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。
7.5.1. Bootstrap 5 default settin ¶
Bootstrap 5 default font-size for 16px line-height 1.5.
Default font-family For “Helvetica Neue”, Helvetica, Arial, sans-serif.
In addition, all element margin-top: 0 、 margin-bottom: 1rem (16px).
7.5.2. < H1 >-< h6 > ¶
The style of all HTML headings (H1 to H6) is defined in Bootstrap. Take a look at the following example:
Example
<div class="container"> <h1>h1 Bootstrap titleh1> <h2>h2 Bootstrap titleh2> <h3>h3 Bootstrap titleh3> <h4>h4 Bootstrap titleh4> <h5>h5 Bootstrap titleh5> <h6>h6 Bootstrap titleh6> div> You can also use it. .h1 to .h6 class to style the element:
Example
<div class="container"> <p class="h1">h1 Bootstrap titlep> <p class="h2">h2 Bootstrap titlep> <p class="h3">h3 Bootstrap titlep> <p class="h4">h4 Bootstrap titlep> <p class="h5">h5 Bootstrap titlep> <p class="h6">h6 Bootstrap titlep> div> Display title class ¶
Bootstrap also provides four Display classes to control the style of titles: .display-1 , .display-2 , .display-3 , .display-4 .
Example
<div class="container"> <h1>Display titleh1> <p>Display Titles can output larger and bolder font styles.p> <h1 class="display-1">Display 1h1> <h1 class="display-2">Display 2h1> <h1 class="display-3">Display 3h1> <h1 class="display-4">Display 4h1> div> 7.5.3. < small > ¶
HTML in Bootstrap 5 element is used to create smaller, lighter text: Example
<div class="container"> <h1>Smaller Text Titleh1> <p>small Elements are used for smaller font sizes and lighter color text:p> <h1>h1 Title <small>subtitlesmall>h1> <h2>h2 Title <small>subtitlesmall>h2> <h3>h3 Title <small>subtitlesmall>h3> <h4>h4 Title <small>subtitlesmall>h4> <h5>h5 Title <small>subtitlesmall>h5> <h6>h6 Title <small>subtitlesmall>h6> div> 7.5.4. < mark > ¶
Bootstrap 5 definition labels and .mark class has a yellow background and has a certain inner margin: Example
<div class="container"> <h1>Highlight Texth1> <p>Use the mark element to <mark>Highlightmark>Text.p> div> 7.5.5. < abbr > ¶
Bootstrap 5 defines HTML the style of the element is a dashed border displayed at the bottom of the text: Example
<div class="container"> <h1>Abbreviationsh1> <p>The abbr element is used to mark up an abbreviation or acronym:p> <p>The <abbr title="World Health Organization">WHOabbr> was founded in 1948.p> div> 7.5.6. < blockquote > ¶
For referenced content, you can use the add on .blockquote class: Example
<div class="container"> <h1>Blockquotesh1> <p>The blockquote element is used to present content from another source:p> <blockquote class="blockquote"> <p>For 50 years, WWF has been protecting the future of nature. The world's leading conservation organization, WWF works in 100 countries and is supported by 1.2 million members in the United States and close to 5 million globally. <footer class="blockquote-footer">From WWF's website blockquote> div> 7.5.7. < dl > ¶
Bootstrap 5 defines HTML the style of the element is as follows: Example
<div class="container"> <h1>Description Listsh1> <p>The dl element indicates a description list:p> <dl> <dt>Coffeedt> <dd>- black hot drinkdd> <dt>Milkdt> <dd>- white cold drinkdd> dl> div> 7.5.8. < code > ¶
Bootstrap 5 defines HTML the style of the element is as follows: Example
<div class="container"> <h1>code snippeth1> <p>You can put some code elements inside the code elements:p> <p>The following HTML elements: <code>spancode>, <code>sectioncode>, 和 <code>divcode>Used to define partial document content.p> div> 7.5.9. < kbd > ¶
Bootstrap 5 defines HTML the style of the element is as follows: Example
<div class="container"> <h1>Keyboard Inputsh1> <p>To indicate input that is typically entered via the keyboard, use the kbd element:p> <p>Use <kbd>ctrl + pkbd> to open the Print dialog box.p> div> 7.5.10. < pre > ¶
Bootstrap 5 defines HTML the style of the element is as follows: Example
<div class="container"> <h1>Multiple Code Linesh1> <p>For multiple lines of code, use the pre element:p> <pre> Text in a pre element is displayed in a fixed-width font, and it preserves both spaces and line breaks. pre> div> 7.5.11. More typesetting classes ¶
The following table provides examples of more Bootstrap5 typesetting classes:
Class name
Description
.lead
Make the paragraph more prominent
.small
Specify smaller text (85% of the parent element)
.text-start
Align left
.text-center
In the middle
.text-end
Align right
.text-justify
Set the text alignment, and automatically wrap the text beyond the screen inthe paragraph
.text-nowrap
The part beyond the screen in the paragraph does not wrap.
.text-lowercase
Set lowercase text
.text-uppercase
Set text capitalization
.text-capitalize
Set the first letter of a word in uppercase
.initialism
The text displayed in the < abbr > element is displayed in a small font and can be converted from lowercase to uppercase.
.list-unstyled
Remove the default list style and align the list items to the left (in < ul > and < ol >). This class applies only to direct sublist items (if you need to remove nested list items, you need to use this style in nested lists)
.list-inline
Place all list items in the same row
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1. Angularjs2
8
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1. SVG tutorial
19
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20
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61
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47
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web
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6
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26
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44
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11. HTML tutorial-(HTML5 Standard)
54
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6
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6
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8
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1. Introduction to geographic information system
6
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2. From the Real World to the Bit World
3
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3. Spatial Data Model
7
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4. 空间参照系统和 地图投影
5
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5. Data in GIS
3
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6. Spatial data acquisition
2
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7. Spatial Data Management
6
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8. Spatial analysis
8
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9. 数字地形模型( DTM )与地形分析
5
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10. 空间建模与 空间决策支持
6
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11. Spatial data representation and map making
6
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12. 3S Integration Technology
5
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13. 网络地理信息系统
3
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14. Examples of Geographic Information System Application
8
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15. Organization and Management of Geographic Information System Application Projects
9
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6
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3
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3
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3
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23
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31
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41
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37
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7.19. Bootstrap5 drop-down menu
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7.35. Bootstrap5 input box group
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7.11. Bootstrap5 button
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7.2. Bootstrap5 installation and use
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7.7. Bootstrap5 form
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7.17. Bootstrap5 list group
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7.29. Bootstrap5 gadget
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7.31. Bootstrap5 form
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7.3. Bootstrap5 container
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7.32. Bootstrap5 drop-down menu
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10. Markdown
10
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12
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20
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17
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11
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15
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56