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SKILL_JS5_ARCGIS / arcgis-advanced-layers

AGENTS.md1 starsChanged 6 months agoMITView on GitHub

Quick-reference for OGC, dynamic, and catalog layers. Read before integrating external services. 1. Protocol? WMS → WMSLayer; WMTS → WMTSLayer; WFS 2.0.0 + GeoJSON → WFSLayer; OGC API Features → OGCFeatureLayer; KML → KMLLayer; ArcGIS MapServer → MapImageLayer; catalog layer in a FeatureServer → CatalogLayer (a MapServer is rejected). 2. Toggle a MapServer sublayer? Mutate sublayer.visible, don't re-create. 3. Need to query? WFS yes; WMS no (images).

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AGENTS.md

Agent Guide: arcgis-advanced-layers

Quick-reference for OGC, dynamic, and catalog layers. Read before integrating external services.

Quick Decision Tree

  1. Protocol? WMS → WMSLayer; WMTS → WMTSLayer; WFS 2.0.0 + GeoJSON → WFSLayer; OGC API Features → OGCFeatureLayer; KML → KMLLayer; ArcGIS MapServer → MapImageLayer; catalog layer in a FeatureServer → CatalogLayer (a MapServer is rejected).
  2. Toggle a MapServer sublayer? Mutate sublayer.visible, don't re-create.
  3. Need to query? WFS yes; WMS no (images).

Setup Checklist

  • Use HTTPS endpoints; configure CORS or a proxy for third-party hosts.
  • For MapImageLayer, set sublayers with { id, visible }.
  • await layer.load() before inspecting CatalogLayer contents (footprintLayer, dynamicGroupLayer).
  • WMS names: load once without sublayers and read allSublayers (a wrong name fails silently).
  • Declared MapImageLayer.sublayers replace the service list: list all you keep.

Anti-patterns (one-liner reminders)

  • ❌ Querying features from a WMS layer, or OGCFeatureLayer.queryFeatures() (query its layer view).
  • ❌ WFSLayer on a WFS 1.x-only server.
  • ❌ Re-creating a MapImageLayer to toggle a sublayer.
  • ❌ Mixed-content (http on https page) OGC URLs.

Files in This Skill

  • SKILL.md / SKILL.es.md — full guides
  • references/api-detail.md — WMS/WFS/MapImage/Catalog signatures
  • references/examples.md — sublayer + OGC examples
  • references/pitfalls.md — extended troubleshooting
  • scripts/snippet-wms.ts, snippet-mapimage.ts, snippet-catalog.ts

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