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* wip trips layer * update lockfile * wip * updates * lint * fix package json * Working trips layer * lint * bump version
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import React, { useState, useEffect } from "react"; | ||
import { createRoot } from "react-dom/client"; | ||
import { StaticMap, MapContext, NavigationControl } from "react-map-gl"; | ||
import DeckGL, { Layer, PickingInfo } from "deck.gl/typed"; | ||
import { GeoArrowTripsLayer } from "@geoarrow/deck.gl-layers"; | ||
import * as arrow from "apache-arrow"; | ||
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const GEOARROW_POINT_DATA = "http://localhost:8080/trips.feather"; | ||
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const INITIAL_VIEW_STATE = { | ||
longitude: -74, | ||
latitude: 40.72, | ||
zoom: 13, | ||
pitch: 45, | ||
bearing: 0, | ||
}; | ||
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const MAP_STYLE = | ||
"https://basemaps.cartocdn.com/gl/positron-nolabels-gl-style/style.json"; | ||
const NAV_CONTROL_STYLE = { | ||
position: "absolute", | ||
top: 10, | ||
left: 10, | ||
}; | ||
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function Root() { | ||
const trailLength = 180; | ||
// unit corresponds to the timestamp in source data | ||
const loopLength = 1800; | ||
const animationSpeed = 1; | ||
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const [time, setTime] = useState(0); | ||
const [animation] = useState<{ id: number }>({ id: 0 }); | ||
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const animate = () => { | ||
setTime((t) => (t + animationSpeed) % loopLength); | ||
animation.id = window.requestAnimationFrame(animate); | ||
}; | ||
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useEffect(() => { | ||
animation.id = window.requestAnimationFrame(animate); | ||
return () => window.cancelAnimationFrame(animation.id); | ||
}, [animation]); | ||
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const onClick = (info: PickingInfo) => { | ||
if (info.object) { | ||
console.log(JSON.stringify(info.object.toJSON())); | ||
} | ||
}; | ||
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const [table, setTable] = useState<arrow.Table | null>(null); | ||
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useEffect(() => { | ||
// declare the data fetching function | ||
const fetchData = async () => { | ||
const data = await fetch(GEOARROW_POINT_DATA); | ||
const buffer = await data.arrayBuffer(); | ||
const table = arrow.tableFromIPC(buffer); | ||
setTable(table); | ||
}; | ||
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if (!table) { | ||
fetchData().catch(console.error); | ||
} | ||
}); | ||
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const layers: Layer[] = []; | ||
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table && | ||
layers.push( | ||
new GeoArrowTripsLayer({ | ||
id: "geoarrow-linestring", | ||
data: table, | ||
getColor: [255, 0, 0], | ||
getPath: table.getChild("geometry")!, | ||
getTimestamps: table.getChild("timestamps")!, | ||
widthMinPixels: 2, | ||
pickable: true, | ||
trailLength, | ||
currentTime: time, | ||
}), | ||
); | ||
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return ( | ||
<DeckGL | ||
initialViewState={INITIAL_VIEW_STATE} | ||
controller={true} | ||
layers={layers} | ||
ContextProvider={MapContext.Provider} | ||
onClick={onClick} | ||
glOptions={{ | ||
powerPreference: "high-performance", | ||
}} | ||
> | ||
<StaticMap mapStyle={MAP_STYLE} /> | ||
<NavigationControl style={NAV_CONTROL_STYLE} /> | ||
</DeckGL> | ||
); | ||
} | ||
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/* global document */ | ||
const container = document.body.appendChild(document.createElement("div")); | ||
createRoot(container).render(<Root />); |
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import requests | ||
import numpy as np | ||
import pyarrow as pa | ||
import pyarrow.feather as feather | ||
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url = "https://raw.githubusercontent.com/visgl/deck.gl-data/master/examples/trips/trips-v7.json" | ||
r = requests.get(url) | ||
data = r.json() | ||
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coord_num = 0 | ||
geoms_num = len(data) | ||
offsets = np.zeros(geoms_num + 1, dtype=np.int32) | ||
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for i, item in enumerate(data): | ||
assert len(item["path"]) == len(item["timestamps"]) | ||
coord_num += len(item["path"]) | ||
offsets[i + 1] = coord_num | ||
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vendor = np.zeros(geoms_num, dtype=np.uint8) | ||
coords = np.zeros((coord_num, 2), dtype=np.float32) | ||
timestamps = np.zeros(coord_num, dtype=np.float32) | ||
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for i, item in enumerate(data): | ||
start_offset = offsets[i] | ||
end_offset = offsets[i + 1] | ||
path = np.array(item["path"]) | ||
assert end_offset - start_offset == path.shape[0] | ||
coords[start_offset:end_offset, :] = path | ||
timestamps[start_offset:end_offset] = item["timestamps"] | ||
vendor[i] = item["vendor"] | ||
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coords_fixed_size_list = pa.FixedSizeListArray.from_arrays( | ||
pa.array(coords.flatten("C")), 2 | ||
) | ||
linestrings_arr = pa.ListArray.from_arrays(pa.array(offsets), coords_fixed_size_list) | ||
timestamp_arr = pa.ListArray.from_arrays(pa.array(offsets), timestamps) | ||
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table = pa.table( | ||
{"geometry": linestrings_arr, "timestamps": timestamp_arr, "vendor": vendor} | ||
) | ||
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feather.write_feather(table, "trips.feather", compression="uncompressed") |
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<!doctype html> | ||
<html lang="en"> | ||
<head> | ||
<meta charset="utf-8"> | ||
<title>deck.gl GeoArrowTripsLayer Example</title> | ||
<style> | ||
body {margin: 0; width: 100vw; height: 100vh; overflow: hidden;} | ||
</style> | ||
</head> | ||
<body> | ||
</body> | ||
<script type="module" src="app.tsx"></script> | ||
</html> |
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{ | ||
"name": "deckgl-example-geoarrow-trips-layer", | ||
"version": "0.0.0", | ||
"private": true, | ||
"license": "MIT", | ||
"scripts": { | ||
"start": "vite --open", | ||
"build": "vite build" | ||
}, | ||
"dependencies": { | ||
"@geoarrow/deck.gl-layers": "../../", | ||
"apache-arrow": ">=14", | ||
"deck.gl": "^8.9.23", | ||
"react": "^18.0.0", | ||
"react-dom": "^18.0.0", | ||
"react-map-gl": "^5.3.0" | ||
}, | ||
"devDependencies": { | ||
"@types/react": "^18.0.0", | ||
"@types/react-dom": "^18.0.0", | ||
"vite": "^4.0.0" | ||
}, | ||
"volta": { | ||
"extends": "../../package.json" | ||
} | ||
} |
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