The application layer here generally refers to the application and data
processing at the server level. It generally consists of a map server, a
database server, and a business logic server. Map servers are commonly found on
Google and Baidu in China. Of course, there is also support for others, but in
the past, the two were mainstream. Google's interface and functions are very
powerful, suitable for later expansion and various scenarios. Baidu is a rising
star with independent data sources, clear maps, support for 3D maps, and a good
domestic experience with fast map loading speed. Many websites also support many
third-party maps, but I personally don't think it's necessary. If you want to
achieve the ultimate in any platform and meet the needs and experiences of
users, it's enough. The focus is on the application and user experience, and no
user will have to switch back and forth between maps and play. Google Maps has
multiple calling methods, but Flex has been largely abandoned after the Google
3.0 API, and its experience is far inferior to that of JavaScript
implementation.
Most databases are based on MySQL. Of course, individual websites may also
choose other databases for security, technical support, and other reasons. The
application server is mainly based on Java, and the front-end interaction is
mainly based on JSP. The backend socket data receiving part can be used with
universal NIO+Hibernate. You can also choose more efficient autonomous server
programs yourself. The entire backend is the key and core of the system, and a
well-designed server architecture determines the functionality and user
experience of the entire system.
Mobile applications are also an important part of the application layer,
mainly composed of various mobile application software, smartphones, PADs, etc.,
to achieve real-time data sharing and analysis.
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