Georeferencing a scanned map and digitizing vectors in QGIS3

This video shows how to georeference a scanned map and to use it as a backdrop for digitizing points, lines and polygon vectors. The vector layers are stored in a GeoPackage, including their styles.
This video is part of IHE Delft OpenCourseWare. More free resources can be found at www.gisopencourseware.org
For an overview of our GIS courses and info on tailor made trainings and advise see our folder: www.un-ihe.org/sites/default/...
More information about the book "QGIS for Hydrological Applications - Recipes for Catchment Hydrology and Water Management" by Kurt Menke and Hans van der Kwast can be found at the website of Locate Press: www.locatepress.com/hyd
IHE Delft and Nieuwland Geoinformatie offer an online course. It includes support from experienced trainers and you'll get the official QGIS certificate after completion. More info at: www.learning-gis.com
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[@nebeldark]

Thanks! All ypur tutorials have been really helpful! :) Cheers from México

[@yengyangnaotou9590]

Thank you very much Hans van der Kwast ! your video help me a lot !

[@perlarivadeneyra9190]

Thank you so much for the excellent explanation, it was super helpful!

[@rajendrarijalgis2946]

Great tutorial on Geo-referencing! Thanks

[@moseskolleh]

Many thanks for such an awesome videos. Really helpful

[@simbarashethondhlana8327]

Very helpful tutorial. Many thanks.

[@nikhilaugustine1585]

Great explanation. Make more videos ❤. I am looking for to it.

[@prabhuabhisekpanda6386]

Hi sir, Hope You, your family and loved ones are well and healthy during this PANDEMIC. Sir would you please give me the procedures that how to calculate VOLUME/RUNOFF water for a besin through railfall data? Thank you. Prabhu from INDIA.

[@HansvanderKwast]

You can use r.watershed from GRASS which is available in the Processing Toolbox. For the input "Amount of overland flow per cell" you can use a precipitation raster layer. If omitted it will use a unit of 1 and the will be Number of cells that drain to each cell. Here's a video that shows flow accumulation: kzbin.info/www/bejne/l4W8eaOcqZaaq9U

[@yuksporr]

Thank you for this video! It's great! Is there a way to digitize elevation contour lines in QGIS?

[@HansvanderKwast]

You can digitize the contout lines manually from a scanned map. Here's a video on digitizing lines kzbin.info/www/bejne/goq1nGObhqyGa5Y

[@lalalalili1989]

@@HansvanderKwast Hi Sir, thank you for the awesome videos. Is it possible to assign elevations to the digitized contour lines?

[@HansvanderKwast]

@@lalalalili1989 You have to add an attribute for the elevation value.

[@ifatcohen5769]

HI, I need to load a JPEG that doesn't have coordinates (like a satellite pic), how can I place it geographically in the right place?

[@HansvanderKwast]

Hi. Then you need use the image to image georeferencing explained in this video: kzbin.info/www/bejne/bGjNkHuJndypbrs. Or use ground control points collected in the field using a (D)GPS.

[@patriciamachado1873]

Hi! Is there a way to still access these files? I found these materials to be extremely useful! (thank you and congrats on that). But the source website appears not to be available anymore.

[@HansvanderKwast]

I think you can find the course data still here: courses.gisopencourseware.org/course/view.php?id=4

[@patriciamachado1873]

@@HansvanderKwast amazing!! thanks a million