Join Gordon Luckett for an in-depth discussion in this video Creating a heatmap from points, part of Learning QGIS.
- A heatmap is a way to show the intensity…of points over an area.…It's a way of making sense of a large amount…of points within that area.…Let's add points to our map so that we…can create a heatmap with them.…Under layer, choose Add Layer,…Add Delimited Text Layer.…We'll browse through the incidents of crime CSV file…under Data, CSV.…Click Open.…For the X field, make sure you pick long.…And for the Y field, pick lat, and click OK.…Choose WGS 84 or the EPSG4326 as…according to system, which is lat long, and hit OK.…
We now have points on our map.…Let's add the Road_Centerlines for context.…The first way of creating heatmaps…is to style the incidents themselves.…So we double click on incidents…and pick on Style.…We can change the Single Symbol to a Heatmap type.…We'll leave the radius to 10…but change the range of colors to Reds…and click OK.…Now, our incidents of crime are showing…as dark red circles that dynamically change…as we zoom in and out.…
If the underlying data changes,…so too does the heatmap change.…Now a more static way of creating a heatmap…
Author
Gordon Luckett
Released
8/29/2015- Installing QGIS
- Working with vector and raster data
- Styling data with layers
- Labeling data
- Adding maps and elements
- Creating new data
- Using plugins
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 a heatmap from points