Skip to content

precompute chunks for RasterDataset #462

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 2 commits into
base: master
Choose a base branch
from
Open

precompute chunks for RasterDataset #462

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
e5760fa
precompute chunks for RasterDataset
rafaqz Feb 9, 2025
e1b8d10
Update src/raster/array.jl
yeesian Feb 10, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
20 changes: 10 additions & 10 deletions src/raster/array.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,10 @@ us to be able to index into it like we would an array.
Constructing a RasterDataset will error if the raster bands do not have all the
same size and a common element data type.
"""
struct RasterDataset{T,DS<:AbstractDataset} <: AbstractDiskArray{T,3}
struct RasterDataset{T,DS<:AbstractDataset,C<:DiskArrays.GridChunks} <: AbstractDiskArray{T,3}
ds::DS
size::Tuple{Int,Int,Int}
chunks::C
end

function RasterDataset(
Expand All @@ -33,7 +34,12 @@ function RasterDataset(
throw(ArgumentError("The Dataset does not contain any raster bands"))
end
s = _common_size(ds)
return RasterDataset{pixeltype(ds),typeof(ds)}(ds, s)
subchunks = DiskArrays.eachchunk(getband(ds, 1))
chunks = DiskArrays.GridChunks(
subchunks.chunks...,
DiskArrays.RegularChunks(1, 0, s[3]),
)
return RasterDataset{pixeltype(ds),typeof(ds),typeof(chunks)}(ds, s, chunks)
end

# Forward a few functions
Expand Down Expand Up @@ -138,14 +144,8 @@ indexing.
readraster(s::String; kwargs...)::RasterDataset =
RasterDataset(read(s; kwargs...))

function DiskArrays.eachchunk(ds::RasterDataset)::DiskArrays.GridChunks
subchunks = DiskArrays.eachchunk(getband(ds, 1))
return DiskArrays.GridChunks(
subchunks.chunks...,
DiskArrays.RegularChunks(1, 0, size(ds, 3)),
)
end

DiskArrays.eachchunk(ds::RasterDataset)::DiskArrays.GridChunks =
ds.chunks
DiskArrays.haschunks(::RasterDataset)::DiskArrays.Chunked = DiskArrays.Chunked()
DiskArrays.haschunks(::AbstractRasterBand)::DiskArrays.Chunked =
DiskArrays.Chunked()
Expand Down
Loading