Function: writeLayers()

function writeLayers(layers, options?): Promise<WrittenLayer[]>;

Defined in: layers.ts:153

Converts several GeoJSON inputs, without packing them.

Use this when you want the per-layer metadata — feature counts, field renames, skipped features — and not just the bytes. Feed the result to zipLayers when you are ready to pack it.

Parameters

Parameter	Type	Description
layers	readonly LayerInput[]	The layers to write.
options	WriteLayersOptions	Shared write options. layout, folder and level are ignored here; they matter only when packing.

Returns

Promise<WrittenLayer[]>

One entry per layer, in the order given.

Throws

If layers is empty, if two layers resolve to the same name, or if any layer fails to convert.

Example

Report on a batch before shipping it

const written = await writeLayers(layers, { epsg: 26915 });

for (const layer of written) {
  console.log(layer.name, layer.parts.shapeType, layer.parts.featureCount);
  if (layer.parts.skippedCount) {
    console.warn(`${layer.name}: skipped ${layer.parts.skippedCount}`);
  }
}

const zip = zipLayers(written, { layout: 'folders' });