QGIS 3 Lesson 2 Using slope analysis tools for rasters in qgis

Data available at www.dmad.org.tr/qgis-3-lesson-2
Hi and welcome to Lesson 2 in DMAD - Marine Mammals Research Association's third free QGIS course. This course is for intermediate users and assumes previous knowledge. If you're new to GIS or haven't used it for a while then I suggest flicking through a few of our previous lessons. In today's lesson we're going to use slope analysis to look at the steepest part of our raster.

[@heinrichhechter7560]

You have been instrumental to my PhD work, your guidance has been extremely helpful. God bless you.

[@aminmedoudi2383]

Thanks it's useful

[@luciacaldas4587]

Thank you very much, it's very interesting! I wonder why the lake at the southwest area is white on the slope analysis, does it only reflect the slopes on land or is there another reason for this?

[@dmadmarinemammalsresearcha3966]

Hi Lucía, the area of white in the south west is actually Boka Kotorska Bay and so it part of the sea so the white is just the background of QGIS

[@luciacaldas4587]

@@dmadmarinemammalsresearcha3966 thank you for the reply! I actually meant the Skadar Lake area (which is the SouthEast, I wrote it wrong last week - sorry about the confusion) which does show in the "MNE_UTM34" layer under the slope analysis. Thank you!

[@dmadmarinemammalsresearcha3966]

Hi Lucía, no problems! The lake itself appears black (flat) because the lidar data just reflects of the surface and is not a true 'land' value. There is a thin (and quite unusual) range of mountains that runs just south of the lake which is white. Could this be it?

[@luciacaldas4587]

@@dmadmarinemammalsresearcha3966 Yes! I see what you mean. So basically I got confused because the lake area is a 0 value and when we set the transparency to get rid of the black area around the map (minute 5:37 in the video) it gets rid of the lake area as well, so you can see the underlying "MNE_UTM34" layer (and if you switch it off it's just white - background colour). But thank you very much for the explanation, it has helped me understand how that happened. Once again, thanks a million for this course, I am enjoying it very much!

[@dmadmarinemammalsresearcha3966]

@@luciacaldas4587 ah I understand! You're extremely welcome 😊