# EVE Dashboard User Manual
If historical catalogue discovery fails, Time Analysis keeps operational observations with a visible historical-unavailable notice and **Retry data** action, including on phones. Reports retain operational trends and label the historical omission. This incomplete fallback is not cached; retry can recover the full catalogue-derived series. A known empty catalogue is a successful discovery, not an outage.
Last revision date: 14 October 2026
Nigeria historical data is available on production for 13 dekads from 21 July through 30 November 2024. Reload an already-open page, choose Nigeria and a historical dekad, or open a matching country/dekad link. Overview cards, rankings and Time Analysis show available observations; unavailable observations differ from measured zero and gaps break chart lines. Animation/GIF requires consecutive processed dates and restores the original date after completion or failure. Reports show 24 calendar dekads ending at the selected date. Map/report exports wait for matching layers and retain historical provenance. Historical tabular dataset downloads remain unavailable. Implementation details: [historical integration](../docs/historical_frontend_integration_implementation.md).
Historical pilot loading behavior: selecting a new dekad hides the previous flood image while the matching image loads. If loading fails, the previous image stays hidden; reload the page to try again. The sidebar has no persistent Retry data button; Time Analysis retains a Retry data action when historical discovery fails.
## Contents
- [General Disclaimer](#general-disclaimer)
- [1. Orientation](#orientation)
- [2. Basic Workflow](#basic-workflow)
- [3. Sidebar and Shared Map](#sidebar-and-shared-map)
- [4. Overview Mode](#overview-mode)
- [5. Exposure Model Mode](#exposure-model-mode)
- [6. Mapping Mode](#mapping-mode)
- [7. Time Analysis Mode](#time-analysis-mode)
- [8. Crop Calendar Mode](#crop-calendar-mode)
- [9. Localisation Mode](#localisation-mode)
- [10. Data and Reports Mode](#data-and-reports-mode)
- [11. Field Data](#field-data)
- [12. Sharing and Outputs](#sharing-and-outputs)
## General Disclaimer
The boundaries and names shown and the designations used on this map do not imply the expression of any opinion whatsoever on the part of FAO concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers and boundaries.
Dotted or dashed lines on maps represent approximate border lines for which there may not yet be full agreement.
## 1. Orientation
This guide explains how to use the EVE dashboard interface. For the meaning of indicators and data products shown in the dashboard, use the [EVE Data Reference](manuals/eve_data_manual.md#document-information).
The dashboard is organized around one shared map and a set of mode tabs. The selected country, reporting period, geography, map settings, and URL state carry across modes where applicable.
Main dashboard areas:
- Left sidebar: language, country, reporting period, administrative filters, basemap, and selected mode controls.
- Shared map: flood raster, support boundaries, thematic layers, selected areas, popups, and legends.
- Mode context strip: the current dashboard view and active country, period, and geography.
- Bottom tabs: switch between Overview, Mapping, Time Analysis, Crop Calendar, Localisation, Data and Reports, Exposure Model where available, and Field Data; protected field events require authorization.
- Mode panels: cards, charts, calendars, statistics, report controls, and data-download links.
- `User Guide`: opens the Dashboard Guide directly at the section for the currently active mode. A small `Back to top` control appears after scrolling down the guide.
## 2. Basic Workflow
The app opens with Nigeria selected by default. A shared link specifying another country opens that country instead.
While the map loads, you can choose a public mode or open the User Guide. Your selected mode opens when startup finishes; filters become available then. A loading message appears only if startup takes more than a couple of seconds. If loading takes longer, you can keep waiting or use **Reload page**. If the map cannot start, the guide and mode selection remain available, and **Reload page** retries startup.
1. Select a country in the sidebar.
2. Wait for available reporting periods and administrative filters to load.
3. Use the arrows beside the selected dekad and date range for the previous or next 10-day period, or open `Browse dates` to choose from the full month grid. The latest period is selected by default.
4. Review the map and the active mode panel.
5. Optionally select an administrative area from the sidebar, map, chart, or ranking.
6. Use `Remove selection` beside ADM1 or ADM2 filters to clear a selected area.
7. Switch modes to inspect the same selection through another dashboard view.
8. Export maps, animations, reports, or open data downloads where available.
Mode tabs may appear or disappear depending on the selected country and available dashboard configuration.
Administrative filter labels follow the GAUL hierarchy of the selected country, so they differ from country to country. Myanmar is a special case: GAUL places the three division types (Region, State, Union Territory) at level 1 and the 15 states/regions at level 2, so the first filter is labelled `State/region type` and individual states/regions are selected in the second filter.
## 3. Sidebar and Shared Map
The sidebar is the main place to set the dashboard scope.
Core sidebar controls:
- Country selector, alphabetized by the displayed country name.
- Selected dekad number and reporting-period range with previous/next arrows and an expandable `Browse dates` grid.
- ADM1 and ADM2 filters, when available.
- `Remove selection` actions for selected ADM1 or ADM2 filters.
- Basemap selector.
- Mode-specific controls shown only when relevant.
- Language selector for English or French interface labels in the Preferences section at the bottom of the sidebar.
On narrow screens (820 px wide or less, such as phones, small tablets, or a narrowed browser window), the sidebar is hidden to leave room for the map. Open it with the `Filters` button at the top left; close it with the `✕` button, by tapping outside it, or with Escape. The `?` button beside it opens this guide. The mode tabs at the bottom scroll sideways.
On a phone, Overview shows the summary cards in a row you can swipe sideways to see all four, then the map, then the ranking. Field Data keeps the map fixed at the top (on the left with the phone turned sideways) and scrolls the event cards and report list below it. Tapping a report, in the list or on the map, opens it full screen with a larger photo and its details; use the arrows to move to the previous or next report, and `List` to go back. Mapping, Time Analysis and Exposure Model show the map with their controls below it (or beside it with the phone turned sideways). Every map has a full-screen button under the zoom buttons; tap it again, or change mode, to return. Map export, advanced map classification, Time Analysis animation and GIF export are available on larger screens only; on a phone a short note appears in their place. The map legend starts closed on a phone; open it with the list button on the map. Crop Calendar, Localisation and the PDF report builder are designed for tablets and computers: on a phone they first show a short note with `Continue anyway` (open the full view as it is) and `Back to Overview`. The EVE data download links in Data and Reports work on any screen. `Team access` sign-in opens in a pop-up window, which phone browsers block by default: if sign-in fails, allow pop-ups for this site in the browser settings and try again.
Known non-land source records can be centrally excluded from ADM2 selectors and analytical outputs. In DRC, the Waterbody record under Tanganyika is excluded from selectors, maps, tables, charts, and generated ADM2 report content.
French interface coverage includes the app shell, shared sidebar controls, mode tabs, map-export modal, Overview rankings and KPI card labels, Exposure Model panels, Overview and Mapping ADM2 popup content, Time Analysis chart controls, Crop Calendar panels, Localisation intro/statistics panels, and Data and Reports configuration panels. Generated PDFs and source dataset labels may still contain English text where they come from report templates or upstream services.
The shared map responds to the current sidebar and mode state. Depending on the active mode, users can:
- Inspect the flood raster.
- Click supported administrative areas.
- Open localized ADM2 popups in Overview and Mapping.
- View highlighted selections.
- Compare optional thematic and exposure layers.
- Use map legends to understand the currently visible map layers.
## 4. Overview Mode
Overview mode is the first dashboard view for the selected country, reporting period, and optional administrative selection.
Its four summary cards use short metric headings; the country or selected area appears in the context line above them. On a phone, swipe the card row to see every metric.
Use it to:
- Review the main KPI cards.
- Compare administrative areas in the ranking chart.
- Select an area from the chart or map.
- Open ADM2 popups from the map.
Main interactions:
- Use the sidebar to change country, period, ADM1, or ADM2.
- Use `Show most impacted by` to change the ranking metric.
- Click a ranked row to update the administrative selection and map focus.
- Use `Remove filter` when an ADM2 ranking is filtered by a selected ADM1.
## 5. Exposure Model Mode
Exposure Model is a public, country-conditional mode for exploring potential population and cropland exposure under a static JRC RP20 flood scenario. It appears only where the current exposure dataset has coverage.
The scenario uses flood depth above 0.5 m, WorldPop 2020 population at 100 m, and ESA WorldCover 2021 cropland at 10 m. The optional WorldPop 1 km imagery is contextual only and uses a yellow-green-teal-blue density ramp. The methodology panel links to the JRC flood model, WorldPop, and ESA WorldCover source pages.
> **Important:** this is a static flood-model intersection, not a near-real-time observation. It does not indicate that flooding is occurring or occurred during the selected EVE period. Use it as a preparedness or contingency baseline when satellite observations are unavailable, delayed, obscured by cloud, incomplete, miss a short-lived event peak because of revisit timing, or have uncertain surface-water detection. Model uncertainty and the difference between potential and observed exposure must remain explicit in interpretation.
Main interactions:
- Use `Filter modelled areas` directly below the Country selector in the left sidebar to review country or filtered model level 1 summaries.
- Use the control directly above the ranking bars to sort model Admin2 areas alphabetically, by amount of cropland exposed, or by amount of population exposed. Alphabetical sorting shows each model Admin2 pcode beside its name.
- Select a ranking row or model polygon to zoom and highlight it. The ranking keeps its current scroll position, and the selected boundary remains outlined even when the administrative thematic layers are at `0%`.
- Use the `+` action to compare a second level 2 area. Differences are signed explicitly: positive values use `+` and negative values use a minus sign.
- Open the clearly labelled `Charts` action on a ranking row to compare its population exposure, cropland exposure, population exposure percentage, and cropland exposure percentage rankings with the other model Admin2 units in the current country or ADM1 selection. Each chart identifies the selected area and pcode, value, rank, comparison scope, unit, and axes. Hover a point for its area, value, and rank; click it to select that model Admin2. These charts do not contain EVE observation data.
- Use the transparency sliders in their displayed draw order: EVE 2.0 comparison, combined ADM2 exposure, population-exposed ADM2, cropland-exposed ADM2, cropland at risk, cropland, RP20 flood hazard, and population density. `0%` turns a layer off; there are no separate visibility switches.
- Optionally raise the normal EVE 2.0 observed-flood raster above `0%` for the selected dekad. It is drawn above the static model layers and remains conceptually separate from them.
- Open the public exposure dataset or the linked JRC, WorldPop, and ESA WorldCover source pages.
The current model uses a separate administrative boundary and pcode hierarchy, so its level 1 and level 2 selections do not replace EVE's GAUL selections. When the user chooses an unsupported country, EVE returns to Overview and hides the Exposure Model tab.
## 6. Mapping Mode
Mapping mode is for thematic map exploration. It starts with the flood raster visible and the ADM2 thematic indicator layer off until an indicator is selected.
The Mapping panel contains:
- `Flood raster`: controls flood-raster transparency.
- `Exposure layer`: turns optional exposure layers and flooded-area visual masking on or off.
- `ADM2 indicator layer`: turns on and configures the joined ADM2 thematic layer.
These three layers can be used together or independently. Each one can be turned on or off without forcing the others to change, so users can view only the flood layer, compare floods with an exposure layer, inspect only an ADM2 indicator layer, or combine all three.
Exposure layers show exposed assets or land cover on the map, for example cropland, population or livestock density. ADM2 indicator layers show administrative level 2 values aggregated from the exposure features intersecting the observed flood footprint in the selected reporting period.
Throughout the dashboard and generated reports, `flooded` describes area and cropland, while `exposed` describes population and livestock, including individual species. These labels distinguish observed inundation from the potential presence of mobile people and animals within the flood footprint.
Main interactions:
- Select an ADM2 indicator root, flood scope, and unit.
- Adjust thematic opacity independently from flood-raster opacity.
- Use standard classification, or open advanced controls for color ramp, classification method, and class count.
- Select an exposure layer from the dropdown.
- Use `Turn off exposure layer` to clear the selected exposure layer and mask.
- Use `Extract exposure layer in flooded area` to display the selected exposure layer through the flood mask.
- Export the map as PDF, PNG, or JPG/JPEG using the draggable A3 frame.
## 7. Time Analysis Mode
Time Analysis mode shows change over reporting periods for the current country or administrative selection.
Main interactions:
- Switch the chart scope between country, ADM1, and ADM2 where available.
- Select an ADM1 or ADM2 before using the matching scoped trend tab.
- Switch chart flood scope where the chart offers that control.
- Click a chart point to update the selected period when animation is not running.
- Adjust **Transparency flood extent** under sidebar **Map display** to reveal the basemap beneath the flood layer. This setting is shared with Overview and is frozen during animation/GIF export.
- Use `START ANIMATION` to choose a start and end period by dragging across the chart or clicking two periods.
- Use `EXPORT GIF` to save the selected map animation range.
During animation and GIF export, relevant controls are frozen and the chart marks the period currently shown on the map.
## 8. Crop Calendar Mode
Crop Calendar mode appears only when the selected country has crop-calendar or agroecological-zone dashboard support.
The agricultural calendar is provided by country-specific agroecological zones (AEZ), not by administrative units. For this reason, Crop Calendar mode uses AEZ-based reporting units for flood statistics instead of the normal ADM1/ADM2 sidebar geography.
When no AEZ is selected, the ranking bar chart shows flooded cropland by AEZ. When an AEZ is selected, the map switches to customized ADM2-AEZ intersection reporting units: each feature is the portion of an ADM2 unit that falls inside the selected AEZ. Flood statistics and the bar chart are then reported for those intersection features, using the amount of flooded cropland within each ADM2 portion inside the AEZ.
Main interactions:
- Review the AEZ ranking chart.
- Select an AEZ to focus the map and show the ADM2 portions within it.
- Use the crop calendar panel to inspect crop rows for the selected country or AEZ.
- Use the calendar expand/minimize control when more space is needed.
- Click outside the selected AEZ context where supported to clear the AEZ selection.
When Crop Calendar mode is active, normal ADM1 and ADM2 sidebar filters are hidden and map interaction switches to AEZ-focused behavior.
## 9. Localisation Mode
Localisation mode supports country-specific analysis where additional national or subnational datasets are available. These analyses require dedicated data pipelines and visualizations that go beyond the standard global EVE analysis framework.
At launch, Localisation mode is available for Mozambique. Further country-specific analyses are planned for later stages. In Mozambique, the mode uses land-cover data for Maputo and Gaza provinces provided by FAO's NSL division, and estimates flood impact on that dataset in addition to the standard global analysis.
Main interactions:
- Enter Localisation from the bottom mode tabs when the tab is available.
- Use the localisation map and statistics panel side by side.
- Adjust flood extent and land-cover opacity separately.
- Use `Extract land cover in flooded area` to visually mask local land cover through the selected flood raster.
- Change the localisation geography using the available sidebar choices.
- Sort the statistics table and switch timeline views where available.
- Use the localisation print/report action from the statistics panel.
## 10. Data and Reports Mode
**Data access** separates **Tabular data** (ADM0, ADM1 and ADM2 dataset links) from **Raster data**. For the selected final flood raster, use **Earth Engine script** only in the Raster data group. The dialog identifies the dekad and full selected country, ADM1 or ADM2 polygon. Copy the script or download `.js`, paste it into the [Earth Engine Code Editor](https://code.earthengine.google.com/) and click **Run**. You need Earth Engine access and read permission for the asset.
**Include GeoTIFF export to Google Drive** is unchecked by default. Enable it to add an export of original classification values on the native pixel grid; then start the task in **Tasks** and download the result from Drive. Large exports may produce several files, with nodata outside the selected polygon. EVE does not submit tasks. Historical or other sources without an exact final EE asset reference show an explanation and disable copying/downloading; no other raster is substituted.
Data and Reports mode provides report-generation controls and links to downloadable EVE datasets.
Data download links:
- ADM0 country level.
- ADM1 first administrative level.
- ADM2 second administrative level.
Report workflow:
1. Select country and reporting period in the sidebar.
2. Open Data and Reports.
3. Confirm the report scope.
4. Choose the report options shown in the panel.
5. If the deep-dive section is enabled, choose how many top admin level 1 areas to include. The report selects the areas with the most flooded cropland and adds one page per area.
6. Review the estimated page count.
7. Export the PDF.
8. Monitor progress while data is fetched, maps are captured, and the PDF is assembled.
Historical reports retain their source/event and release reference, but omit partial-coverage labels, observed-area percentages and dagger symbols. Available trend points use the same marker; unavailable observations remain gaps.
The report scope defines whether the report focuses on all observed standing water in the selected period, or only on the portion considered exceptional for that time of year based on the VISTA flood reference. For more information on the methodology and thresholds used to separate expected seasonal flooding from exceptional flooding, see the [EVE Data Reference VISTA methodology](manuals/eve_data_manual.md#step-3--comparison-with-the-vista-monthly-seasonal-frequency-reference).
## 11. Field Data
Field Data reviews near-real-time field observations, assessments, map locations, and photographs. The EVE tab appears only after approved DIEM Community sign-in, and both available operational events require it.
Interested users who need protected-event access submit a request through the [Contact us form](https://survey123.arcgis.com/share/d644c40b9aa14515a1b25d1297d4ebd7). Approved DIEM Community group members see the additional protected event cards.
1. Select **Team access** and sign in with an approved DIEM Community account.
2. Open **Field Data** and select Madagascar or Mozambique.
On the event-card screen, the sidebar dekad, administrative-area, and basemap selectors are disabled. They become available according to the selected event after it opens; Country remains fixed by the event.
3. EVE presents all authorized event cards but does not load observations until a card is selected.
4. Current choices are Madagascar's February 2026 cyclones and the January-February 2026 Mozambique floods. Nepal is hidden from the event cards and dropdown pending operational data. The selected event can still be changed from the workspace header.
5. EVE selects the country and dekad containing the earliest submitted point for that event. A temporary notice explains the selection; use the standard dekad calendar to compare the flood map before and after that period.
The shared Country selector is disabled while Field Data is open because the selected field event controls that country context.
6. Review the summary cards and filter the chronological feed by observation type, **Only reports with photos**, or **Only reports in map view**. The map-view filter refreshes the feed after each pan or zoom and combines with the other active filters.
7. Select an observation in the feed or on the shared EVE map. The corresponding point, field assessment, and available photographs appear together while the normal EVE basemap and dekad flood layer remain visible.
8. Use **Refresh** for an immediate update; the active mode also refreshes automatically. Select **Sign out** when finished on a shared device.
Field observations are shown once a reviewer has approved them for release; Nepal reads a filtered, published-only service. Access to the interface does not override ArcGIS sharing. The unfiltered legacy Nepal results service was closed on 31 August 2026.
Country-office users for Madagascar and Mozambique can receive a fixed-event `field-data.html?event=` link. Nepal uses only the validation and public apps; its former fixed-event operational URL still opens the public app.
The separate public URL `field-data-public.html?event=nepal-2026` requires no account and shows only Nepal reports explicitly approved for publication. It includes the map, filters, details, approved photographs, and any reviewed public note, but no operational event selector or validation controls. These remain individual field observations rather than representative sampling or official damage estimates.
In the Nepal validation app, an amber lock ribbon identifies the restricted validation workspace. The map opens on the fixed UNOSAT affected area. The top refresh banner shows the five-minute countdown; use it to pause/resume automatic updates or refresh immediately. Refreshing updates the reports without changing the current map extent. The masthead opens the public app in a new browser tab while preserving the selected language.
The public Nepal app uses a matching FAO-blue globe ribbon labelled **Public reports**, making the access context immediately distinct while retaining the same EVE Field Data masthead and analytical layout.
The validation and public apps both provide a **Basemap** selector with Satellite, Topographic, OpenStreetMap, Streets, and Light Gray choices. Changing it does not move or zoom the map.
Both Nepal apps offer English and Nepali. French remains implemented but is hidden from their language selectors. In Nepali, the assessment questions and coded answers use the terminology published in the Nepal Survey123 questionnaire; changing language preserves the current Nepal URL context. Nepali is not currently offered as a language for the rest of the EVE dashboard.
Review statuses distinguish workflow state: **Pending** means nobody has made a review decision; **Needs changes** means the record requires a specific correction or clarification; **Deferred** means a reviewer has postponed the decision, commonly while awaiting context or verification, without necessarily asking the submitter to change anything. The validation panel includes the same guidance in an expandable note.
## 12. Sharing and Outputs
The guide and PDF exports may show a loading state on first use. If loading or export fails, use **Try again** where offered; Data and Reports displays an error and lets you export again.
EVE supports several output paths:
- Share the current dashboard state using the browser URL.
- Export Mapping mode maps as PDF, PNG, or JPG/JPEG.
- Export Time Analysis map animations as GIF files.
- Export structured Data and Reports PDFs.
- Print Localisation reports where configured.
- Open data download links from Data and Reports.
- Open the public model source from Exposure Model.
- Share this guide or the EVE Data Reference with people outside EVE: in the User Guide, use **Copy shareable link** or **Open in new tab**. The public pages are `https://diem-eve.apps.fao.org/dashboard-guide` and `https://diem-eve.apps.fao.org/data-manual`; add a section anchor, for example `#core-fields`, to link to one section.
URL sharing preserves mode, period, geography, and many mode-specific settings. Temporary interface state, such as an in-progress animation range selection, is not stored in the URL.
### Embedding EVE in another website
Partner sites can show a simplified EVE map inside their own pages by adding `embed=1` to the link, for example `https://diem-eve.apps.fao.org/?embed=1&adm0=NGA`.
- `adm0` is the country's ISO3 code. Always set it; without it the map opens on Nigeria.
- `period` is optional. Without it, or when the requested dekad is not published, the map shows the latest available dekad.
The embedded view shows the Overview flood map with its legend and a small card naming the country and dekad. It has no filters, mode tabs, sign-in or panels. **Open full EVE ↗** opens the same view in the full platform in a new tab.
For a regional camera, use `?embed=1®ion=africa`. This opens over Africa without ADM1/ADM2 outlines, area selection or map popups; national and disputed borders remain visible. The legend starts open on frames wider than 820 px and collapsed on narrower frames. Pan and zoom remain available.
The regional card names Africa and the dekad. Historical reconstructions explicitly state their country-only coverage; blank areas elsewhere do not mean no flooding. Nigeria remains the default for date discovery and the full-app link, unless `adm0` specifies another country. **Open full EVE ↗** opens that country and dekad in the full app, which has no regional view. Existing country embeds are unchanged.
## Flood seasonality — 2026-10-15
For Nigeria and Bangladesh, the **Flood seasonality** tab appears immediately after Time analysis. It shows VISTA's historical flood frequency for published recurring dekads. The **Baseline window** and sidebar **Observed period** are independent while the observation overlay is off. Check **Overlay observed water** above the greyed observation selector to compare. Both dekad selectors then stay synchronized while retaining the selected observation year. For Nigeria, all 36 central dekads are configured, from January dekad 1 through December dekad 3 (`01d1`–`12d3`). Each selects a rolling three-dekad window: for example, September dekad 1 covers 21 August–20 September. The final December slot covers 11 December–10 January, crossing the year boundary. The publisher reports these layers private; public sharing is required before anonymous users can display them. Arrow keys skip unpublished slots and stop at the ends; Home/End select the first/last available slot.
The main left sidebar contains a compact **Flood seasonality** card below the country/period/admin filters. The baseline starts at 80% opacity; the observed EVE water overlay starts off, with its date and opacity controls disabled. Enabling it restores the last visible opacity (60% initially); disabling it remembers the setting. Each date sits above its own slider. Expand **Info on this baseline** for interpretation notes and the [VISTA reference](https://vista-review.web.app/). Missing observations show an availability message while keeping the requested date/year and the VISTA selection. The legend opens when entering this mode. Country/admin filters retain their normal map behavior. Reloading restores the baseline choice, overlay checkbox and non-default opacities from the URL. A failed reference load offers **Retry**. The map fills the remaining width. The baseline calendar sits in a dock below the map controls. The source-credit strip is currently hidden across all modes. The Flood seasonality legend wraps long labels and scrolls vertically when needed. Expand **What is VISTA?** in that dock for a short explanation and a link to the VISTA site. The desktop User Guide sits in the top bar for this mode. On phones, open **Filters** for the same controls and scroll the calendar horizontally; the dock remains available in fullscreen.
Frequency is the share of valid historical years with flooding, with a denominator that varies by pixel over roughly 14 years. It is not a forecast or probability. Transparent zero values also include ocean and areas without observations, so they do not establish absence of risk. The current **rolling monthly** reference uses the preceding, central and following dekad, matching EVE's reference-window convention. EVE applies a frequency of at least 25% for its seasonal rule; the baseline itself is historical context, not an observation. No pixel identify or baseline export is provided.
Read the baseline legend from light purple (less frequent) at the bottom to dark purple (more frequent) at the top. The continuous scale marks 0%, 25%, 50%, 75% and 100%; captions near its ends explain frequently and rarely flooded at this time of year. 100% means flooding in every valid year. The dashed 25% marker identifies EVE's seasonal threshold. Zero and areas without observations are transparent. This simpler legend leaves the map colours and classification unchanged; an enabled observed-flood overlay retains its own key.
### Bangladesh monthly coverage — 17 October 2026
Bangladesh has all 36 monthly rolling references, January dekad 1 through December dekad 3 (01d1–12d3). The second half was added on 17 October 2026. The same controls, purple legend and optional synchronized observed-water overlay apply. Nigeria retains all 36 slots. The publisher reports the Bangladesh items private; this configuration does not change sharing.
### Layer order and current-period marker — 19 October 2026
In Flood seasonality, observed-water transparency controls and legend entries precede the VISTA baseline, matching map stacking. The baseline calendar outlines the latest published observation dekad and labels its full date range as Current period (latest published). This marker is independent of the selected historical baseline and observation year. It comes from the newest valid catalogue period with imagery, not the wall clock or the final VISTA slot. Empty/failed catalogue discovery shows no marker. Reload the page after publication to refresh the session-cached catalogue; re-entering the mode reads that catalogue again. The same behavior applies to Nigeria and Bangladesh, with English/French labels.
### Future baseline observations — 19 October 2026
With Overlay observed water enabled, a requested observation later than the newest published imagery falls back to the same dekad one year earlier only when that observation has imagery. The actual year appears in the observed-period date and a Previous year explanation. A missing previous-year observation retains the unavailable message; no older year is searched. Choosing a current-year available baseline after an automatic fallback returns to the reference year. Baseline selection and the Current period marker retain their own dates. Flood seasonality now follows Time analysis in the mode bar.
When Overlay observed water is enabled, the calendar caption shows the requested observation dates and actual year, with Previous year for a fallback or an unavailable label when missing. With the overlay off it shows the latest published observation date. The outlined current-publication slot and its tooltip continue to identify catalogue availability independently of the selected comparison. Verified October dekad 2 fallback against the real EVE_floods_202510d02 raster: selector, sidebar and calendar caption all show 11–20 October 2025.
The baseline information credits VISTA (VIIRS Surface Water Temporal Atlas) to FAO and the European Commission’s JRC, explains its NOAA/VIIRS historical observations, and links separately to the VISTA site and the frequency-product methodology. The same information is available in French.
The latest-published calendar slot now has a visible Current badge (Actuelle in French), a tinted background and a stronger outline. The selected baseline retains its solid fill. Calendar footer space is reserved for the badge in desktop, phone and fullscreen views.