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About
Clear, consistent thumbnails help users recognize ArcGIS Online items before they click. This tool builds them to City of San Diego design standards. Templates cover City departments (Stormwater, Transportation) and SanGIS, the San Diego regional GIS agency.
On item thumbnails, the vertical band on the right (the "sidebar") labels the ArcGIS item type — Web Map, Dashboard, Survey, and so on — so people can identify content at a glance.
City Design Standards: sandiego.gov/communications/design
Query Parameters
Add any of these to a page's URL to preconfigure it. The "Copy link" button on each builder generates one of these URLs for you. Parameters marked item apply only to the Item Thumbnail page.
| Parameter | Applies to | Description | Values | Example |
|---|---|---|---|---|
| background | both | Background image URL | URL | https://path.to/background.jpg |
| logo | both | Logo image URL (transparent PNG recommended) | URL | https://path.to/logo.png |
| title | both | Title text | String | My Title |
| titleColor | both | Title bar color | r,g,b,a | 0,152,219,0.9 |
| category | item | Sidebar label (ArcGIS item type) | String | Web Map |
| sidebarColor | item | Sidebar color | r,g,b,a | 255,160,47,0.9 |
| logoScale | both | Logo size multiplier (default 1) | Number | 1.6 |
| logoStroke | both | White outline width in px for busy backgrounds (default 0) | Number | 1.5 |
| theme | both | Force light or dark mode | light | dark | dark |
See Example:
Contact
Questions or suggestions? Please open an issue in the COSD fork: cosd-arcgis-thumbnail-builder.
Attribution
This project is a fork of ArcGISThumbnailBuilder by Joshua Tanner (Oregon Geospatial Enterprise Office). All credit for the original concept and implementation goes to the original author. The City of San Diego customization focuses on organizational design standards.