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Mastering Geospatial Analysis with Python
book

Mastering Geospatial Analysis with Python

by Silas Toms, Paul Crickard, Eric van Rees
April 2018
Beginner to intermediate content levelBeginner to intermediate
440 pages
11h 36m
English
Packt Publishing
Content preview from Mastering Geospatial Analysis with Python

Editing features from an existing layer

You can now add and delete features, but sometimes you only need to change an attribute value. For example, an open case status to a closed case status. In this section, you will learn how to modify attributes.

Attributes are modified by calling changeAttributeValues(). The following code changes a single feature:

scf.dataProvider().changeAttributeValues({114:{0:123,1:345,2:"ADA",3:"NEW"} })

The previous code calls changeAttributeValues() and passes a dictionary with the key being the feature id and the value being a dictionary of attributes—{id:{0:value, 1:value, n:value}}. The keys for the attributes dictionary are the field indexes. There are four fields in the features so the dictionary of attributes ...

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Publisher Resources

ISBN: 9781788293334Supplemental Content