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。
In this section, we introduce the applications on Vue forms.
We can use v-model instructions in the form 、 and creates a two-way data binding on elements such as.
The v-model correct method is automatically selected to update the element based on the control type.
v-model all form elements are ignored value 、 checked 、 selected property, using the data initial value is declared in the
v-model internally use different attributes for different input elementsand throw different events:
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textandtextareaelement usagevalueproperties andinputevent -
checkboxandradiousecheckedproperties andchangeevent -
selectfield willvalueas an attribute and set thechangeas an event.
2.15.1. Input box ¶
The example demonstrates the input and textarea element used in the v-model implement two-way data binding:
input element:
input The form message is: {{ message }}
textarea element:
textarea The form message is:
{{ message2 }} In the text area textarea interpolation does not work and needs to be used v-model instead of:
Check box ¶
If the check box is a logical value, if there are more than one, bind to thesame array:
2.15.2. Check box ¶
The two-way data binding of check boxes is demonstrated in the following example:
Single checkbox:
{{ checked }}Single checkbox:
Runoob Google taobao
The selected value is: {{ checkedNames }} The effect of checking the check box in the instance is as follows:
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1. Angularjs2
8
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1. SVG tutorial
19
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1. Memcached
20
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1. C# tutorial
61
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1. Sqlite
47
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2. Go
43
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2. Docker
59
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2. Vue3
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2.15. Vue3 form
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2.4. Vue3 creates a project
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2.5. Vue3 directory structure
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2.9. Vue.js loop statement
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2.8. Vue3 conditional statement
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2.12. Vue3 snooping Properties
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2.13. Vue3 style binding
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2.18. Vue3 blending
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2.11. Vue3 calculation Properties
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2.16. Vue3 custom instruction
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2. Servlet
21
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3. React
23
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3. SOAP tutorial
10
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3. Android
18
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3. Mongodb
44
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3. Kotlin
18
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4. Lua
31
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4. MySQL tutorial
35
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12
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45
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41
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web
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39
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44
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11. HTML tutorial-(HTML5 Standard)
54
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12. Http
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13. Regex
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14. Regexp
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1. Introduction to geographic information system
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2. From the Real World to the Bit World
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3. Spatial Data Model
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4. 空间参照系统和 地图投影
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5. Data in GIS
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6. Spatial data acquisition
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7. Spatial Data Management
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8. Spatial analysis
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9. 数字地形模型( DTM )与地形分析
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10. 空间建模与 空间决策支持
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11. Spatial data representation and map making
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12. 3S Integration Technology
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13. 网络地理信息系统
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14. Examples of Geographic Information System Application
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15. Organization and Management of Geographic Information System Application Projects
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16. Geographic Information system Software Engineering Technology
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17. Geographic Information System Standards
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18. Geographic Information System and Society
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19. Earth Information Science and Digital Earth
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