a titleh1><h2>This is a titleh2><h3>This is a titleh3>
11.4.2. HTML paragraph ¶
to define it. Example ¶
<p>This is a paragraph.p><p>This is another paragraph.p>
11.4.3. HTML link ¶
to define it. Example ¶
<ahref="https://www.runoob.com">This is a linka>
href property to specify the address of the link. 11.4.4. HTML image ¶
to define it.
Example ¶
<imgsrc="/images/logo.png"width="258"height="39"/>