NIMBO (10m) Traceability Layer

Traceability provides calendar-month metadata associated with NIMBO Basemap. Use it alongside the Basemap catalogue and its separately observed editions.

Traceability classes describe calendar months relative to the requested month M, not exact acquisition dates. The class-assignment rule for pixels interpolated from multiple acquisitions is unknown. NoData and transparency behavior have not been specified.

Technical Specifications

Feature	Details
Service URL	`⚠️ Access for enterprise plan only`
Format	Color-mapped PNG (including palette-indexed images)
Zoom Levels	0 to 18
Coordinate System	Web Mercator (EPSG:3857)
Coverage	Verify the layer, requested area and month
Tile Size	256x256 px

Parameters:

year: Four-digit year (e.g. 2024)
month: Month number (1–12)
layer_name: Basemap identifier. Use 6 for the Traceability Layer (10 m).
z, x, y: TMS tile coordinates for the /mapcache/tms/ endpoint. Rows count from the south; convert an XYZ row using yTMS = 2^z - 1 - yXYZ.
kermap_token: Your API authentication token.

How it works ?

The monthly synthesis interpolates the available and usable Sentinel-2 acquisitions, taking cloud coverage into account, to represent conditions as close as possible to the 15th of the represented month. The 15th is a synthesis target, not the acquisition date of every pixel.

The overlay uses TMS or WMTS. A calendar-month class does not establish an exact acquisition date or guarantee that a detected change occurred within the requested month.

Legend & Symbology

Traceability: calendar months relative to requested month M
Class	Timeframe / meaning	RGBA colour
1	Requested month — M	`rgba(26, 152, 80, 1)`
2	Previous month — M−1	`rgba(145, 207, 96, 1)`
3	Two months earlier — M−2	`rgba(254, 224, 139, 1)`
4	Three months earlier — M−3	`rgba(252, 141, 89, 1)`
5	Four months earlier or more — M−4 and earlier	`rgba(215, 48, 39, 1)`

The legend uses calendar months, not day thresholds. The class-assignment rule for an interpolated pixel is not established.

Global Archive & Monthly Coverage

Traceability is associated with a specific basemap month. Check its own layer inventory: a newer RGB edition does not establish that a matching Traceability edition is already served.

Interpret the classes only where the requested month and area are actually served, within the limitations above. The catalogue records its own verified edition separately from RGB.

Global monthly coverage of the NIMBO 10 m traceability layer — Global monthly coverage of the NIMBO Traceability Layer at 10 m resolution. Check the service inventory and actual response for the requested month and area.

Example: high-precision analysis in Indonesia

The Indonesia illustration shows a Basemap alongside its Traceability colours. Read the colours using the calendar-month legend. This illustration does not establish the acquisition date of each synthetic pixel or validate high-precision change detection.

example NIMBO basemap (10m) — Natural Color illustration in Sumatra (Indonesia)

example NIMBO pixel traceability (10m) — Same area and requested month: colours represent the calendar-month classes in the legend; interpolated-pixel assignment remains unconfirmed

Traceability availability must be checked independently of RGB, for the requested area and edition. Some advertised archive editions returned errors in samples checked on 2026-09-30. Current availability for those editions has not been confirmed.

Monthly editions have an operational publication target of the 15th of the following month. Delays of up to two weeks can occur. This is not a contractual guarantee or evidence that an edition has actually been published.

Service verification

Checked on 2026-09-30. Component 6 is titled date in the service inventory. Recent samples returned the documented color-mapped PNG overlay. A uniform dark-green tile can be a valid current-month class, rather than missing data.

The inventory listed January 2020 onward, but January 2020 and November 2021 sample requests returned HTTP 502. Availability must be checked for the actual month and area; do not assume the full advertised archive is operational.

See the Basemap catalogue record for the latest verified Traceability edition, which may differ from RGB.