Plotting trees with QGIS

[elspedo]

Afternoon,

 

For one of my assignments i'm having to do a site survey, it's only a few trees but I need info on crown size and would like to include RPA too.

 

I'm looking to plot the trees with QGIS (as it's free). I've got my GPX file and can drop them on to a map but is there anyway of using say an excel sheet with crown spread details (N,E,S,W) to get a scaled symbol? I can get it to do a perfectly round circle but obviously no tree was created perfectly round.

 

I've also got Autocad so if there is any easier way of doing it in there I would be interested.

[Island Lescure]

Crown spreads are a problem with QGIS: Create uneven, different diameter ellipse around point in QGIS 2.10 - Geographic Information Systems Stack Exchange

[elspedo]

Thanks for the fast reply, i'll have a crack at it in AutoCAD then!

[Paul Barton]

The way I did it manually in Autocad (before buying a purpose built program) was to draw a cross with the N,E,S,W dimensions and then use a 'spline' to connect them.

[10 Bears]

Purely from memory as I've not used my CAD in a while, you can use the inbuilt shapes ie circle, to draw out your crown edge, right click and write in the exact radius you want to use and the crown edge/circle will be drawn to the exact size.

 

It works the same with the ellipse option but instead you enter 2 axis. This approach is fine if you are only plotting a few trees as you state.

[elspedo]

Ye this is only for five trees, i've used QGIS when plotting hundreds of trees when crown spread wasn't important as it's just a case of dragging my GPX file in.

 

I have found this plugin which I think will do what I want though:

 

https://plugins.qgis.org/plugins/ArcheoCAD/

 

There is also:

 

QGIS Python Plugins Repository

 

But i've not tried that yet.

[Island Lescure]

Ye this is only for five trees, i've used QGIS when plotting hundreds of trees when crown spread wasn't important as it's just a case of dragging my GPX file in.

 

I have found this plugin which I think will do what I want though:

 

https://plugins.qgis.org/plugins/ArcheoCAD/

 

There is also:

 

QGIS Python Plugins Repository

 

But i've not tried that yet.

 

Please let me know if that works. I would be interested as I have only worked with QGIS so far.

 

Cheers!