PostGIS in Action (Paperback)

Regina Obe, Leo Hsu

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商品描述

Whether you're canvassing a congressional district, managing a sales region, mapping city bus schedules, or analyzing local cancer rates, thinking spatially opens up limitless possibilities for database users. PostGIS, a freely available open-source spatial database extender, can help you answer questions that you could not answer using a mere relational database. Its feature set equals or surpasses proprietary alternatives, allowing you to create location-aware queries and features with just a few lines of SQL code.

PostGIS in Action is the first book devoted entirely to PostGIS. It will help both new and experienced users write spatial queries to solve real-world problems. For those with experience in more traditional relational databases, this book provides a background in vector-based GIS so you can quickly move to analyzing, viewing, and mapping data. Advanced users will learn how to optimize queries for maximum speed, simplify geometries for greater efficiency, and create custom functions suited specifically to their applications. It also discusses the new features available in PostgreSQL 8.4 and provides tutorials on using additional open source GIS tools in conjunction with PostGIS.

商品描述(中文翻譯)

無論您是在選區進行選民調查、管理銷售區域、規劃城市公車班次,還是分析當地的癌症發病率,空間思維都為資料庫使用者打開了無限的可能性。PostGIS是一個免費的開源空間資料庫擴充套件,可以幫助您回答那些僅僅使用關聯式資料庫無法回答的問題。它的功能集等同或超越了專有的替代方案,讓您只需幾行SQL代碼就能創建具有位置感知能力的查詢和功能。

《PostGIS in Action》是第一本完全專注於PostGIS的書籍。它將幫助新手和有經驗的使用者撰寫空間查詢以解決現實世界的問題。對於那些在傳統關聯式資料庫方面有經驗的使用者,本書提供了基於向量的地理資訊系統(GIS)的背景知識,讓您能夠快速進行數據分析、查看和地圖繪製。高級使用者將學習如何優化查詢以達到最大速度,簡化幾何圖形以提高效率,並創建特定應用程序所需的自定義函數。本書還討論了PostgreSQL 8.4中提供的新功能,並提供了使用其他開源GIS工具與PostGIS結合使用的教程。