How do I access a RasterStack's dimensions?

[tomchor]

This is a bit of a silly question, but consider the raster stack below:

julia> rstack
RasterStack with dimensions: 
  Dim{:zC} Sampled{Float32} Float32[-145.75601, -137.82991, …, -2.604186, -0.86806154] ForwardOrdered Irregular Points,
  Dim{:zF} Sampled{Float32} Float32[-150.0, -141.51202, …, -1.7361231, 0.0] ForwardOrdered Irregular Points,
  Dim{:xC} Sampled{Float32} Float32[-196.42857, -189.28572, …, 189.28572, 196.42857] ForwardOrdered Regular Points,
  Dim{:yF} Sampled{Float32} Float32[-200.0] ForwardOrdered Regular Points,
  Dim{:xF} Sampled{Float32} Float32[-200.0, -192.85715, …, 185.71428, 192.85715] ForwardOrdered Regular Points,
  Dim{:yC} Sampled{Float32} Float32[-196.42857] ForwardOrdered Regular Points,
  Ti Sampled{Float64} Float64[0.0, 446.5529199252885, …, 133519.3230576612, 133965.8759775865] ForwardOrdered Irregular Points
and 13 layers:
  :dbdz Union{Missing, Float32} dims: Dim{:xC}, Dim{:yC}, Dim{:zF}, Ti (56×1×65×306)
  :b    Union{Missing, Float32} dims: Dim{:xC}, Dim{:yC}, Dim{:zC}, Ti (56×1×64×306)
...

I'd like to access one of its dimensions, say, yC. The only way I figured out how to that was by doing

julia> dims(rstack)[6]
Dim{:yC} Sampled{Float32} ForwardOrdered Regular Points
wrapping: 1-element Vector{Float32}:
 -196.42857

which requires me to search for the position of yC in advance. The other "intuitive" ways that I could think of don't seem to work (like rstack.yC or rstack[:yC]).

Is there a better way?

Thanks!

[rafaqz]

A few ways:

dims(rstack, 6)
dims(rstack, :yC)
dims(rstack, Dim{:yC}())

For multiple:

dims(rstack, (6, 7))
dims(rstack, (:zC, :yC))

You get the order you specify.

Read the DimensionalData.jl docs to understand this stuff more. Rasters simply extends DD for raster arrays.

The other things you are trying are for getting raster layers, not dimensions. It has to be one or the other.

[tomchor]

Thanks! I looked for that in the docs over there but I guess I missed it... sorry

[rafaqz]

They can probably be improved... if you ever have time to fix anything missing docs PRs are appreciated