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。
11.9.1. HTML text formatting ¶
Bold text
Italic text
HTML uses tags < b > (“bold”) and < I > (“italic”) to format the output text, such as bold or italics These HTML tags are called formatting tags (see the complete tag reference manual at the bottom). Usual label Label Description < b > Define bold text < em > Define emphasis text < I > Define italics < small > Define a small word < strong > Define the emphasis mood < sub > Define subscript < sup > Define superscript < ins > Define insert word < del > Define delete word Label Description < code > Define computer code < kbd > Define keyboard code < samp > Define computer code samples < var > Define variable < pre > Define preformatted text Label Description < abbr > Define abbreviations < address > Define addr < bdo > Define text orientation < blockquote > Define long references < Q > Define a short quotation < cite > Define citation, citation < dfn > Define a definition project. Computer automatic output is subscript and superscript HTML formatting label ¶
replace bold label to use replace label use. However, the meanings of these labels are different: and defines bold or italic text. or means that the text you want to present is important, so highlight it. All major browsers today can render fonts with various effects. However, browsers may support better rendering in the future. HTML text formatting label ¶
HTML computer output label ¶
HTML citations, citations, and tag definitions ¶