Layer Extent

This guide explains how the Geospatial SDK retrieves and manages geographic extents (bounding boxes) for different layer types.

Overview

The geographic extent of a layer represents its bounding box in geographic coordinates (EPSG:4326). The SDK provides automated extent retrieval through the createViewFromLayer() function, which looks for the layer extent asynchronously in various ways depending on the layer type:

• either the service capabilities will be fetched using ogc-client
• or the data is parsed and analyzed in memory to compute the encompassing bounds

import { createViewFromLayer } from "@geospatial-sdk/core";

const layer = {
  type: "wms",
  url: "https://example.com/wms",
  name: "myLayer",
};

const view = await createViewFromLayer(layer);
if (view) {
  console.log("Extent:", view.extent); // [minLon, minLat, maxLon, maxLat]
}

Unsupported Layer Types

For now, only certain layer types are supported:

• WMS
• WMTS
• WFS
• GeoJSON (if the data is passed inline with the layer object)