dear sir, could you please show more explanation about how did you create the pie chart legend for the slope+aspect? and how it is presented in the final map layout, please, if possible? Is it possible to do it in ArcGIS? is there any reference for that? I am really interested to use it for a project. Very best
Jamie Waller sorry I meant to provide this ages ago but got distracted. I coded it in R, so I’ll see if I can share my script. When I do I’ll put it in the description. Thanks
Great video! I found this to be a very useful guide. When I convert my hillshade into a slope (expressed as a percentage) the results range from 0 to 1890. Can you tell me what these values mean? It can't mean a slope of 1890%, can it? Thanks very much!
Thanks Emma. Couple of possible issues - The elevation model you are using (i.e. the DEM); is the coordinate reference system (CRS) unit in degrees or metres? It needs to be the latter (check by right clicking on layer then Properties>Information). If its in degrees you simply save a new copy of the DEM and pick a CRS that has meters as its unit (e.g WGS84 - Pseudo Mercator). Then continue your analysis with this new layer. There are probably more appropriate CRS for your area of interest so either google it or keep an eye on the little red map in QGIS which shows you the geographical area for which a CRS is valid. - Are you converting your hillshade to slope or your original DEM/elevation model to slope? It should be the latter. -Otherwise maybe check the properties of the slope layer you created (Layer properties>Information) and check the minimum and maximum values here (should be between 0 - 90 degrees or 0 - 100%). If the min-max looks OK then just readjust the values to match in the symbology. I don't think this is your case but worth a look anyways. Let me know how you go, Cheers, James
@@spatial-exploration1478 Thanks for your response! It was just the trick. I was converting directing from hillshade to slope (not from the original DEM). Do you teach this material, or just work with the software? Looking forward to seeing more of your videos on QGIS!
dear sir, could you please show more explanation about how did you create the pie chart legend for the slope+aspect? and how it is presented in the final map layout, please, if possible?
Is it possible to do it in ArcGIS?
is there any reference for that?
I am really interested to use it for a project. Very best
Thank you for the great video!
It helped A LOT!
These are great videos- many thanks for creating!
Thanks Gordon, I really appreciate the feedback. Certainly makes the effort that bit more worthwhile.
would you be able to do a tutorial showing how you made the pie chart at the end?
Jamie Waller sorry I meant to provide this ages ago but got distracted. I coded it in R, so I’ll see if I can share my script. When I do I’ll put it in the description. Thanks
Is there any chance of getting that style file?
Interesting
Great video! I found this to be a very useful guide. When I convert my hillshade into a slope (expressed as a percentage) the results range from 0 to 1890. Can you tell me what these values mean? It can't mean a slope of 1890%, can it? Thanks very much!
Thanks Emma. Couple of possible issues
- The elevation model you are using (i.e. the DEM); is the coordinate reference system (CRS) unit in degrees or metres? It needs to be the latter (check by right clicking on layer then Properties>Information). If its in degrees you simply save a new copy of the DEM and pick a CRS that has meters as its unit (e.g WGS84 - Pseudo Mercator). Then continue your analysis with this new layer. There are probably more appropriate CRS for your area of interest so either google it or keep an eye on the little red map in QGIS which shows you the geographical area for which a CRS is valid.
- Are you converting your hillshade to slope or your original DEM/elevation model to slope? It should be the latter.
-Otherwise maybe check the properties of the slope layer you created (Layer properties>Information) and check the minimum and maximum values here (should be between 0 - 90 degrees or 0 - 100%). If the min-max looks OK then just readjust the values to match in the symbology. I don't think this is your case but worth a look anyways.
Let me know how you go,
Cheers,
James
@@spatial-exploration1478 Thanks for your response! It was just the trick. I was converting directing from hillshade to slope (not from the original DEM). Do you teach this material, or just work with the software? Looking forward to seeing more of your videos on QGIS!
Great to hear that @@emmaposluns1238. Will have a few new videos coming soon.