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Brandon Liu
working on protomaps.com
Workspace
Fork
Published
By
Brandon Liu
Edited
Aug 7, 2021
Fork of
GeoJSON Viewer
1
Insert cell
Insert cell
Insert cell
data
=
rewind
(
raw_data
,
true
)
Insert cell
{
const
div
=
document
.
createElement
(
"div"
)
div
.
style
.
height
=
height
+
"px"
div
.
appendChild
(
context
.
canvas
)
context
.
canvas
.
style
.
position
=
"absolute"
div
.
appendChild
(
map
)
map
.
style
.
position
=
"absolute"
return
div
}
Insert cell
map
=
html
`<svg viewBox="0 0 ${
width
} ${
height
}">
<path d="${
path
(
data
)
}" fill="steelblue" stroke="black" opacity="0.5"></path>
</svg>`
Insert cell
context
=
makeContext
(
projection
,
{
data
,
width
,
height
}
)
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import
{
protomaps
,
makeContext
}
from
"@bdon/canvas2d-basemap"
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projection
=
d3
.
geoMercator
(
)
.
fitWidth
(
width
,
data
)
Insert cell
path
=
d3
.
geoPath
(
projection
)
Insert cell
width
=
954
Insert cell
height
=
Math
.
ceil
(
path
.
bounds
(
data
)
[
1
]
[
1
]
)
Insert cell
d3
=
require
(
"d3-geo@1"
)
Insert cell
import
{
jsonInput
}
from
"@mbostock/file-input"
Insert cell
rewind
=
rewind_lib
.
default
Insert cell
rewind_lib
=
import
(
"https://cdn.skypack.dev/@mapbox/geojson-rewind"
)
Insert cell
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map
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projection
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path
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width
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rewind
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rewind_lib
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