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。
The following table lists the abbreviation and full name of the HTML tag:
Label | English full name | Chinese description |
|---|---|---|
A | Anchor | Anchor |
Abbr | Abbreviation | Acronym |
Acronym | Acronym | An acronym with an acronym |
Address | Address | Address |
Alt | Alter | Substitute (usually a hint that cannot be displayed in a picture) |
B | Bold | Bold (text) |
Bdo | Direction of Text Display | Text display direction |
Big | Big | Enlarge (text) |
Blockquote | Block Quotation | Block quotation |
Br | Break | New line |
Cell | Cell | Nest |
Cellpadding | Cellpadding | Nest whitening |
Cellspacing | Cellspacing | Nest space |
Center | Centered | Center (text) |
Cite | Citation | Quote |
Code | Code | Source code (text) |
Dd | Definition Description | Definition description |
Del | Deleted | To delete (text of). |
Dfn | Defines a Definition Term | Define definition entry |
Div | Division | Separation |
Dl | Definition List | Definition list |
Dt | Definition Term | Define terms |
Em | Emphasized | To aggravate (text). |
Font | Font | Font |
H1~h6 | Header 1 to Header 6 | Headings 1 to 6 |
Hr | Horizontal Rule | Horizontal ruler |
Href | Hypertext reference | Hypertext reference |
I | Italic | Italics (text) |
Iframe | Inline frame | Define an inline framework |
Ins | Inserted | To insert (text of). |
Kbd | Keyboard | Keyboard (text) |
Li | List Item | List item |
Nl | Navigation lists | Navigation list |
ol | Ordered List | Sort list |
Optgroup | Option group | Define option groups |
P | Paragraph | Paragraph |
Pre | Preformatted | Predefined format (text) |
Q | Quotation | Quotation |
Rel | Reload | Load |
S/ strike | Strikethrough | Delete Lin |
Samp | Sample | Example (Text) |
Small | Small | Make it smaller (text) |
Span | Span | Range |
Src | Source | Source file link |
Strong | Strong | To aggravate (text). |
Sub | Subscripted | Subscript (text) |
Sup | Superscripted | Superscript (text) |
Td | Table data cell | A cell in a table |
Th | Table header cell | The header in the table |
Tr | Table row | table row |
Tt | Teletype | Printer (text) |
U | Underlined | Underscore (text) |
Ul | Unordered List | Do not sort the list |
Var | Variable | Variable (text) |