Added webapp.
This commit is contained in:
Felix Delattre
parent
129d98c57e
commit
2d568ab4c1
1 changed files with 227 additions and 0 deletions
227
webapp/index.html
Normal file
227
webapp/index.html
Normal file
|
|
@ -0,0 +1,227 @@
|
|||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<title>NDVI Viewer</title>
|
||||
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
|
||||
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
|
||||
<script src="https://cdn.jsdelivr.net/npm/geotiff@2.0.7/dist-browser/geotiff.js"></script>
|
||||
<script src="https://cdn.jsdelivr.net/npm/proj4@2.9.0/dist/proj4.js"></script>
|
||||
<style>
|
||||
body { margin: 20px; font-family: sans-serif; }
|
||||
.container { max-width: 1400px; margin: 0 auto; }
|
||||
.slider-container { margin: 20px 0; }
|
||||
#dateSlider { width: 100%; }
|
||||
#dateDisplay { text-align: center; margin: 10px 0; font-size: 18px; }
|
||||
.maps { display: flex; gap: 20px; }
|
||||
.map-container { flex: 1; }
|
||||
.map-container h3 { margin: 10px 0; text-align: center; }
|
||||
.timeseries { width: 100%; height: 120px; border: 1px solid #ccc; margin-bottom: 10px; }
|
||||
.map { height: 500px; border: 1px solid #ccc; }
|
||||
.leaflet-image-layer { image-rendering: pixelated; }
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<div class="container">
|
||||
<div class="slider-container">
|
||||
<input type="range" id="dateSlider" min="0" max="365" value="0">
|
||||
<div id="dateDisplay">2024-01-01</div>
|
||||
</div>
|
||||
<div class="maps">
|
||||
<div class="map-container">
|
||||
<h3>S2</h3>
|
||||
<canvas id="s2timeseries" class="timeseries"></canvas>
|
||||
<div id="s2map" class="map"></div>
|
||||
</div>
|
||||
<div class="map-container">
|
||||
<h3>S3</h3>
|
||||
<canvas id="s3timeseries" class="timeseries"></canvas>
|
||||
<div id="s3map" class="map"></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<script>
|
||||
proj4.defs("EPSG:32632", "+proj=utm +zone=32 +datum=WGS84 +units=m +no_defs");
|
||||
proj4.defs("EPSG:4326", "+proj=longlat +datum=WGS84 +no_defs");
|
||||
|
||||
const start = new Date(2024, 0, 1);
|
||||
const slider = document.getElementById("dateSlider");
|
||||
const dateDisplay = document.getElementById("dateDisplay");
|
||||
const osmUrl = "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png";
|
||||
const osmOpts = { attribution: "OpenStreetMap" };
|
||||
const maps = {
|
||||
s2: L.map("s2map").setView([47.27, 11.39], 12).addLayer(L.tileLayer(osmUrl, osmOpts)),
|
||||
s3: L.map("s3map").setView([47.27, 11.39], 12).addLayer(L.tileLayer(osmUrl, osmOpts))
|
||||
};
|
||||
const overlays = { s2: null, s3: null };
|
||||
let timeseries = { s2: [], s3: [] };
|
||||
|
||||
async function loadTimeseries() {
|
||||
const [s2, s3] = await Promise.all([
|
||||
fetch("../data/innsbruck/2024/ndvi/s2/timeseries.json").then(r => r.json()),
|
||||
fetch("../data/innsbruck/2024/ndvi/s3/timeseries.json").then(r => r.json())
|
||||
]);
|
||||
timeseries = { s2, s3 };
|
||||
drawTimeseries();
|
||||
}
|
||||
|
||||
function drawTimeseries() {
|
||||
const currentDate = dateFromDays(parseInt(slider.value));
|
||||
for (const source of ["s2", "s3"]) {
|
||||
const canvas = document.getElementById(`${source}timeseries`);
|
||||
const ctx = canvas.getContext("2d");
|
||||
canvas.width = canvas.offsetWidth;
|
||||
canvas.height = 120;
|
||||
const w = canvas.width, h = canvas.height;
|
||||
const pad = 30;
|
||||
const plotW = w - pad * 2, plotH = h - pad * 2;
|
||||
|
||||
ctx.clearRect(0, 0, w, h);
|
||||
const data = timeseries[source].filter(t => t.ndvi !== null);
|
||||
if (!data.length) continue;
|
||||
|
||||
const dates = data.map(t => new Date(t.date));
|
||||
const minDate = new Date(Math.min(...dates));
|
||||
const maxDate = new Date(Math.max(...dates));
|
||||
const dateRange = maxDate - minDate;
|
||||
|
||||
const ndvi = data.map(t => t.ndvi);
|
||||
const minNdvi = Math.min(...ndvi);
|
||||
const maxNdvi = Math.max(...ndvi);
|
||||
const ndviRange = maxNdvi - minNdvi;
|
||||
|
||||
const x = (d) => pad + ((new Date(d) - minDate) / dateRange) * plotW;
|
||||
const y = (v) => pad + plotH - ((v - minNdvi) / ndviRange) * plotH;
|
||||
|
||||
ctx.strokeStyle = "#ccc";
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(pad, pad);
|
||||
ctx.lineTo(pad, pad + plotH);
|
||||
ctx.lineTo(pad + plotW, pad + plotH);
|
||||
ctx.stroke();
|
||||
|
||||
ctx.fillStyle = "#000";
|
||||
ctx.font = "9px sans-serif";
|
||||
ctx.fillText(minNdvi.toFixed(2), 2, pad + plotH + 10);
|
||||
ctx.fillText(maxNdvi.toFixed(2), 2, pad + 3);
|
||||
|
||||
ctx.strokeStyle = source === "s2" ? "#0066ff" : "#ff6600";
|
||||
ctx.beginPath();
|
||||
let first = true;
|
||||
for (const t of data) {
|
||||
const px = x(t.date), py = y(t.ndvi);
|
||||
if (first) { ctx.moveTo(px, py); first = false; }
|
||||
else ctx.lineTo(px, py);
|
||||
}
|
||||
ctx.stroke();
|
||||
|
||||
const xPos = x(currentDate);
|
||||
ctx.strokeStyle = "#f00";
|
||||
ctx.lineWidth = 2;
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(xPos, pad);
|
||||
ctx.lineTo(xPos, pad + plotH);
|
||||
ctx.stroke();
|
||||
}
|
||||
}
|
||||
|
||||
async function findFile(dateStr, source) {
|
||||
const target = new Date(dateStr);
|
||||
for (let offset = 0; offset < 15; offset++) {
|
||||
for (const dir of [0, -1, 1]) {
|
||||
const d = new Date(target);
|
||||
d.setDate(d.getDate() + offset * dir);
|
||||
const date = d.toISOString().split("T")[0].replace(/-/g, "");
|
||||
for (let i = 0; i < 3; i++) {
|
||||
const filename = `${date}_${i}.geotiff`;
|
||||
try {
|
||||
const res = await fetch(`../data/innsbruck/2024/${source}/${filename}`);
|
||||
if (res.ok) return filename;
|
||||
} catch {}
|
||||
}
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
function transformBounds(bbox, fromCRS) {
|
||||
const [sw, ne] = [proj4(fromCRS, "EPSG:4326", [bbox[0], bbox[1]]), proj4(fromCRS, "EPSG:4326", [bbox[2], bbox[3]])];
|
||||
return [[sw[1], sw[0]], [ne[1], ne[0]]];
|
||||
}
|
||||
|
||||
async function loadGeotiff(source, filename) {
|
||||
const tiff = await GeoTIFF.fromArrayBuffer(await (await fetch(`../data/innsbruck/2024/${source}/${filename}`)).arrayBuffer());
|
||||
const image = await tiff.getImage();
|
||||
const rasters = await image.readRasters();
|
||||
const width = image.getWidth();
|
||||
const height = image.getHeight();
|
||||
const bbox = image.getBoundingBox();
|
||||
const geoKeys = image.getGeoKeys();
|
||||
const crsCode = geoKeys.ProjectedCSTypeGeoKey ? `EPSG:${geoKeys.ProjectedCSTypeGeoKey}` :
|
||||
geoKeys.GeographicTypeGeoKey !== 4326 ? `EPSG:${geoKeys.GeographicTypeGeoKey}` : "EPSG:4326";
|
||||
|
||||
const bandIndices = [0, 1, 2];
|
||||
const [blue, green, red] = bandIndices.map(i => Array.from(rasters[i]));
|
||||
|
||||
const normalize = (arr) => {
|
||||
let min = Infinity, max = -Infinity;
|
||||
for (const v of arr) if (!isNaN(v) && v > 0) { min = Math.min(min, v); max = Math.max(max, v); }
|
||||
return arr.map(v => Math.max(0, Math.min(255, ((v - min) / (max - min || 1)) * 255)));
|
||||
};
|
||||
|
||||
const [rNorm, gNorm, bNorm] = [red, green, blue].map(normalize);
|
||||
|
||||
const canvas = Object.assign(document.createElement("canvas"), { width, height });
|
||||
const ctx = canvas.getContext("2d");
|
||||
ctx.imageSmoothingEnabled = false;
|
||||
const imgData = ctx.createImageData(width, height);
|
||||
|
||||
for (let i = 0; i < rNorm.length; i++) {
|
||||
const idx = i * 4;
|
||||
if (rNorm[i] === 0 && gNorm[i] === 0 && bNorm[i] === 0) {
|
||||
imgData.data[idx + 3] = 0;
|
||||
} else {
|
||||
imgData.data[idx] = rNorm[i];
|
||||
imgData.data[idx + 1] = gNorm[i];
|
||||
imgData.data[idx + 2] = bNorm[i];
|
||||
imgData.data[idx + 3] = 255;
|
||||
}
|
||||
}
|
||||
ctx.putImageData(imgData, 0, 0);
|
||||
|
||||
const bounds = crsCode === "EPSG:4326" ? [[bbox[1], bbox[0]], [bbox[3], bbox[2]]] : transformBounds(bbox, crsCode);
|
||||
if (overlays[source]) maps[source].removeLayer(overlays[source]);
|
||||
overlays[source] = L.imageOverlay(canvas.toDataURL(), bounds, { opacity: 0.7 }).addTo(maps[source]);
|
||||
maps[source].fitBounds(bounds);
|
||||
}
|
||||
|
||||
const fmtDate = (d) => `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(d.getDate()).padStart(2, "0")}`;
|
||||
const dateFromDays = (days) => fmtDate(new Date(start.getTime() + days * 86400000));
|
||||
const daysFromDate = (dateStr) => {
|
||||
const [y, m, d] = dateStr.split("-").map(Number);
|
||||
return Math.floor((new Date(y, m - 1, d) - start) / 86400000);
|
||||
};
|
||||
|
||||
async function updateImages() {
|
||||
const date = dateFromDays(parseInt(slider.value));
|
||||
dateDisplay.textContent = date;
|
||||
history.replaceState({}, "", `?date=${date}`);
|
||||
drawTimeseries();
|
||||
for (const source of ["s2", "s3"]) {
|
||||
const filename = await findFile(date, source);
|
||||
if (filename) {
|
||||
try {
|
||||
await loadGeotiff(source, filename);
|
||||
} catch (e) {
|
||||
console.error(`Error loading ${source}:`, e);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const urlDate = new URLSearchParams(location.search).get("date");
|
||||
if (urlDate) slider.value = daysFromDate(urlDate);
|
||||
slider.addEventListener("input", updateImages);
|
||||
loadTimeseries().then(updateImages);
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
Loading…
Add table
Add a link
Reference in a new issue