Swapped lat/lng order sends every point to the Antarctic

• Beijing stations render near the Antarctic coast or along a straight line at the equator.
• Error: deck.gl: attribute positions: length 2400 is not divisible by size 3.
• A PathLayer on the same records draws nothing while the scatterplot still shows points.

1. Print data[0] with its raw field names and values.
2. Call deck.pickObject at the intended location to see whether the data or the projection is wrong.
3. Check that getPath and getPolygon arrays have a uniform arity.
4. Verify each returned position against a known landmark.

Normalize fields to { lng, lat } before creating the layer and always return [d.lng, d.lat]; declare positionFormat: 'XY' for 2D paths and pad missing z with 0 for 'XYZ'.

Error: deck.gl: attribute positions: length 2400 is not divisible by size 3
    at Attribute.updateBuffer (attribute.js:512)

console.log(data[0]);
// { lng: 116.391, lat: 39.907, z: null }
var p = [data[0].lat, data[0].lng];
console.log('错误写法得到的坐标', p);   // [39.907, 116.391]

• Patching the accessor with a per-record conditional hides the field mismatch and still leaves some features misplaced.
• Adding z to only some points keeps the total length indivisible and the buffer still fails.