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QGIS Python Programming Cookbook, Second Edition

You're reading from   QGIS Python Programming Cookbook, Second Edition Automating geospatial development

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781787124837
Length 464 pages
Edition 2nd Edition
Languages
Tools
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Author (1):
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Joel Lawhead Joel Lawhead
Author Profile Icon Joel Lawhead
Joel Lawhead
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Table of Contents (10) Chapters Close

Preface 1. Automating QGIS FREE CHAPTER 2. Querying Vector Data 3. Editing Vector Data 4. Using Raster Data 5. Creating Dynamic Maps 6. Composing Static Maps 7. Interacting with the User 8. QGIS Workflows 9. Other Tips and Tricks

Creating HTML labels in QGIS

QGIS map tips allow you to hover the mouse cursor over a feature to create a popup that displays information. This information is normally a data field, but you can also display other types of information using a subset of HTML tags. In this recipe, we'll create an HTML map tip that displays a Google Street View image at the feature's location.

Getting ready

In your qgis_data directory, create a directory named tmp.

You will also need to download the following zipped shapefile and place it in your qgis_data/nyc directory:

https://github.com/GeospatialPython/Learn/raw/master/NYC_MUSEUMS_GEO.zip

How to do it...

We will create a function to process the Google data and register it as a QGIS function. Then, we'll load the layer and set its map-tip display field:

  1. First, we need to import the Python libraries we'll need:
            from qgis.utils import qgsfunction 
            from qgis.core import QGis 
            import urllib 
            import os 
    
  2. Next, we&apos...
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