Georeferencing a scanned map and digitizing vectors in QGIS3

[@nebeldark]

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

[@moseskolleh]

Many thanks for such an awesome videos. Really helpful

[@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

[@simbarashethondhlana8327]

Very helpful tutorial. Many thanks.

[@nikhilaugustine1585]

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

[@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 th-cam.com/video/LYRk0eQGS54/w-d-xo.html

[@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.

[@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

[@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: th-cam.com/video/aTYHpft1gus/w-d-xo.html

[@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: th-cam.com/video/67j_HShwv8Y/w-d-xo.html. Or use ground control points collected in the field using a (D)GPS.