"JAXA Earth API for JavaScript" examples on the Observable by the JAXA Earth Observation Research Center
Public
Edited
Feb 3
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Digital Surface Model - JAXA AW3D
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Simple Examples
je = require("https://data.earth.jaxa.jp/api/javascript/v1.2.3/jaxa.earth.umd.js");
img = await je.getImage({
collection,
bbox: [-180,-90,180,90], //west,south,east,north
width: 1000, //px
height: 500, //px
colorMap: {
min: 0,
max: 6000,
colors: "jet", //blue-green-orange-red
},
});
img.getCanvas();
img.getLegend(300,20,10);
data = img.getData();
//ignore NaN (no data area such as ocean) and 0m or less (such as sea) and store to array named "plotData" as an object
//NaN（非数値。外洋などでデータが無い部分など）や0m以下の部分（海など）を無視し、プロット用のオブジェクト配列としてplotDataに格納
plotData = {
//Float32Array
const validData = data.data.filter(e => !isNaN(e)).filter(e => e > 0);
const plotData = [];
for(let i=0;i<validData.length;i++){
plotData.push({"elevation": validData[i]});
}
return plotData;
}
Plot.plot({
x: {
grid: true
},
y: {
grid: true
},
color: {
legend: true
},
grid: true,
marks: [
Plot.rectY(plotData, Plot.binX({y: "count"}, {x: "elevation"})),
Plot.ruleY([0])
]
})
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