A digital story map is accessible when its essential story remains understandable and usable without sight, a mouse, or a particular sensory ability. The map may still be the visual centerpiece, but it cannot be the only place where the meaning lives.
Build an equivalent text narrative, describe meaningful visuals, make every interaction keyboard-operable with visible focus, name controls clearly, announce important dynamic changes, and test the published experience with a keyboard and screen readers. Apply those checks to the live story map, not only to the authoring view.
What accessibility means for a digital story map
A map is visual content. A screen-reader user may hear the page structure and its text, but will not automatically receive the geographic pattern, sequence, comparison, or change that a sighted reader gets from the map. Accessibility therefore requires more than adding one alternative-text label.
The practical standard is equivalent purpose: a reader who cannot see or point at the map should still be able to learn the information the map is meant to communicate and complete the same meaningful tasks. The W3C’s legacy Web Content Accessibility Guidelines 1.0 called for text equivalents for non-text content. That document is historical guidance, not a current conformance standard, but its principle remains useful when planning a story.
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For an accessible map, provide:
- Readable text that conveys the map’s essential geographic message.
- Alternative text for images and other visual media when the publishing system supports it.
- Keyboard access to navigation, buttons, panels, media controls, and map-related content.
- A visible focus indicator and an order that makes sense as a person moves through the story.
- Control names that say what each control does.
- Announcements or other status information when an interaction changes content in a way a screen reader would not otherwise detect.
- Testing on the published URL with keyboard-only navigation and screen readers.
Start by identifying what the map is saying
Do not begin with an alt-text box. First decide what a reader must understand after viewing the map. The answer depends on the story, not on the map’s software.
Find the essential message
Ask whether the map communicates a central pattern, specific locations, a sequence, a comparison, or change over time. A map showing the spread of an event may need a statement about where the concentration increases and in which direction it moves. A route story may need the ordered places and the reason each stop matters. A comparison may need the values or relative differences that the visual symbols encode.
Write that information in the story itself, near the map or in a clearly associated section. Readers should not have to infer a conclusion from color, size, position, or animation alone.
Choose the right text structure
A short sentence can cover a simple visual. A complex map often needs a longer description, a list of places, a sequence of steps, or a small data table. Use the structure that preserves the information a reader needs, rather than forcing every map into one paragraph of alt text.
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| What the map carries | Useful equivalent content |
|---|---|
| Central geographic pattern | A concise statement of the pattern and the locations involved. |
| Important locations | A readable list of places with the relevant detail for each. |
| Sequence or route | An ordered list that follows the route and explains meaningful stops. |
| Comparison | Text or structured data identifying the items compared and the difference that matters. |
| Change over time | A time-ordered description of the important changes, with dates or periods when they are part of the story. |
This is an editorial application of equivalent-purpose guidance. There is no single required format for every complex map; the correct format is the one that exposes the same important information in a readable, navigable form.
Write useful alternative text for visual media
Describe purpose, not appearance alone
Alternative text should tell a person what the visual contributes to the story. “Map” is only a label. It does not explain what the map shows, why it is present, or what conclusion the reader should draw.
For a simple static visual, identify the subject and its relevant message. For example, a description might explain that a map shows a concentration of sites along a particular corridor, if that concentration is the point of the scene. Avoid decorative details that do not help the reader understand the story.
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Do not duplicate surrounding text
Read the caption, heading, and nearby prose before writing alternative text. If the surrounding text already provides a complete equivalent, the alternative text can be brief and identify the visual’s role. If the visual adds information that the prose does not contain, include that information or provide it in an adjacent structured description.
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A single alternative-text field is often too small for a map with many locations, layers, or time steps. Keep a concise description in the media setting, then place the detailed equivalent in ordinary story text, a list, or another structured presentation. Make the relationship obvious with a heading or sentence so a screen-reader user can find it without guessing.
Apply the same rule to every visual
Photographs, diagrams, screenshots, video thumbnails, and decorative graphics also need a decision. Add relevant alternative text when the item conveys information. Mark an item as decorative only when removing it would not remove meaning, context, or a necessary action. Do not use an identical sentence for every image simply because the platform offers one field.
Make the story operable without a mouse
Use the keyboard as a complete navigation method
Navigate the published story using only a keyboard. Use Tab to move forward and Shift+Tab to move backward. Activate controls with the keyboard command supported by the interface, commonly Enter or Space. Verify that you can reach the story’s navigation, expanders, media controls, links, and any map-related content without touching a pointer.
Older W3C techniques for image maps make the same underlying point: an action associated with a visual region must have a non-pointer way to reach and activate it. A keyboard user should not be trapped in a map, skipped over a control, or forced to operate a hidden visual hotspot.
Keep focus visible
At every step, identify which element has focus. Esri’s StoryMaps guidance describes standard keyboard navigation and a colored focus ring. The exact appearance can change with a theme or release, but the requirement is stable: the focused link, button, field, or other control must be visually distinguishable from its surroundings.
Do not remove a browser or platform focus outline unless you replace it with an equally clear indicator. Check focus against photographs, dark map tiles, and colored panels, where a subtle ring can disappear.
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Use a meaningful focus order
The order should follow the story’s reading and action sequence. A reader should encounter a heading, its explanatory text, and then the related control or media rather than jumping unpredictably to a distant widget. The W3C WCAG 3.0 page discusses meaningful focus order and control names, but WCAG 3.0 is a working draft, not a final conformance standard. Treat those ideas as design guidance and verify the behavior in the actual interface.
Name controls so their purpose is obvious
Visible labels and programmatic names should communicate what a control does. “Open,” “More,” or an unlabeled icon may be ambiguous when heard out of context. Prefer names such as “Open route details,” “Play historical timeline,” or “Show the text description,” provided those names accurately match the action.
Give repeated controls enough context to distinguish them. If several scenes each contain a button labelled “Explore,” include the subject in the name or nearby heading. Ensure that the name a screen reader announces matches the visible purpose; a control that says it will open a gallery should not silently launch a map layer.
Use native buttons, links, headings, and form controls where the platform provides them. Add custom accessibility attributes only when the native element cannot express the behavior. Incorrect or excessive ARIA can produce announcements that are less understandable than the original interface.
Expose changes in interactive maps
Some stories update a title, result count, selected place, chart, or description after a user activates a control. A sighted user may notice the change immediately, while a screen-reader user may hear nothing if focus stays on the original button.
Decide which changes need announcement
Announce changes that provide necessary context or confirm the result of an action. Examples include the name of a newly selected location, the status of a filter, or a message that a requested layer has loaded. Do not announce every visual movement or repeatedly read unchanged content; excessive announcements make the story difficult to follow.
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Esri’s 2024 technical material describes ARIA live regions as one way to convey dynamic content changes. A live region can expose a short status message without moving the user’s focus, but its politeness, scope, and update frequency must fit the application’s behavior. Test what the chosen screen reader actually announces. Do not add a live region as a checkbox exercise, and do not use it to compensate for a control that lacks a proper name or keyboard behavior.
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Keep the updated content available in text
If an interaction changes the map’s meaning, make the resulting information available in the story’s text or an accessible status area. A visual highlight that never appears in the accessibility tree is not an equivalent explanation.
Applying the workflow in ArcGIS StoryMaps
ArcGIS StoryMaps has platform-specific guidance for alternative text and keyboard behavior. Authoring controls and published output can change between releases, so use the current interface labels you see in your account and verify the live story after publishing.
- Inventory the story. List every map, image, video, button, link, panel, timeline, and other interactive element. For each map, write down the information a reader must learn from it.
- Author the equivalent narrative. Place the essential geographic message in the story’s readable text. Add a list, sequence, or structured detail when a short sentence cannot carry the map’s information.
- Open each visual’s accessibility setting. In the StoryMaps authoring interface, locate the alternative-text control for the image or other media. Enter a purpose-focused description rather than a file name or the single word “map.”
- Check complex media separately. If a map has many features or states, keep the concise alternative text and add the full explanation in nearby story content. Confirm that the detailed text is reachable in the published reading order.
- Review every interaction. Tab through the story, operate controls, and watch for a visible focus ring. Confirm that focus does not disappear behind a panel, become trapped in an embedded map, or jump to an unrelated section.
- Verify names and updates. Listen to controls with a screen reader and check that selected locations, filters, loading messages, and other important changes are exposed when they occur.
- Publish and retest. Test the public story, not just the editor. Repeat the checks after substantial content edits, theme changes, embedded-map changes, or platform updates.
Test the published story with keyboard and screen readers
Keyboard-only test
- Reload the published page and begin without a mouse or trackpad.
- Press Tab repeatedly and note whether the focus indicator is visible on every interactive element.
- Compare the focus order with the story’s intended reading order.
- Activate each control with the keyboard and confirm that its result is reachable and understandable.
- Use Shift+Tab to move backward and check that no control becomes unreachable.
- Look for keyboard traps, skipped links, focus that moves behind an overlay, and interactions that work only with pointer gestures.
Screen-reader test
Esri’s web-mapping material names NVDA, JAWS, and VoiceOver as examples for testing. Choose the screen reader appropriate to the operating system and audience, then perform the same story from start to finish.
- Navigate by headings and landmarks to confirm that the story has a usable structure.
- Listen to each image’s alternative text and decide whether it conveys the visual’s purpose.
- Listen to links, buttons, and icon controls out of surrounding context; their names should still make sense.
- Activate map-related controls and confirm that the resulting content is announced or otherwise available.
- Locate the equivalent text for every complex map without relying on visual clues.
- Check that focus remains understandable after dialogs, panels, media playback, and dynamic updates.
Screen-reader output varies with browser, operating system, platform release, and settings. A result that sounds correct in one combination is not proof that every user will hear the same thing. Record the combinations used by your audience and repeat the test when the story or its components change.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common failures and practical fixes
Failure: the map has only “map” as its description
Fix: State the map’s purpose and essential message. Add nearby prose or structured detail for locations, sequence, comparison, or change that cannot fit in a concise description.
Failure: the story explains the map visually but nowhere in text
Fix: Move the conclusion or key data into the narrative itself. Treat visual styling as an additional presentation, not the sole carrier of meaning.
Failure: a user can tab to a control but cannot tell what it does
Fix: Replace ambiguous or icon-only labels with names that describe the action and subject. Ensure the announced name matches the visible label and result.
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Failure: focus disappears on a map or dark image
Fix: Restore the platform’s focus indicator or provide a clearly contrasting replacement. Test across the story’s actual backgrounds and themes.
Failure: focus order feels random
Fix: Reorder the underlying content and controls so keyboard movement follows the narrative. Avoid visual rearrangement that leaves the programmatic order behind.
Failure: a filter changes the map but the screen reader says nothing
Fix: Expose a concise status update or the changed result through an appropriate live-region pattern, then test the announcement with the target screen readers. Keep focus on the user’s control unless moving it is necessary for the task.
Failure: the editor passes, but the published story does not
Fix: Retest the public URL. Publishing can alter embeds, focus behavior, loading states, or the availability of text. Treat the published experience as the product readers receive.
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Maintain accessibility as the story evolves
Accessibility is an editorial and engineering responsibility throughout the story’s life. Keep a small inventory of maps, media, controls, equivalent descriptions, and dynamic states so a later edit does not silently remove one of them.
- Recheck alternative text whenever the visual or its purpose changes.
- Update the equivalent narrative when data, locations, dates, or the story’s conclusion changes.
- Retest keyboard focus after changing themes, layouts, embeds, or custom components.
- Retest screen-reader announcements after changing filters, timelines, pop-ups, or dynamically loaded content.
- Confirm current ArcGIS StoryMaps documentation and interface behavior after platform updates rather than relying on an old conformance report.
Esri’s 2021 StoryMaps conformance report is product-specific and dated; it cannot establish accessibility for every current release or feature. Current platform guidance is useful for locating controls, but the published story’s observed behavior is what readers experience.
Standards context and a useful principle
Use modern accessibility requirements and your audience’s testing expectations when setting acceptance criteria. The historical WCAG 1.0 material cited for text equivalents should not be presented as the current standard. Likewise, the W3C WCAG 3.0 page is a working draft, not a final Recommendation. Its discussion of control names and meaningful focus order is still a helpful design lens, but it does not replace the conformance framework your organization has adopted.
“Users who are blind can use screen reader technology to render all text information in a page.”
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The sentence describes why an equivalent text narrative matters: text can be rendered through assistive technology, while a visual-only message cannot. Build the story so that the map enriches that narrative rather than withholding it.
Quick Recap
Final pre-publication checklist
- The map’s essential message is present as readable text.
- Complex geographic details have a list, sequence, comparison, or other structured equivalent where needed.
- Every informative visual has purposeful alternative text, and decorative visuals do not carry meaning.
- All links, buttons, media controls, panels, and map-related actions work from the keyboard.
- Focus is visible and follows a meaningful order.
- Control names remain clear when heard without surrounding visual context.
- Important dynamic changes are available to assistive technology without disruptive or excessive announcements.
- The published story has been checked with keyboard-only navigation and an appropriate combination of NVDA, JAWS, or VoiceOver.
- The checks are repeated after significant content, component, theme, or platform changes.
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