PostGIS in Action: (ed. #1) Chapter 2 - Geometry Types

• PostGIS geometry_columns meta-table
• Geometry types: points, linestrings, polygons
• Geometry Collection types
• Curved geometry types and 3D geometry types

In the first chapter, we gave you a brief taste of what PostGIS is and what are the basic geometries it supports. In this chapter we'll demonstrate how to create these geometries using Well-Known-Text (WKT) representations. We'll also delve into concepts such as polygon validity and linestring simplicity.

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