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worldmap.jl
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worldmap.jl
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using EasyVega
tx = Signal("width / 2")
ty = Signal("height / 2")
# Projections define how the lat / longitude coordinates should be
# translated 2d coordinates
# see https://vega.github.io/vega/docs/projections/
proj = Projection(
type= "orthographic",
scale= 220,
rotate= [0, 0, 0],
center= [40, 32],
translate= [(signal= tx,), (signal= ty,)]
)
# Graticules are the reference grid for maps
graticule = Data(
transform= [ (type= "graticule", step= [15,15]) ]
)
gratm = ShapeMark(
from_data = graticule,
:strokeWidth => 2,
:stroke => "#ddd",
:fill => nothing,
transform = [ (type="geoshape", projection= proj) ]
)
# pull up a world map from vega example data
world = Data(
url= "https://github.com/raw/vega/vega-datasets/next/data/world-110m.json",
format= (
type= "topojson",
feature= "countries"
)
)
worldm = ShapeMark(
from_data = world,
:strokeWidth => 2,
:stroke => "#999",
:fill => "#efd",
transform = [ (type="geoshape", projection= proj) ]
)
VG(width=300, height=300, background=:white, autosize="none",
marks=[gratm, worldm]
)