Slope, Aspect, and Curvature

[@vitorribeirosa]

Neat!!!
THanks Thomas!!!
Amazing content. You saved my Friday!!!
Cheers!!!

[@NestorAgamez]

Amazing explanation, thank you!!

[@gardeningtourfamilycelebra8268]

Sir, it is very helpful tutorial. Sir, my humble request prepare a video on - Terrain Ruggedness Index (TRI) and Vector Ruggedness Measurement (VRM)

[@carltaljaard]

Hi, I hope you can help me. I am trying to Display the slope in percent rise, but if I run the tool set on percent it just gives the exact same answers or values as degrees. What am I doing wrong?

[@sandeoliveira1794]

Hi, I am from Brazil and I am interested in this subject, but your video is unfocused. I want know how you got this results for curvature. Can You explain me how you got it?

[@DodemMahapat]

HOW IN QGIS? HOW TO DO IT?

[@gp5manash]

Hi Thomas. If it is WGS_1984, then what Z factor am I supposed to use?

[@thomaspingel]

There's a table here: blogs.esri.com/esri/arcgis/2007/06/12/setting-the-z-factor-parameter-correctly. As long as you get it pretty close, it'll come out fine.

[@kouamepascalvictorkoffi7331]

Merci pour l'orientation. mais j'ai besoin d'aide. je me retrouve avec les resultats des pentes de plus de 800% lorsque je lance ma requête sur arcgis. S'il vous plait besoin d'aide.

[@thomaspingel]

Perhaps your vertical and horizontal units are not the same. While 800% slopes are possible, they should be very very rare. Make sure your data is either projected into a local coordinate system like UTM or that you're using the new "geodetic" method of calculation.

[@kubahlemon]

Hi, Sir.
Thank you for your explanation. I actually have a question about curvature value.
How do we determined which one is concave convex etc if my value are more then 1000? Because when I search from many source the value are in average range -1 to 1 or -0,05 to 0,05.
My DEM coordinate already the same with my location. Is it have something to do with my Z factor?
Hope you can help me🙏🏻
Thank you, sir.
Regards,
Putri

[@thomaspingel]

It could well be the Z factor, but also ESRI multiplies the curvature values they calculate by 100x to make the numbers more relatable. webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=How%20Curvature%20works

[@kubahlemon]

@@thomaspingel Ah, I think I get it, Sir. Thank you so much for your information.

[@rahmatkswr]

Hii, you can tell me literature about curvature? Thank you so much for your tutorial 🙏🏻

[@thomaspingel]

This is a fairly technical paper, but it's also quite comprehensive: doi.org/10.1016/j.earscirev.2020.103414