ArcGIS Maps SDK for JavaScript

Same data, your design,
zero risk to the source.

Any existing ArcGIS Online map can be completely transformed in the browser — new colors, new icons, new filters — without touching, editing, or endangering the original item. Every change below is a client-side render override. The source is never modified.

01

We load the same source

The app opens the exact AGOL item the original uses — same feature layer, same data, same server.

02

We re-style it in memory

Renderer, symbols, popups, filters and definition queries are overridden in the browser only.

03

Nothing is written back

No edits, no save-as, no item updates. Read-only access. The owner's map stays exactly as authored.

04

Security is preserved

Org-private content still requires a named-user OAuth login through Esri's own IdentityManager.

Live demonstrations

Public · No login

FEMA Resilience Analysis & Planning Tool

FEMA Community Resilience Challenges Index — every U.S. county, a public FEMA layer used inside RAPT.

Open the public demo →Red Cross · Sign-in

Red Cross Counties — Population

Red Cross county geography (3,162 counties), re-styled live in your browser after Red Cross sign-in.

Open (Red Cross sign-in) →Red Cross · Sign-in

Red Cross Chapters — Geography

Red Cross chapter boundaries (226 chapters), re-styled with a different palette and filter.

Open (Red Cross sign-in) →Red Cross · Sign-in

FLARE — County Fire Activity

Red Cross FLARE county fire counts (2,914 counties), re-styled live after Red Cross sign-in.

Open (Red Cross sign-in) →Red Cross · Sign-in

Damage Assessments — Standardized

Red Cross standardized DA points (since 6/30/2023), re-styled live after Red Cross sign-in.

Open (Red Cross sign-in) →