By Andre Lewis, Cameron Turner, Jeffrey Sambells, Michael Purvis
The Google Maps API continues to be one of many show off examples of the net 2.0 improvement paradigm. starting Google Maps functions with Rails and Ajax: From amateur to specialist is the 1st e-book to comprehensively introduce the provider from a developer viewpoint, displaying you the way you could combine mapping good points into your Rails-driven internet applications.Proceeding a long way past simplistic map show, you will methods to draw from a number of info resources comparable to the U.S. Census Bureau's TIGER/Line information and Google's personal geocoding function to construct complete geocoding prone for mapping many destinations round the world.The e-book additionally steers you thru a number of examples that convey find out how to motivate consumer interplay resembling via pinpointing map destinations, including reviews, and development community-driven maps. you might want to decide up a replica of this ebook simply because * this can be the 1st publication to comprehensively introduce the Google Maps software improvement utilizing the Rails improvement framework. * you will be brought to the very most modern adjustments to the Google Maps API, embodied within the model 2 free up. * it really is written by way of 4 builders actively focused on the production of location-based mapping companies.
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Additional resources for Beginning Google Maps Applications with Rails and Ajax: From Novice to Professional
Creating the Map and Marking Points You may have noticed in Chapter 2 that you declared the map variable outside the init() function in Listing 2-2. js file. It will also ensure you’re targeting the same map object. Also, you may want to add some of the control objects mentioned in Chapter 2, such as GMapTypeControl. Listing 3-1 highlights the map variable and additional controls. js file with the code in this listing. Listing 3-1. onunload = GUnload; Now you have a solid starting point for your web application.
For this example, we’ll use the Golden Gate Bridge in San Francisco (Figure 2-2). It’s a large landmark and is visible in the satellite imagery provided on Google Maps. qxd 2/2/07 9:32 AM Page 19 CHAPTER 2 ■ GETTING STARTED Figure 2-2. The Golden Gate Bridge satellite imagery from Google Maps ■Caution If you use Google Maps to search for landmarks, the Link to This Page URL won’t immediately contain the latitude and longitude variable but will instead have a parameter containing the search terms.
We assigned the new GLatLng object to a variable, and then we were able to use it twice: first to center the map, and then a second time to create the marker. The exciting part isn’t creating one marker; it’s creating many markers. But before we come to that, you must quickly look at the Google Maps facility for showing information bubbles. WHITHER THOU, GICON? You can see that we didn’t actually use a GIcon object anywhere in Listing 2-5. If we had one defined, it would be possible to make the marker take on a different appearance, like so: var marker = new GMarker(my_GLatLng, my_GIcon); However, when the icon isn’t specified, the API assumes the red inverted teardrop as a default.
Beginning Google Maps Applications with Rails and Ajax: From Novice to Professional by Andre Lewis, Cameron Turner, Jeffrey Sambells, Michael Purvis