Public
Edited
Nov 25, 2023
filtered = {
const minDate = new Date(2000, 0, 1);
const arr = [];
for (const o of locations) {
if (o.accuracy < 40 && o.timestamp > minDate) {
//if (o.timestamp > minDate) {
const d = distance(o, center);
if (d < 0.6) {
arr.push({ ...o, distance: d });
}
}
}
return arr;
}
days = {
const s = new Set();
for (const o of filtered) {
const d = o.timestamp;
s.add(
[d.getFullYear(), d.getMonth() + 1, d.getDate()]
.map((d) => String(d).padStart(2, "0"))
.join("-")
);
}
return Array.from(s)
.map((s) => {
if (s.length === 10) {
const [yyyy, mm, dd] = [
s.slice(0, 4),
s.slice(5, 7),
s.slice(8, 10)
].map((s) => +s);
return new Date(Date.UTC(yyyy, mm - 1, dd));
}
return null;
})
.sort();
}
days.length
Calendar(days, { date: (o) => o, value: (o) => 1 })
function distance(
{ latitude: latitude0, longitude: longitude0 },
{ latitude: latitude1, longitude: longitude1 }
) {
var R = 6371;
var dLat = deg2rad((latitude1 - latitude0) / 1e7);
var dLon = deg2rad((longitude1 - longitude0) / 1e7);
var a =
Math.sin(dLat / 2) * Math.sin(dLat / 2) +
Math.cos(deg2rad(latitude0 / 1e7)) *
Math.cos(deg2rad(latitude1 / 1e7)) *
Math.sin(dLon / 2) *
Math.sin(dLon / 2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
var d = R * c;
return d;
}
function deg2rad(deg) {
return deg * (Math.PI/180)
}
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