May 2016
Beginner to intermediate
446 pages
10h 7m
English
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Chapter 9. Improving the DISTAL Application
In the previous chapter, we wrote a complete implementation of the DISTAL system that works as advertised: a user can choose a country, enter a search radius in miles, click on a starting point, and see a high-resolution map showing all the place names within the desired search radius. Unfortunately, the DISTAL application is lacking in a number of areas, and even a cursory look at it will reveal some major problems. In this chapter, we will work on solving these problems. Along the way, we will:
- Learn about the anti-meridian and solve the problems it can cause when working with latitude and longitude-based coordinates
- See how to add a zoom feature to our CGI scripts
- Discover the consequences of working ...
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