Third-party open-source ArcGIS app readiness

Every other migration number Honua publishes comes from Honua-authored fixtures. This page does not: it reports what honua-migrate does to real, third-party, open-source ArcGIS JS applications that were written by other people, for their own purposes, with no knowledge of the codemod.

The corpus pins 6 public GitHub repositories at an exact commit with a reviewed permissive license. No third-party source is vendored here — the lane clones into an ignored scratch directory, analyzes the working copy, and keeps only the structured records below.

Observation generated: 2026-08-04T02:41:27.182Z
Manifest revision: 2026-08-04
Codemod target: honua-compat
Lane: opt-in only (HONUA_OSS_ARCGIS_CORPUS_ENABLED=true), never part of pull-request CI, static analysis only (no live Esri service contact).

Corpus totals

Metric	Value
Apps pinned	6
Apps observed	6
Apps errored	0
Readiness `ready` / `assisted` / `blocked`	0 / 6 / 0
Codemod-scoped call sites	171
Auto-migrated call sites	75
Auto-migrated call-site ratio	43.9%
ArcGIS module hits outside codemod scope	146
Apps with no ArcGIS usage detected	0

Top manual-TODO kinds across the corpus

Kind	Manual TODOs
`label-class`	18
`map-view`	10
`text-symbol`	9
`feature-layer`	7
`graphics-layer`	6

Per-app readiness

App	Styles	Readiness	Auto-migrated	Manual TODOs	Unhandled hits	Blocking flags
CMV — Configurable Map Viewer	`amd-require`, `widget-heavy`	`assisted`	0.0% (0/27)	27	69	—
WSDOT Bridge Vertical Clearance	`amd-require`, `featurelayer-centric`, `widget-heavy`	`assisted`	54.5% (6/11)	5	15	—
National Park Visits explorer	`amd-require`, `widget-heavy`	`assisted`	21.7% (15/69)	54	58	—
Utah statewide parcel viewer	`featurelayer-centric`	`assisted`	85.4% (41/48)	7	2	—
Utah Bikeways / WFRC bike map	`featurelayer-centric`, `widget-heavy`	`assisted`	77.8% (7/9)	2	1	—
Owls of Bavaria	`featurelayer-centric`	`assisted`	85.7% (6/7)	1	1	—

App detail

CMV — Configurable Map Viewer

A long-running community-maintained configurable ArcGIS JS 3.x viewer built on Dojo dijit widgets. Local governments deploy it as-is with a JSON config; it is the single most representative example of the legacy AMD viewer a migrating team actually owns.

Author: The Configurable Map Viewer community project (civic-tech)
Repository: https://github.com/cmv/cmv-app
Pinned commit: 8b42b2336b1a4b357dda791c8e492b9612a5f51b
License: MIT — https://github.com/cmv/cmv-app/blob/8b42b2336b1a4b357dda791c8e492b9612a5f51b/LICENSE
Observed: 2026-08-04
Scan root: viewer/js

filesScanned=136 filesWithArcGisImports=22 importCount=69 esriLeafletImportCount=0 topSymbols=[Draw:16, BasemapLayer:12, GraphicsLayer:11, BasemapGallery:9, Basemap:9, units:8, FeatureLayer:8, Legend:8, SimpleRenderer:7, SimpleLineSymbol:7] flags=[amd-dependency-arrays-detected, arcgis-3x-dijit-detected, auth-or-request-customization-detected, webmap-detected]

Metric	Value
Readiness	`assisted`
Files scanned	136
Files importing ArcGIS modules	22
Codemod-scoped call sites	27
Auto-migrated call-site ratio	0.0%
Manual-rewrite ratio	100.0%
Manual-intervention ratio	100.0%
Widget sites (automated / assisted / manual)	0 / 0 / 0
Widget gate (`--gate 0`)	pass at 100.0% automated

Top manual-TODO kinds:

graphics-layer — 6
simple-renderer — 4
simple-fill-symbol — 3
simple-line-symbol — 3
extent-geometry — 2

Top ArcGIS modules outside codemod scope:

esri/layers/GraphicsLayer (amd-dependency) — 5
esri/graphic (amd-dependency) — 3
esri/renderers/SimpleRenderer (amd-dependency) — 3
esri/config (amd-dependency) — 2
esri/dijit/BasemapGallery (amd-dependency) — 2

WSDOT Bridge Vertical Clearance

A production state-DOT lookup tool that lets freight operators find bridge vertical clearances along a route. Classic ArcGIS JS 3.25 with esri/map, esri/layers/FeatureLayer, esri/tasks/query, and esri/dijit widgets, written in TypeScript against @types/arcgis-js-api.

Author: Washington State Department of Transportation, GIS Office (government)
Repository: https://github.com/WSDOT-GIS/bridge-clearance-app
Pinned commit: f07daaf455ac7c625c2d283c8d9df1e94665e4ea
License: Unlicense — https://github.com/WSDOT-GIS/bridge-clearance-app/blob/f07daaf455ac7c625c2d283c8d9df1e94665e4ea/UNLICENSE
Observed: 2026-08-04
Scan root: src

filesScanned=1 filesWithArcGisImports=1 importCount=21 esriLeafletImportCount=0 topSymbols=[Graphic:16, FeatureLayer:12, CartographicLineSymbol:9, Extent:6, Color:3, esriConfig:3, Geocoder:3, domUtils:3, UniqueValueRenderer:3, SimpleMarkerSymbol:3] flags=[arcgis-3x-dijit-detected, auth-or-request-customization-detected]

Metric	Value
Readiness	`assisted`
Files scanned	1
Files importing ArcGIS modules	1
Codemod-scoped call sites	11
Auto-migrated call-site ratio	54.5%
Manual-rewrite ratio	45.5%
Manual-intervention ratio	76.9%
Widget sites (automated / assisted / manual)	0 / 0 / 0
Widget gate (`--gate 0`)	pass at 100.0% automated

Top manual-TODO kinds:

feature-layer — 2
unique-value-renderer — 2
extent-geometry — 1

Top ArcGIS modules outside codemod scope:

esri (static-import) — 1
esri/dijit/BasemapGallery (static-import) — 1
esri/dijit/Geocoder (static-import) — 1
esri/dijit/HomeButton (static-import) — 1
esri/dijit/Popup (static-import) — 1

National Park Visits explorer

A time-series visualization of US National Park visitation built on the ArcGIS JS 4.23 AMD build. Uses the TypeScript import X = require("esri/...") form plus Legend, Slider, Feature, and Expand widgets — the transitional 4.x-on-AMD shape many teams are still stuck in.

Author: Kristian Ekenes (individual)
Repository: https://github.com/ekenes/national-park-visits
Pinned commit: 99b17289593454cc093648f7ba85b51f8ff25bad
License: Apache-2.0 — https://github.com/ekenes/national-park-visits/blob/99b17289593454cc093648f7ba85b51f8ff25bad/LICENSE
Observed: 2026-08-04
Scan root: app

filesScanned=23 filesWithArcGisImports=16 importCount=66 esriLeafletImportCount=0 topSymbols=[SizeStop:33, LabelClass:23, MapView:23, symbols_1:17, ClassBreaksRenderer:13, TextSymbol:9, FeatureLayer:9, SizeVariable:8, StatisticDefinition:8, intl:8] flags=[amd-dependency-arrays-detected, arcgis-barrel-imports-detected, commonjs-detected, typescript-import-equals-detected, webmap-detected]

Metric	Value
Readiness	`assisted`
Files scanned	23
Files importing ArcGIS modules	16
Codemod-scoped call sites	69
Auto-migrated call-site ratio	21.7%
Manual-rewrite ratio	78.3%
Manual-intervention ratio	88.2%
Widget sites (automated / assisted / manual)	6 / 0 / 2
Widget gate (`--gate 0`)	pass at 75.0% automated

Top manual-TODO kinds:

label-class — 18
text-symbol — 9
map-view — 8
expand-widget — 4
feature-layer — 4

Top ArcGIS modules outside codemod scope:

esri/symbols (amd-dependency) — 4
esri/views/MapView (import-equals) — 4
esri/layers/FeatureLayer (import-equals) — 2
esri/renderers (amd-dependency) — 2
esri/renderers/visualVariables/SizeVariable (amd-dependency) — 2

Utah statewide parcel viewer

The public statewide parcel viewer operated by Utah's state geospatial office. React + TypeScript over @arcgis/core with the imperative new EsriMap() / new MapView({ container }) pattern and a FeatureLayer per county dataset.

Author: Utah Geospatial Resource Center (UGRC) (government)
Repository: https://github.com/agrc/parcels
Pinned commit: 996fd3e6a597db4996d18a607da8ece72a5b5fa0
License: MIT — https://github.com/agrc/parcels/blob/996fd3e6a597db4996d18a607da8ece72a5b5fa0/LICENSE
Observed: 2026-08-04
Scan root: src

filesScanned=11 filesWithArcGisImports=6 importCount=14 esriLeafletImportCount=0 topSymbols=[Extent:30, Graphic:14, Viewpoint:8, MapView:7, Polygon:4, FeatureLayer:2, VectorTileLayer:2, EsriMap:2, Point:2, watch:1] flags=[auth-or-request-customization-detected]

Metric	Value
Readiness	`assisted`
Files scanned	11
Files importing ArcGIS modules	6
Codemod-scoped call sites	48
Auto-migrated call-site ratio	85.4%
Manual-rewrite ratio	14.6%
Manual-intervention ratio	18.0%
Widget sites (automated / assisted / manual)	0 / 0 / 0
Widget gate (`--gate 0`)	pass at 100.0% automated

Top manual-TODO kinds:

polygon-geometry — 3
graphic — 2
map-view — 1
reactive-utils — 1

Top ArcGIS modules outside codemod scope:

@arcgis/core/Viewpoint (static-import) — 2

Utah Bikeways / WFRC bike map

A public bikeway finder for the Wasatch Front. @arcgis/core WebMap + MapView with BasemapToggle, Home, and Track widgets, plus @arcgis/map-components custom elements — the modern Esri stack a 2026 migration actually meets.

Author: Utah Geospatial Resource Center (UGRC) with the Wasatch Front Regional Council (government)
Repository: https://github.com/agrc/wfrc-bike-map
Pinned commit: 680bcf88b094866a096db1576f61c254f9792a39
License: MIT — https://github.com/agrc/wfrc-bike-map/blob/680bcf88b094866a096db1576f61c254f9792a39/LICENSE
Observed: 2026-08-04
Scan root: src

filesScanned=26 filesWithArcGisImports=4 importCount=10 esriLeafletImportCount=0 topSymbols=[watch:3, MapView:3, WebMap:3, Basemap:2, BasemapToggle:2, Home:2, Track:2, Graphic:2, esriConfig:1, renderPreviewHTML:1] flags=[auth-or-request-customization-detected, webmap-detected]

Metric	Value
Readiness	`assisted`
Files scanned	26
Files importing ArcGIS modules	4
Codemod-scoped call sites	9
Auto-migrated call-site ratio	77.8%
Manual-rewrite ratio	22.2%
Manual-intervention ratio	30.0%
Widget sites (automated / assisted / manual)	3 / 0 / 0
Widget gate (`--gate 0`)	pass at 100.0% automated

Top manual-TODO kinds:

basemap — 1
map-view — 1

Top ArcGIS modules outside codemod scope:

@arcgis/core/symbols/support/symbolUtils (static-import) — 1

Owls of Bavaria

A citizen-science map of owl sightings in Bavaria sourced from iNaturalist. Small React + Redux + Vite app over @arcgis/core using Map, MapView, FeatureLayer, GeoJSONLayer, Graphic, and client-side FeatureFilter / FeatureEffect.

Author: Lucia Johnson (individual)
Repository: https://github.com/lujoh/owls_of_bavaria
Pinned commit: 284949156925c63b0258aece1f48cd9e4f5ea55d
License: MIT — https://github.com/lujoh/owls_of_bavaria/blob/284949156925c63b0258aece1f48cd9e4f5ea55d/LICENSE
Observed: 2026-08-04
Scan root: src

filesScanned=15 filesWithArcGisImports=3 importCount=8 esriLeafletImportCount=0 topSymbols=[FeatureFilter:2, FeatureEffect:2, Map:2, MapView:2, GeoJSONLayer:2, FeatureLayer:2, Graphic:2, esriConfig:1] flags=[auth-or-request-customization-detected]

Metric	Value
Readiness	`assisted`
Files scanned	15
Files importing ArcGIS modules	3
Codemod-scoped call sites	7
Auto-migrated call-site ratio	85.7%
Manual-rewrite ratio	14.3%
Manual-intervention ratio	25.0%
Widget sites (automated / assisted / manual)	0 / 0 / 0
Widget gate (`--gate 0`)	pass at 100.0% automated

Top manual-TODO kinds:

feature-layer — 1

Top ArcGIS modules outside codemod scope:

@arcgis/core/layers/support/FeatureEffect (static-import) — 1

Does the result still build?

Call-site ratios do not answer that. A separate, separately-gated lane installs a pinned app's real dependency tree, runs the codemod over it, installs the packed compat packages, and builds the result — measuring the same commit twice so only the delta is attributed to the migration. See post-codemod build validation.

Reproducing this page

HONUA_OSS_ARCGIS_CORPUS_ENABLED=true npm run corpus:oss-arcgis
npm run docs:oss-arcgis-corpus

See docs/oss-arcgis-corpus.md for the manifest shape, license policy, and lane guardrails.