add wip gdaldem histojams

package.json

@@ -12,7 +12,8 @@
     "@observablehq/framework": "^1.10.1",
     "d3": "^7.9.0",
     "d3-dsv": "^3.0.1",
-    "d3-time-format": "^4.1.0"
+    "d3-time-format": "^4.1.0",
+    "dicopal": "^0.8.1"
   },
   "devDependencies": {
     "rimraf": "^5.0.5"

src/data/dicopaldata.json.js

@@ -0,0 +1,20 @@
+import * as dicopal from "dicopal";
+
+const div = dicopal.getPalettes({ type: "diverging", number: 7 });
+const seq = dicopal.getPalettes({ type: "sequential", number: 7 });
+const custom = [
+  {"type":"sequential","colors":["#E4EEC6","#C3E0A7","#8DCB81","#64AD66","#378C4D","#296634","#1C401F"]},
+  {"type":"sequential","colors":["#D9E9F5","#BACCE8","#8D9CCD","#6678B8","#3C59A6","#214080","#001C5E"]},
+  {"type":"sequential","colors":["#E1F0DC","#BCE1D0","#94D2C4","#5EB4B4","#0098A6","#03707D","#054957"]},
+  {"type":"sequential","colors":["#FEE1D6","#FEC0BF","#F496A0","#E16E87","#C64974","#A32A64","#77184F"]},
+  {"type":"sequential","colors":["#FAECB7","#FDD881","#FCB817","#F49D21","#EA8026","#BA4F28","#8B1B26"]},
+  {"type":"diverging","colors":["#8B1B26","#BA4F28","#F08E23","#FCDD8E","#FBF7EA","#B6DED2","#6CAFAC","#07717D","#054957"]},
+  {"type":"diverging","colors":["#5A0C0C","#A03035","#E1746F","#F9C5BC","#FBF7EA","#CFDBE8","#90A2D1","#3A56A3","#001C5E"]},
+  {"type":"diverging","colors":["#5C1339","#A33166","#D783A0","#FCD5D2","#FBF7EA","#E5E8B3","#84C77B","#2F8749","#1C401F"]}
+]
+
+const cmaps = [...custom, ...seq, ...div]
+
+
+
+process.stdout.write(JSON.stringify(cmaps));