Platform
Resources
Pricing
Sign in
Get started
Stuart Thompson
NYT reporter
Workspace
Fork
Public
By
Stuart Thompson
Edited
Nov 6, 2023
ISC
Fork of
D3 U.S. map
1
Insert cell
Insert cell
map
=
htl
.
html
`<svg viewBox="0 0 975 610">
<g fill="none" stroke="#000" stroke-linejoin="round" stroke-linecap="round">
<path stroke-width="0.5" d="${
path
(
states
)
}"></path>
<path d="${
path
(
nation
)
}"></path>
${
dots
}
</g>
</svg>`
Insert cell
path
=
d3
.
geoPath
(
)
Insert cell
dots
=
{
let
ret
=
''
for
(
var
d
of
[
0
,
1
]
)
{
ret
+=
'<g transform="translate(50,50)"><circle r="10" fill="red"></circle></g>'
}
return
ret
}
Insert cell
states
=
topojson
.
mesh
(
us
,
us
.
objects
.
states
,
(
a
,
b
)
=>
a
!==
b
)
Insert cell
nation
=
topojson
.
feature
(
us
,
us
.
objects
.
nation
)
Insert cell
// counties = topojson.mesh(us, us.objects.counties, (a, b) => a !== b && (a.id / 1000 | 0) === (b.id / 1000 | 0))
Insert cell
us
=
FileAttachment
(
"counties-albers-10m.json"
)
.
json
(
)
// Already projected to Albers-USA!
Insert cell
d3
=
require
(
"d3-geo@3"
)
Insert cell
Insert cell
projection
=
d3
.
geoAlbersUsa
(
)
.
scale
(
1300
)
.
translate
(
[
487.5
,
305
]
)
Insert cell
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
Try it for free
Learn more
Compare fork
Fork
View
Export
Edit
Add comment
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
map
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
path
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
dots
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
states
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
nation
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
Add comment
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
us
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
d3
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
Edit
Add comment
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
projection
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML