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Python Geospatial Development - Second Edition by Erik Westra

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Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: " The pyproj Geod class allows you to perform various geodetic calculations based on points on the Earth's surface."

A block of code is set as follows:

import mapnik

symbolizer = mapnik.PolygonSymbolizer(
                        mapnik.Color("darkgreen"))

rule = mapnik.Rule()
rule.symbols.append(symbolizer)

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

 import mapnik

symbolizer = mapnik.PolygonSymbolizer(
                        mapnik.Color("darkgreen"))
rule = mapnik.Rule() rule.symbols.append(symbolizer) ...

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