Sometimes, it is necessary to make conversions among point, line, and polygon vector geometries. For example, you may need to generate point centroids from zip code polygons or a town boundary polygon from a line layer. Such conversions may be necessary to put the data into the most appropriate geometry for analysis. For example, if you need to determine the acreage of parcels, but they are provided in a line format, you will need to convert them to polygons to calculate their areas. Sometimes, you may want to convert geometries for cartographic reasons, such as converting polygons to points to create label points. The following tools can be found on the Geometry Tools menu under Vector:
Mastering QGIS
Mastering QGIS
Overview of this book
Table of Contents (18 chapters)
Mastering QGIS
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
A Refreshing Look at QGIS
Creating Spatial Databases
Styling Raster and Vector Data
Preparing Vector Data for Processing
Preparing Raster Data for Processing
Advanced Data Creation and Editing
The Processing Toolbox
Automating Workflows with the Graphical Modeler
Creating QGIS Plugins with PyQGIS and Problem Solving
PyQGIS Scripting
Index
Customer Reviews