11.14. HTML form

发布时间 :2024-02-23 23:00:05 UTC      

11.14.1. HTML table instance

First Name

Last Name

Points

Jill

Smith

50

Eve

Jackson

94

John

Doe

80

Adam

Johnson

67

11.14.2. HTML form

The form is composed of <table> tag to define. Each table has several rows (made up of <tr> tag definition), each row is divided into severalcells (by <td> label definition). The letter td refers to tabular data(table data), that is, the contents of data cells. Data cells can contain text, pictures, lists, paragraphs, forms, horizontal lines, tables, and so on.

11.14.3. Table example

Example

<tableborder="1"><tr><td>row 1, cell 1</td><td>row 1, cell
2</td></tr><tr><td>row 2, cell 1</td><td>row 2, cell 2</td></tr></table>

It appears in the browser as follows:

Image1

11.14.4. HTML Table and Border Properties

If you do not define border properties, the table does not display borders. Sometimes this is useful, but most of the time, we want to display the border.

Use the border properties to display a table with borders:

Example

<tableborder="1"><tr><td>Row 1, cell 1</td><td>Row 1, cell
2</td></tr></table>

11.14.5. HTML table header

Use of the header of the table <th> tag is defined.

Most browsers display the header as text centered in bold:

Example

<tableborder="1"><tr><th>Header 1</th><th>Header 2</th></tr><tr><td>row
1, cell 1</td><td>row 1, cell 2</td></tr><tr><td>row 2, cell
1</td><td>row 2, cell 2</td></tr></table>

It appears in the browser as follows:

Image2

11.14.6. HTML form label

Label

Description

< table >

Define form

< th >

Define the header of the table

< tr >

Define the rows of the table

< td >

Define table cells

< caption >

Define the table title

< colgroup >

Define the group of table columns

< col >

Define properties for table columns

< thead >

Define the header of the table

< tbody >

Define the body of the table

< tfoot >

Define the footer of the table

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.