Log4Classicning

原文：
http://apb.directionsmag.com/archives/3792-Spatial-Database-for-Android.html

McObject is offering the Android-ready Perst, a very compact embedded database that includes "R-tree indexes for spatially-oriented applications such as GIS and navigation." Further: "The Perst API is flexible, easy-to-use and very fast compared to alternative commercial Java OODBMSs. "

The database and a demo app, along with the same thing implemented in SQLite (which comes with Android) are avaialble with full source code for download. To be clear, there's an open source license to try, develop and distribute non-commercial apps (free) and a commercial license for commercial apps ($$$).

I can't say I've ever heard of the company or database, the company's other offering, eXtremeDB, is embedded in many mobile and communications devices.

不知什么时候开始我发现SQLite非常火，甚至和SQLite相似的这种轻量级数据库Derby、HSQL在实际应用中的地位也越来越重要，不再仅仅是所谓玩具了。SQLite现在和标准的Python环境一起发行，后来还添加了对空间数据的支持，ogr这个GIS库也立刻跟进提供了对SQLite空间数据的读写支持。如今Android也捆绑了SQLite，看来这个轻量级数据库上是要有一番好戏看了。

SQLite简介：
SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.

SQLite is the most widely deployed SQL database engine in the world. It is used in countless desktop computer applications as well as consumer electronic devices including cellphones, PDAs, and MP3 players. The source code for SQLite is in the public domain.