May 2011
Intermediate to advanced
112 pages
2h 58m
English
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Chapter 4. Geolocation and Mapping APIs
Chapter 3 introduced us to using the W3C Geolocation API to collect location information from the user’s browser with JavaScript code. Although that is the whole point of this book, it is not extremely useful to collect geolocation information unless you, the developer, are going to do something with it. One effective application for collecting a user’s location is to place that point on a map. Let’s face it, mapping a location (or multiple locations) is a common thing to do in the world of GIS.
There are many solutions available for web-mapping applications—Google Maps JavaScript API V3, Bing Maps AJAX Control, Version 7.0, Esri ArcGIS JavaScript API 2.2, Yahoo Maps AJAX API, and OpenStreetMap API v0.6 to name a few (more than a few actually). Most of the APIs available to do web mapping are very similar in nature. Because of this, I have decided to focus on just a couple of the APIs available, and leave it up to you to pick the API that best suits your needs.
After giving you a taste of these APIs for use in your applications, we can then explore what to do with the information you have collected so that it can be referenced by other applications or replotted in the future. This is as important as being able to map the geolocations being collected, since most GIS applications are going to be interested in more than a single user’s point information. To this end, we will look at different ways to save our geolocation information so that it ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.