Join Gordon Luckett for an in-depth discussion in this video Creating centroids from polygons, part of Learning QGIS (2015).
- The geometric center of an object is the centroid.…Centroid points are useful for labeling features…since they usually contain the attributes…of the paired Geometry.…In centroid points, you can move them…for more effective location for labeling.…Let's have the PARCELS shapefile current session.…Next, based on the PARCELS, we're going to create centroids.…So under Vector, Geometry Tools,…choose Polygon Centroids.…The Input polygon vector layer is PARCELS.…The output point shapefile, the Desktop…and we'll call it CENTROIDS.shp.…
Click OK…and close the dialog box.…You see we now have centroids.…If you highlight centroids and pick on Attributes,…you can see that all the attributes are inherited…inside the centroids from the Parcel layer.…So we have all this data to work with for labeling.…We're going to focus on this island on the east side…just across from downtown.…Next, we go into CENTROIDS and work on the style.…
The first thing we're going to do is…we're going to hide the simple marker.…So we're going to set the color to transparent.…
Author
Gordon Luckett
Released
8/29/2015- Explain how to determine if you should install the 32-bit or 64-bit version of QGIS on a Windows 10 machine.
- Write the command that will navigate you to the "Add WFS Layer from a Server" dialog window in QGIS.
- Identify what format WMS typically delivers images in.
- State which layer properties tab allows you to edit the line layers of a shapefile.
- List the labels tab that should be selected to edit the visibility of vector data labels at certain scales.
- Identify what programming language the OpenLayers plugin is written in.
Skill Level Beginner
Duration
Views
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Introduction
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Welcome47s
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1. Understanding and Installing QGIS
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Overview of QGIS features5m 21s
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Installing QGIS1m 30s
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Exploring the QGIS browser3m 43s
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2. Vector Data with QGIS
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Adding shapefiles to QGIS2m 22s
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Adding WFS data to QGIS3m 52s
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3. Raster Data with QGIS
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Adding ECW data3m 51s
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Adding WMS data4m 46s
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Adding DEM data4m 22s
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4. Styling Data
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Working with point layers3m 52s
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Utilizing polyline layers3m 30s
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Exploring polygon layers4m 6s
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Using thematic layers6m 5s
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Working with DEM layers3m 1s
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5. Labeling Features
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Labelling vector data7m 6s
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6. Changing Default Properties
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Exploring project properties8m 46s
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7. Printing with Print Composer
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Adding maps5m
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Adding elements4m 17s
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8. Creating New Data
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Creating new vector data4m 59s
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Adding data from Excel (CSV)2m 50s
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Editing existing data4m 59s
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9. Using Advanced Tools
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10. Using Plugins
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Conclusion
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Next steps38s
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Video: Creating centroids from polygons