Elevation profile plot (Request in QGIS)

qgis-bot commented 2 years ago

Request for documentation

From pull request QGIS/qgis#47990 Author: @nyalldawson QGIS version: 3.26

Elevation profile plot

PR Description:

This PR implements a native elevation profile tool.

Currently supports:

Vector, raster and mesh layers, based on the corresponding layer's elevation settings. (E.g. vector layer profiles will respect terrain clamping settings and extrusion heights). (Point cloud layers will be implemented following this PR)
Drawing profile lines interactively using a map tool which supports snapping, tracing, stream digitizing and curves
Interactive navigation of the plot canvas, using the standard QGIS pan/zoom shortcuts. E.g. middle mouse button = pan, hold space = pan, ctrl + space = zoom, ctrl + mouse wheel = fine zoom
Plots can be exported to PDF (as high quality vector objects, ready for any post-processing in Inkscape etc) or image formats

Some demonstrations:

Setting the profile curve line using a map tool:

https://user-images.githubusercontent.com/1829991/160990369-b166d6b3-3dd9-4c32-bcd1-63d069dbc9c2.mp4

The profile chart style for layers can be set in their corresponding layer properties - elevation tab:

(Fun fact -- because these are rendered using standard QGIS line symbols, you can go really overboard with your profile tool appearance, by using geometry generators, paint effects, etc...!

)

Commits tagged with [need-docs] or [FEATURE]

anitagraser commented 2 years ago

I wonder if it would be worthwhile to include a link to this recent video by @nyalldawson and @timlinux in the docs https://www.youtube.com/watch?v=AknJjNPystU

erentar commented 2 years ago

This absolutely needs to be in the documentation.

jeff-mclean commented 2 years ago

G'day Nyall,

Gotta congratulate you on this plugin. I'm a relative newbie to the gis world. I've been struggling along with the old profile elevation tools on QGIS and had a deuce of a job getting them to work for me. I finally got it, but then 3.26 came along with your plugin, and you smashed it. LOVE the simplicity, and the user-friendliness, and the recording of the presentation you gave was excellent. I rarely watch presos like that, but the bits I saw had you explaining your tool effortlessly. The plugin has honestly made me smile.

Anyway, I was wondering how easy it is to add x and y axis data formatting to the plot. I imagine it might be a bit difficult, but I'd love to convert metres on the x axis to km and show it on the axis. Also things like adding separators and decimal point accuracy. Of course, if that is too difficult, I understand. If you have any thoughts about workarounds, I'd love to hear them.

But looping back, I really appreciate this work you've done. Thanks, from lots of us.

Cheers, Jeff

cefect commented 1 year ago

Thanks for this plugin. Is there something in the pyqgis API that lets me activate a layer as an "elevation surface" (like the above does in the properties GUI)?

agiudiceandrea commented 1 year ago

@felixfeckler when do you plan to add the "Elevation profile" info to the documentation?

qgis / QGIS-Documentation