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D3 Heatmap uses CANVAS pixel level detail script src https d3js org d3 v7 min js script script src https d3js org d3 hsv v0 1 min js script canvas style width 600px canvas script let jsondata width 29 height 20 values 103 105 106 107 105 104 105 106 107 110 110 109 109 108 107 106 104 104 103 103 101 100 100 97 96 96 95 94 94 105 106 108 109 109 110 110 112 115 116 119 116 112 110 110 108 106 106 105 104 103 102 100 98 96 96 96 95 94 106 108 109 111 114 115 119 130 134 135 135 130 121 116 111 112 110 109 107 106 104 103 101 99 96 96 96 95 94 107 109 110 117 120 129 139 145 150 154 151 143 130 124 120 117 116 113 109 106 104 101 100 99 97 96 96 95 94 108 110 112 120 131 142 152 163 170 175 171 160 149 136 126 123 120 119 111 110 109 109 103 100 97 96 96 96 95 108 111 118 130 140 153 165 177 180 180 179 168 156 139 130 126 125 124 120 120 123 117 108 100 100 96 96 96 95 108 117 129 141 153 165 177 185 180 178 179 173 157 143 135 130 132 131 133 137 136 124 116 109 105 100 97 97 96 110 124 139 148 163 176 187 186 175 169 171 170 160 152 144 137 138 140 140 140 140 131 121 112 108 105 100 99 98 110 127 140 154 171 184 191 183 166 156 155 165 166 161 152 145 146 145 142 140 138 131 123 117 112 110 105 100 99 110 124 142 157 174 187 191 182 164 153 149 161 170 166 159 153 155 150 145 140 136 131 126 120 116 113 107 105 100 108 120 140 158 169 183 193 184 167 158 157 166 176 176 164 160 163 157 148 142 139 135 129 124 119 116 112 110 107 107 118 129 150 165 181 191 189 177 169 169 174 179 179 168 168 170 160 152 149 147 143 136 129 123 118 111 110 109 104 111 123 141 161 179 186 190 185 180 179 177 178 174 166 168 170 162 155 150 150 150 144 134 127 117 107 105 102 101 107 120 136 155 170 178 182 183 180 174 168 164 164 159 160 166 159 155 150 150 150 149 140 129 112 103 101 101 103 106 114 127 150 160 167 172 175 173 164 155 153 150 148 148 150 152 150 150 150 150 149 141 125 108 102 101 100 102 105 109 120 133 147 152 161 164 163 154 147 144 140 141 142 142 142 143 145 146 148 145 140 123 108 105 103 100 102 104 106 113 124 130 136 147 154 151 146 139 132 128 129 131 132 134 136 139 140 139 137 130 124 112 105 101 99 100 103 105 108 117 123 130 139 146 145 138 130 121 120 121 124 125 125 126 127 129 128 128 125 119 108 105 103 101 101 104 107 110 114 121 128 135 140 137 131 120 117 115 117 118 120 121 119 117 118 119 123 122 113 106 103 101 100 101 104 107 110 115 118 126 130 133 129 120 114 112 112 113 115 117 118 115 114 116 117 119 120 112 104 102 100 99 let blob new Blob jsondata type text plain let url URL createObjectURL blob var i0 d3 interpolateHsvLong d3 hsv 120 1 0 65 d3 hsv 60 1 0 90 var i1 d3 interpolateHsvLong d3 hsv 60 1 0 90 d3 hsv 0 0 0 95 var interpolateTerrain function t return t 0 5 i0 t 2 i1 t 0 5 2 var color d3 scaleSequential interpolateTerrain domain 90 190 d3 json url then function volcano console log loaded var n volcano width m volcano height var canvas d3 select canvas attr width n attr height m var context canvas node getContext 2d image context createImageData n m for var j 0 k 0 l 0 j m j for var i 0 i n i k l 4 var c d3 rgb color volcano values k image data l 0 c r image data l 1 c g image data l 2 c b image data l 3 255 context putImageData image 0 0 console log ready script

6 159 155 150 150 150 149 140 129 112 103 101 101 103 106 114 127 150 160 167 172 175 173 164 155 153 150 148 148 150 152 150 150 150 150 149 141 125 108 102 101 100 102 105 109 120 133 147 152 161 164 163 154 147 144 140 141 142 142 142 143 145 146 148 145 140 123 108 105 103 100 102 104 106 113 124 130 136 147 154 151 146 139 132 128 129 131 132 134 136 139 140 139 137 130 124 112 105 101 99 100 103 105 108 117 123 130 139 146 145 138 130 121 120 121 124 125 125 126 127 129 128 128 125 119 108 105 103 101 101 104 107 110 114 121 128 135 140 137 131 120 117 115 117 118 120 121 119 117 118 119 123 122 113 106 103 101 100 101 104 107 110 115 118 126 130 133 129 120 114 112 112 113 115 117 118 115 114 116 117 119 120 112 104 102 100 99 let blob new Blob jsondata type text plain let url URL createObjectURL blob var i0 d3 interpolateHsvLong d3 hsv 120 1 0 65 d3 hsv 60 1 0 90 var i1 d3 interpolateHsvLong d3 hsv 60 1 0 90 d3 hsv 0 0 0 95 var interpolateTerrain function t return t 0 5 i0 t 2 i1 t 0 5 2 var color d3 scaleSequential interpolateTerrain domain 90 190 d3 json url then function volcano console log loaded var n volcano width m volcano height var canvas d3 select canvas attr width n attr height m var context canvas node getContext 2d image context createImageData n m for var j 0 k 0 l 0 j m j for var i 0 i n i k l 4 var c d3 rgb color volcano values k image data l 0 c r image data l 1 c g image data l 2 c b image data l 3 255 context putImageData image 0 0 console log ready script

3dplot
a4print
about
acejs
acejs2
acejs3
aessecurity
angularjs
animbackgroundimage
aseformat
assert
asteroidsjs
backgrounds01
backgrounds02
backgrounds03
barnsleyfern
base26
base64
bib
binary
bodypix
bouncy
box2dweb
breakoutjs
browserversion
buslanes
busybutton
bvhreader
calendar
canvas
canvas2
canvas3
canvasmandelbrot
canvasmandelbrot2
canvasnumbers
canvaszoom
capsule
changingimages
chatgptusingopenai
chatgptusingopenai2
chatgptusingopenai3
checkboxtoggle
chinesetiles
classes
classfeatures
clipboardbutton
clonenode
codedropdown
codemirror
codemirror2
collada
colorpick
columnresizer
contextmenu
convnet
cookiebanner
countdown
countdown2
countdown3
crop
css3dbarchart
css3dbarchart2
css3dbook
css3dscene
csscube
csscube2
csscube3
csscubevideos
cssfilelist
csshas
csspulse
cssresizeaspect
cssspin
csszooming
csvtoarray
customcheckbox
d3datamap
d3js
d3js10
d3js11
d3js2
d3js3
d3js4
d3js5
d3js6
d3js7
d3js8
d3js9
d3jsanimatedgrid
d3jsarctransition
d3jsarctransition2
d3jsaxis
d3jsaxischanging
d3jsbars
d3jsbrushing
d3jsbuslanes
d3jsbuslanes2
d3jscalendar
d3jscheat
d3jsclock
d3jscloudmap
d3jscogs
d3jscolors
d3jscovid
d3jscovid2
d3jscovid3
d3jsdashboard
d3jsdashboard2
d3jsdashboard3
d3jsdatakeyfunction
d3jsdensity
d3jsdragresizing
d3jsdragresizing2
d3jseach
d3jsease
d3jsevents
d3jsflower
d3jsforcegroups
d3jsforces
d3jsforces2
d3jsfractaltree
d3jsgeo
d3jsgroupbars
d3jsgroups
d3jsheatmap
d3jshex
d3jshierarchies
d3jshierarchies2
d3jshistogram
d3jshistogram2
d3jshistogram3
d3jshistogram4
d3jsinterpolate
d3jsjoin
d3jskmean
d3jskmean2
d3jsline
d3jsline2
d3jsline3
d3jsline4
d3jslinetransition
d3jslinetransition0
d3jslinetransition2
d3jsmaplocations
d3jsmaps
d3jsmaps2
d3jsmaps3
d3jsmisc
d3jsmisc2
d3jsmodule
d3jsmodulecolor
d3jsmultistyles
d3jsnobel
d3jsoverlappinggraphs
d3jspanel
d3jspie
d3jspieinterpolate
d3jssankey
d3jssankey2
d3jsscatter
d3jsshapes
d3jsslider
d3jsspending
d3jsspending2
d3jsspiralplot
d3jsspirograph
d3jssquare
d3jsstack
d3jsstackedbar
d3jsstackedbar2
d3jssunburst
d3jssunmoon
d3jssvglines
d3jssymbols
d3jstimelines
d3jsuk
d3jsvoronoi
d3scatterplot
d3timeline
d3timeline2
datalist
datamuse
date
dblclickhighlight
deviceorientation
dictionaryapi
dockermenu
doodlepad
downloadgif
dragdroplistitems
dragrotateresizediv
dragrotateresizediv2
dragrotateresizediv3
dragrotateresizediv4
dragrotateresizefontsize
dragselectbrush
drawlinesdiv
dropdown
dualquaternionimages
dynamicgrid
easefunctions
easeinterpolate3dplots
echart
echart2
echart3
encapsulation
epubviewer
errorstack
excalidraw
excalidraw2
excalidraw3
excalidraw5
expandable
faker
fetchplus
fileupload
fixedtopbar
fonts
fonts2
footerbar
fractalmaze
fractalmaze2
fractalnoiseimage
fractals
fractals2
fractaltree
freesvg
fresnel
froggerjs
gantt
gifgiphyapi
gifhex
gltffromscratch
gradients
griditems
griditems2
griditems3
griditems4
gridworms
heat
hexview
hexview2
highlight
icons
icons2
iframes
ik
imagetracertosvg
imgur
inputfile
invadersjs
ipynb
ipynb2
ipynb3
ipynb4
isbn13
isbn2
jpghex
jquery
jquery2
jqueryui
jqueryui2
jsdraganddrop
jslint
jsobfuscate
jsraytracer
jstree
jstree2
jszip
jszipimages
jszipread
keyframes
l2dwidget
lda
leftmenu
less
less2
lineargradientimage
linenumbers
loadimagefromfile
makepdf
maps
markdown
markdown2
markdownalerts
markdownalerts2
markdownbookmarks
markovimage
markovpixelblocks
mathjax
matrices
matsandvects
mazegamejs
md2tex
metrotiles
metrowindows
milestones
misc
misc2
modules
myipdetails
neataptic
networkstructures
networkstructures2
number
obj
objtojson
openaiimages
opencv
opencv2
opencv3
opencv4
opencv5
outline
p2
p5fractalleaf
p5fractalshape
p5js
p5js2
p5js3
p5jsanimatedcover
p5mengercube
p5snowflakes
palindrome
panel
parallax
paste
paste2
pasteimgfromurl
pdfjs
pdfjs2
pdfkit
pdfkit2
pdfkit3
pdfkit4
pdfkit5
pdfkit6
pdfmake
pdfmake2
pdfmake3
pdfmake4
pdfmake5
pdfmake6
perlin
perlin2
perlin3
perspective
pexels
playground
plotly
plotlynoise
plotlyranddist
plyloader
plyloader2
pngtxtencoder
pongjs
pptxgenjs
prettycode
prism
prn
problems
progress
pseudorandom
px2svg
python
quotes
racergame
random
randomprofilepatterns
randomstring
rating
rayambient
raymonte
raymonteprogressive
raymonteprogressive2
raymontewarmstart
reexpcross
reexpcross2
regex
regexbib
regexpfixbib
regexpmultiline
repeatwordsregexp
resizabletable
resizabletable2
revealjs
revealjs2
revealjsmulti
ritalanguage
ritalanguage2
ritalanguage3
rotateimg
rough
rsapublicprivatekeys
rss
rss2
sankey
scrappingsvg
scrolltext
scrolltext2
scrollwidth
sdfboxinboxtwist
sdfhollowbox
setintervalexception
shareurl
shuffle
sidecomment
similarity
simplehighlighter
simpleplatformgamejs
sinecanvas
sliderpopout
slides
smileys
snowfall
snowman
sound
soundsignal
sphererayintersection
springs
sqljs
steganography
stereogram
stringmatching
svg
svgchaos
svgdragresize
svgdragresize2
svgdragresize3
svgdragrotate
svgdrawing
svglines
svglines2
svglines3
svglines4
svglines5
svglinesmandelbrot
svgpathsdragrotate
svgpathsdragrotateresize
svgpie
svgpie2
svgpie3
svgpiepath
svgpiepath2
svgrandomfaces
symbols
synaptic
synaptic2
synonyms
tablerotatecells
tablerotatecells2
tablerotatecells3
tablerotatecells3b
tablerotatecells4
tables
tablezebra
tabularjs
tabularjs2
tabulatordownload
tagcanvas
tensorflowgan
tensorflowjs
tensorflowjsbasic
tensorflowjscnn
tensorflowjssinewave
tensorflowjssound
tensorflowmobilenet
tetrahedronfractal
tetrahedronfractalfolding
tetris
textarea
textareaauto
textareadiv
textareadiv2
textmaskimage
theirorthere
thesaurus
threejs
threejs2
threejs3
threejs4
threejsgltf
threejstokyo
tiles
toaster
tooltip
transition
transitionexpandabledropdown
treeview
treeview2
tricks
tshirt
tshirt2
tshirt3
turningpages
unsplash
urlblob
urlblob2
userdefinepoints
vector
videos
videos2
visualsort
vue
w2ui
w2uientertextdialog
webcam
webgl
webgl2
webgl3
webgl4
webgl5
webglbasic1
webglbasic2
webglcube
webglfov
webglfrustum
webgljson
webglleaves
webgllighting
webglorthographic
webglpoints1
webglpoints2
webglpoints3
webglsquare
webgltexture1
webgltexture2
webgltexture3
webgltransforms
webgltriangle
webgpu
webgpu10
webgpu11
webgpu12
webgpu13
webgpu14
webgpu15
webgpu16
webgpu17
webgpu2
webgpu3
webgpu4
webgpu5
webgpu6
webgpu7
webgpu8
webgpu9
webgpubars
webgpubuffers
webgpubuffers2
webgpucellnoise
webgpuclouds
webgpuclydescope
webgpucompute
webgpucubemap
webgpucubemap2
webgpudeferred
webgpudepth
webgpudof
webgpudrops
webgpuetha
webgpufire
webgpufractalcubes
webgpuglassrain
webgpugltf
webgpugltf2
webgpugrass
webgpugrid
webgpukernel
webgpukleinian
webgpulabupdates
webgpulighting
webgpumandelbrot
webgpumeta3d
webgpumetaballs
webgpumouse
webgpunoise
webgpunormalmapping
webgpuobj
webgpuparallax
webgpuparallax2
webgpuparallax3
webgpuparallaxshadow
webgpuparallaxshadow2
webgpupixel
webgpuquad
webgpuray1
webgpuraytracing
webgpuraytracing2
webgpushadowmaps
webgpushadowmaps2
webgpusierpinski2d
webgpusierpinski3d
webgpusinusoid
webgpussao
webgpustadiumobj
webgpuswirl
webgputestpipe3
webgputoon
webgputopology
webgputt
webgpuvolcloud
webgpuwater
webgpuwireframe
webgpuwireframe2
webpcanvas
webworkers
webxr
webxr2
wiggly
wikipedia