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Google Maps API 3

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Unduh - Bebas
Nguyễn Gia Hào

Academic year: 2023

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About the Author

About the Technical Reviewer

Acknowledgments

Introduction

Who This Book Is For

Downloading the Code

Introducing the Google Maps API

That's why the Maps API includes methods for making Ajax calls and other things that we now depend on other third-party libraries to do for us. This is not something to worry about as the Google Maps API only uses the decimal degree form.

Figure 1-1. The impact of the Deepwater Horizon oil spill visualized in Google Maps
Figure 1-1. The impact of the Deepwater Horizon oil spill visualized in Google Maps

Transferring from Version 2 to 3

GLOBAL VARIABLES ARE EVIL

I think this is great as it makes the API consistent and makes it really easy to extend. An example of this is when you need to use map boundaries.

Synchronous method calls

You cannot simply call the Map object's getBounds() method after initializing the map, because the map is not ready at that point and has no boundaries. Instead, you should listen for the bounds_changed event before trying to grab it.

Asynchronous method calls

Create a new polygon and immediately add it to the map var polyline = new google.maps.Polyline({. Create a new polygon and immediately add it to the map var polyline = new google.maps.Polyline({.

Figure 2-2. v2 vs. v3. The biggest difference in appearance is the look of the navigation bar, but it also groups the map type options a bit differently
Figure 2-2. v2 vs. v3. The biggest difference in appearance is the look of the navigation bar, but it also groups the map type options a bit differently

Creating Your First Map

It is loaded with the

Gambar

Figure 1-1. The impact of the Deepwater Horizon oil spill visualized in Google Maps
Figure 1-2. The center of the world at latitude 0 and longitude 0 lays somewhere outside the west coast of Africa
Figure 1-3. The coordinates for some major cities in the world. Notice when the values are negative and when they are positive
Figure 2-3. In v3 it’s possible to have several InfoWindow objects open at the same time, something that was impossible in v2
+7

Referensi

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Creating Your First Map OBJECT LITERALS AND JSON Taking the Map Further with MapOptions X Marks the Spot CONTROLLING THE SIZE OF THE WINDOW ARRAY CONFUSION Marker Icons InfoWindow Tips and Tricks Creating Polylines and Polygons Dealing with Massive Numbers of Markers

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