Platform
Resources
Pricing
Sign in
Get started
Flavio Gortana
Workspace
Fork
Public
By
Flavio Gortana
Edited
Feb 17, 2023
ISC
Fork of
GeoTIFF Contours
1
Insert cell
Insert cell
chart
=
html
`<svg style="width: 100%; height: auto; display: block;" viewBox="0 0 ${
n
} ${
m
}">
${
Array
.
from
(
contours
(
values
)
,
d
=>
svg
`<path d="${
path
(
d
)
}" fill="${
color
(
d
.
value
)
}" />`
)
}
</svg>`
Insert cell
Insert cell
projected
=
d3GeoProjection
.
geoProject
(
geojson
,
d3
.
geoIdentity
(
)
.
scale
(
[
-
0.5
]
)
)
Insert cell
geojson
=
(
{
type
:
"FeatureCollection"
,
features
:
contours
(
values
)
.
map
(
(
f
)
=>
(
{
type
:
"Feature"
,
properties
:
{
value
:
f
.
value
}
,
geometry
:
f
,
}
)
)
,
}
)
Insert cell
contours
=
d3
.
contours
(
)
.
size
(
[
n
,
m
]
)
.
smooth
(
false
)
.
thresholds
(
20
)
Insert cell
color
=
d3
.
scaleSequential
(
d3
.
extent
(
values
)
,
d3
.
interpolateMagma
)
Insert cell
image
=
tiff
.
getImage
(
)
Insert cell
values
=
(
await
image
.
readRasters
(
)
)
[
0
]
.
map
(
v
=>
v
===
255
?
null
:
v
)
Insert cell
n
=
image
.
getWidth
(
)
Insert cell
m
=
image
.
getHeight
(
)
Insert cell
tiff
=
FileAttachment
(
"all_median_median_0.0.tif"
)
.
arrayBuffer
(
)
.
then
(
buffer
=>
GeoTIFF
.
fromArrayBuffer
(
buffer
)
)
Insert cell
GeoTIFF
=
require
(
"geotiff@1.0.0-beta.13"
)
Insert cell
d3GeoProjection
=
require
(
"d3-geo-projection"
)
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
chart
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
path
Edit
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
projected
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
geojson
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
contours
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
color
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
image
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
values
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
n
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
m
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
tiff
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
GeoTIFF
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML
d3GeoProjection
Add comment
Copy import
Select
Duplicate
Copy link
Embed
Delete
JavaScript
Markdown
HTML