An annual classification of your administrative area from high-resolution multispectral imagery, with a mapped change layer against last year's edition.
Spec
The full extent of your boundary in five classes: built-up, cropland, forest, water and bare. One value per class, keyed to the legend. Delivered once a year as a new edition, clipped to your administrative boundary and ready to overlay on your cadastral layer.
built-upcroplandforestwaterbareWhat changed since last year's edition, mapped as polygons with the old class and the new class on each. Built so the change review can start from the list of changes and not from a full re-read of the layer.
Every class written down: what counts, what does not, and where the boundary cases fall. Short enough for a downstream team to cite when they quote an area figure from the layer.
The imagery dates used for each part of the area, the areas that could not be finished from a clear scene and why, and the scheme version the edition was built to.
You send
We do
Comes back
You send
Your administrative boundary as a shapefile or GeoPackage, and your class scheme if you have one. If the layer is for part of the country, send that part.
We do
Before any mapping we compare your scheme with the five-class layer and tell you where a class maps across cleanly and where it does not.
The best usable multispectral imagery for the year is chosen, and each pixel group is classified against the agreed scheme and segmented into patches.
The new edition is compared with the previous one and the differences are mapped as the delta layer.
Comes back
Layer, delta, legend and notes, in a format that opens in QGIS or ArcGIS. The next edition repeats from step three.
Classification has been let as separate contracts: one region, then a themed re-run, each with its own legend. Planning, environmental reporting and the statistics office each keep the extract they trust. When two departments publish different cropland or forest areas for the same year, the GIS lead is asked which one is official, and the honest answer is that they were built to different schemes.
The layer is built to a defined scheme, and yours can be discussed before work starts. The scheme check in step two tells you where it maps across and where it does not.
Send your reference sample at scoping. The layer is delivered in a format that lets you compare it in your own GIS, and thematic accuracy is assessed against what you hold.
Each area uses the best clear imagery for the year. Areas that finish late or from an earlier date are listed in the edition notes.
No. It is one edition a year, and it is not a monitoring feed.
Yes. The edition is clipped to the boundary you send, which can be a region or a single administrative unit.
A format that opens in QGIS or ArcGIS, in the projection your agency uses. Tell us both at scoping.
Use and ownership terms for the delivered layers are written into the contract before work starts. The satellite archives the imagery comes from keep their own licences.
Each edition is scoped and quoted on its own, from the area covered and the number of editions you want. You get a written scope to take through your agency's procurement.
Send the boundary and your class scheme, and we will scope an edition.