diff --git a/Project.toml b/Project.toml
index 828be12e1..f7130729b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -5,15 +5,11 @@ version = "0.0.1"
 
 [deps]
 ArchGDAL = "c9ce4bd3-c3d5-55b8-8973-c0e20141b8c3"
-DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 Distances = "b4f34e82-e78d-54a5-968a-f98e89d6e8f7"
 Fauxcurrences = "a2d61402-033a-4ca9-aef4-652d70cf7c9c"
 GBIF = "ee291a33-5a6c-5552-a3c8-0f29a1181037"
 GDAL = "add2ef01-049f-52c4-9ee2-e494f65e021a"
-GLMakie = "e9467ef8-e4e7-5192-8a1a-b1aee30e663a"
-GeoMakie = "db073c08-6b98-4ee5-b6a4-5efafb3259c6"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
-Revise = "295af30f-e4ad-537b-8983-00126c2a3abe"
 SimpleSDMDatasets = "2c7d61d0-5c73-410d-85b2-d2e7fbbdcefa"
 SimpleSDMLayers = "2c645270-77db-11e9-22c3-0f302a89c64c"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
diff --git a/docs/Project.toml b/docs/Project.toml
index cf335c8a0..2b72164af 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -1,8 +1,10 @@
 [deps]
 CairoMakie = "13f3f980-e62b-5c42-98c6-ff1f3baf88f0"
+DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 GeoMakie = "db073c08-6b98-4ee5-b6a4-5efafb3259c6"
 InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 Literate = "98b081ad-f1c9-55d3-8b20-4c87d4299306"
+MLJ = "add582a8-e3ab-11e8-2d5e-e98b27df1bc7"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
diff --git a/docs/src/vignettes/09_data_preparation.jl b/docs/src/vignettes/09_data_preparation.jl
new file mode 100644
index 000000000..01753e932
--- /dev/null
+++ b/docs/src/vignettes/09_data_preparation.jl
@@ -0,0 +1,126 @@
+# # Preparing data for prediction
+
+using SpeciesDistributionToolkit
+using CairoMakie
+
+#
+
+spatial_extent = (left = 5.0, bottom = 57.5, right = 10.0, top = 62.7)
+
+#
+
+rangifer = taxon("Rangifer tarandus tarandus"; strict = false)
+query = [
+    "occurrenceStatus" => "PRESENT",
+    "hasCoordinate" => true,
+    "decimalLatitude" => (spatial_extent.bottom, spatial_extent.top),
+    "decimalLongitude" => (spatial_extent.left, spatial_extent.right),
+    "limit" => 300,
+]
+presences = occurrences(rangifer, query...)
+for i in 1:3
+    occurrences!(presences)
+end
+
+#
+
+dataprovider = RasterData(CHELSA1, BioClim)
+
+varnames = layerdescriptions(dataprovider)
+
+#
+
+layers = [
+    convert(
+        SimpleSDMResponse,
+        1.0SimpleSDMPredictor(dataprovider; spatial_extent..., layer = lname),
+    ) for
+    lname in keys(varnames)
+]
+
+#
+
+originallayers = deepcopy(layers)
+
+# 
+
+presenceonly = mask(layers[1], presences, Bool)
+absenceonly = SpeciesDistributionToolkit.sample(
+    pseudoabsencemask(SurfaceRangeEnvelope, presenceonly),
+    250,
+)
+replace!(presenceonly, false => nothing)
+replace!(absenceonly, false => nothing)
+for cell in absenceonly
+    presenceonly[cell.longitude, cell.latitude] = false
+end
+
+for i in eachindex(layers)
+    keys_to_void = setdiff(keys(layers[i]), keys(presenceonly))
+    for k in keys_to_void
+        layers[i][k] = nothing
+    end
+end
+
+layers
+
+#
+
+refs = Ref.([layers..., presenceonly])
+
+datastack = SimpleSDMStack([values(varnames)..., "Presence"], refs)
+
+predictionstack = SimpleSDMStack([values(varnames)...], Ref.(originallayers))
+
+# 
+
+
+using DataFrames
+DataFrame(datastack)
+
+#
+
+using MLJ
+
+# 
+
+y, X = unpack(select(DataFrame(datastack), Not([:longitude, :latitude])), ==(:Presence));
+y = coerce(y, Continuous)
+
+#
+
+Standardizer = @load Standardizer pkg = MLJModels add = true verbosity = 0
+LM = @load LinearRegressor pkg = MLJLinearModels add = true verbosity = 0
+model = Standardizer() |> LM()
+
+#
+
+mach = machine(model, X, y) |> fit!
+
+#
+
+perf_measures = [mcc, f1score, accuracy, balanced_accuracy]
+evaluate!(
+    mach;
+    resampling = CV(; nfolds = 3, shuffle = true, rng = Xoshiro(234)),
+    measure = perf_measures,
+)
+
+#
+
+value = predict(mach, select(DataFrame(predictionstack), Not([:longitude, :latitude])));
+
+#
+
+prediction = select(DataFrame(predictionstack), [:longitude, :latitude]);
+prediction.value = value;
+
+#
+
+output = Tables.materializer(SimpleSDMResponse)(prediction)
+
+# 
+
+heatmap(sprinkle(output)...; colormap = :viridis)
+scatter!(longitudes(presences), latitudes(presences))
+current_figure()
diff --git a/src/SpeciesDistributionToolkit.jl b/src/SpeciesDistributionToolkit.jl
index bb19be4a3..334ec600a 100644
--- a/src/SpeciesDistributionToolkit.jl
+++ b/src/SpeciesDistributionToolkit.jl
@@ -9,6 +9,8 @@ const _distance_function = Distances.Haversine(6371.0)
 
 import StatsBase
 
+import Tables
+
 # We make ample use of re-export
 using Reexport
 
@@ -29,8 +31,11 @@ include("io/geotiff.jl")
 include("io/ascii.jl")
 include("io/read_write.jl")
 
+# Stack for data export
+include("stack.jl")
+export SimpleSDMStack
+
 # Tables interface
-import Tables
 include("tables.jl")
 
 # Functions for pseudo-absence generation
diff --git a/src/stack.jl b/src/stack.jl
new file mode 100644
index 000000000..4b575ae35
--- /dev/null
+++ b/src/stack.jl
@@ -0,0 +1,77 @@
+"""
+    SimpleSDMStack
+
+Stores multiple _references_ to layers alongside with their names. This is mostly useful because it provides an interface that we can use as a Tables.jl provider.
+"""
+struct SimpleSDMStack
+    names::Vector{String}
+    layers::Vector{Base.RefValue}
+    function SimpleSDMStack(names::Vector{String}, layers::Vector{Base.RefValue})
+        # As many names as layers
+        @assert length(names) == length(layers)
+        # Layers have the correct type
+        @assert all([typeof(layer.x) <: SimpleSDMLayer for layer in layers])
+        # Layers are all compatible
+        @assert all([
+            SimpleSDMLayers._layers_are_compatible(first(layers).x, layer.x) for
+            layer in layers
+        ])
+        # Layers all have the same keys
+        @assert all([
+            sort(keys(first(layers).x)) == sort(keys(layer.x)) for layer in layers
+        ])
+        # Return if all pass
+        return new(names, layers)
+    end
+end
+
+Base.length(s::T) where {T <: SimpleSDMStack} = length(first(s.layers).x)
+Base.names(s::T) where {T <: SimpleSDMStack} = s.names
+SimpleSDMLayers.latitudes(s::T) where {T <: SimpleSDMStack} = latitudes(first(s.layers).x)
+SimpleSDMLayers.longitudes(s::T) where {T <: SimpleSDMStack} = longitudes(first(s.layers).x)
+SimpleSDMLayers.boundingbox(s::T) where {T <: SimpleSDMStack} =
+    boundingbox(first(s.layers).x)
+
+Base.IteratorSize(::T) where {T <: SimpleSDMStack} = Base.HasLength()
+function Base.IteratorEltype(s::T) where {T <: SimpleSDMStack}
+    varnames = [:longitude, :latitude, Symbol.(names(s))...]
+    vartypes = [
+        eltype(longitudes(s)),
+        eltype(latitudes(s)),
+        [SimpleSDMLayers._inner_type(l.x) for l in s.layers]...,
+    ]
+    return NamedTuple{tuple(varnames...), Tuple{vartypes...}}
+end
+
+function Base.iterate(s::SimpleSDMStack)
+    position = findfirst(!isnothing, s.layers[1].x.grid)
+    lon = longitudes(s)[last(position.I)]
+    lat = latitudes(s)[first(position.I)]
+    vals = [l.x[lon, lat] for l in s.layers]
+    varnames = [:longitude, :latitude, Symbol.(names(s))...]
+    return (NamedTuple{tuple(varnames...)}(tuple(lon, lat, vals...)), position)
+end
+
+function Base.iterate(s::SimpleSDMStack, state)
+    newstate = LinearIndices(s.layers[1].x.grid)[state] + 1
+    newstate > prod(size(s.layers[1].x.grid)) && return nothing
+    position = findnext(
+        !isnothing,
+        s.layers[1].x.grid,
+        CartesianIndices(s.layers[1].x.grid)[newstate],
+    )
+    isnothing(position) && return nothing
+    lon = longitudes(s)[last(position.I)]
+    lat = latitudes(s)[first(position.I)]
+    vals = [l.x[lon, lat] for l in s.layers]
+    varnames = [:longitude, :latitude, Symbol.(names(s))...]
+    return (NamedTuple{tuple(varnames...)}(tuple(lon, lat, vals...)), position)
+end
+
+Tables.istable(::Type{SimpleSDMStack}) = true
+Tables.rowaccess(::Type{SimpleSDMStack}) = true
+function Tables.schema(s::SimpleSDMStack)
+    tp = first(s)
+    sc = Tables.Schema(keys(tp), typeof.(values(tp)))
+    return sc
+end