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This article mainly explains "how to use the geographical location function of HTML5". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to use the geographic location function of HTML5.

This is a HTML5 API that is used to get the geographic location of the user of the site, and the user must first allow the site to get his or her location. This is usually done through buttons and / or browser pop-up windows. All the latest versions of Chrome, Firefox, IE, Safari, and Opera can use the geolocation feature of HTML5.

Some uses of geographical location are:

Public transport website

Taxis and other transportation websites

E-commerce website calculates freight

Travel agency website

Real estate website

The cinema website of movies shown nearby

Online games

The home page of the website provides local title and weather.

The job position can automatically calculate the commuting time

How it works: geographical locations work by scanning common sources of location information, including the following:

The global positioning system (GPS) is the most accurate

Network signals-IP address, RFID, Wi-Fi, and Bluetooth MAC address

GSM/CDMA Cellular ID

User input

The API provides a very convenient function to detect geolocation support in the browser:

If (navigator.geolocation) {

/ / do stuff

}

GetCurrentPosition API is the main method of using geographic location. It retrieves the current geographic location of the user's device. The location is described as a set of geographical coordinates as well as heading and speed. The location information is returned as a location object.

The syntax is:

GetCurrentPosition (showLocation, ErrorHandler, options)

ShowLocation: defines a callback method for retrieving location information.

ErrorHandler (optional): defines a callback method that is called when an error occurs while handling an asynchronous call.

Options (optional): defines a set of options for retrieving location information.

We can provide location information to users in two ways: geodesic and civilian.

The geodesic way of describing the location points directly to latitude and longitude.

The civil representation of location information is human readable and easy to understand.

As shown in Table 1 below, each attribute / parameter has geodesic and civilian representations.

Thank you for your reading, the above is the content of "how to use the geographical location function of HTML5". After the study of this article, I believe you have a deeper understanding of how to use the geographical location function of HTML5, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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