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Follow along here: maptime.io/chicago/qgis-101
Tomorrow: Iron Sheep
6:30pm @ TechNexus
What is QGIS?
Free and Open Source GIS Softwarerahber.net
Official Project of OSGEO
Runs on Linux, Unix, Mac OSX, Windows, and Android(!)
Fully capable, supports vector (points, lines, polygons) and raster
Licensed under the
GNU General Public License
Components of QGIS
QGIS Web Client
QGIS for Android (beta)
Mobile! Try if you dare!
Lets make maps! Download:
View -> Toolbars
We're going to run through the process of adding data real quick, then you'll be set loose to make your #ratmap
Will default to the projection set in your project, if none WGS84
Layers -> Individual basis
Project -> Project Properties
Reprojecting a Dataset:
Right Click on Layer -> Save As
Note on editing: QGIS is really best for editing shapefiles. There are plugins for other formats, but keep this in mind when you're out there in the wild.
Try Points in Polygon
Calculate the Neighborhoods with the most Rat Violations
If you have problems, take a look at your layers' CRS. For best results, make sure all of the layers you're processing have the same CRS!
To the Print Composer
Maps are composed in QGIS using the Print Composer
Layout your map presentation in Print Composer.
Maps, Legend, Scale, North Arrow, etc.
You can save it and return to it, and update it!
Other QGIS Features:
One of the neatest features of QGIS
Tons of Open Source Plugins
Plugins -> Plug In Manager
More QGIS in the Future
This is only the beginning.
But for now...