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Geospatial Analysis with SQL

Geospatial Analysis with SQL

By : Bonny P McClain
4.7 (14)
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Geospatial Analysis with SQL

Geospatial Analysis with SQL

4.7 (14)
By: Bonny P McClain

Overview of this book

Geospatial analysis is industry agnostic and a powerful tool for answering location questions. Combined with the power of SQL, developers and analysts worldwide rely on database integration to solve real-world spatial problems. This book introduces skills to help you detect and quantify patterns in datasets through data exploration, visualization, data engineering, and the application of analysis and spatial techniques. You will begin by exploring the fundamentals of geospatial analysis where you’ll learn about the importance of geospatial analysis and how location information enhances data exploration. Walter Tobler’s second law of geography states, “the phenomenon external to a geographic area of interest affects what goes on inside.” This quote will be the framework of the geospatial questions we will explore. You’ll then observe the framework of geospatial analysis using SQL while learning to create spatial databases and SQL queries and functions. By the end of this book, you will have an expanded toolbox of analytic skills such as PostGIS and QGIS to explore data questions and analysis of spatial information.
Table of Contents (13 chapters)
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Section 1: Getting Started with Geospatial Analytics
6
Section 2: SQL for Spatial Analytics

Exploring pattern detection tools

There is a column in our data that needs a bit of history. It is labeled Prevailing Wage Status and it is derived from the Davis-Bacon Act, requiring building contractors to pay unskilled laborers the prevailing wage, which reduces opportunities for unskilled or low-skilled workers. Prevailing wages reflect the compensation paid to the majority of workers within a certain area and are often described as union wages.

Smaller firms owned by minorities are typically non-unionized and unable to pay these higher wages. The history of the act is tinged with its passage in 1931 to prevent non-unionized black and immigrant workers from working on federally funded construction projects. The modern implications of the act in NYC can be observed in Figure 3.9:

Figure 3.9 – Prevailing wages (red) and non-prevailing wages (white) in NYC

Figure 3.9 – Prevailing wages (red) and non-prevailing wages (white) in NYC

When we analyze the data, we ask questions and notice patterns in our data. After reviewing...

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Geospatial Analysis with SQL
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