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Geospatial Analysis with SQL

You're reading from   Geospatial Analysis with SQL A hands-on guide to performing geospatial analysis by unlocking the syntax of spatial SQL

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Product type Paperback
Published in Oct 2023
Publisher Packt
ISBN-13 9781835083147
Length 234 pages
Edition 1st Edition
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Author (1):
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Bonny P McClain Bonny P McClain
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Bonny P McClain
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Table of Contents (13) Chapters Close

Preface 1. Section 1: Getting Started with Geospatial Analytics
2. Chapter 1: Introducing the Fundamentals of Geospatial Analytics FREE CHAPTER 3. Chapter 2: Conceptual Framework for SQL Spatial Data Science – Geometry Versus Geography 4. Chapter 3: Analyzing and Understanding Spatial Algorithms 5. Chapter 4: An Overview of Spatial Statistics 6. Section 2: SQL for Spatial Analytics
7. Chapter 5: Using SQL Functions – Spatial and Non-Spatial 8. Chapter 6: Building SQL Queries Visually in a Graphical Query Builder 9. Chapter 7: Exploring PostGIS for Geographic Analysis 10. Chapter 8: Integrating SQL with QGIS 11. Index 12. Other Books You May Enjoy

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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