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ReCover Products

A Service Level Agreement between the subscriber and the service provider defines which products will be provided by the service. The service provider specifies the data, methods and processes used to provide the end product. Typical user-defined products include

  • forest cover and general land cover composition
  • biomass
  • degree of disturbance

and the apparent changes of those variables from the early 1990’s until today. Some examples of products and original image mosaics are shown below.

Low-resolution examples of selected typical deliverables from two study sites.

Forest monitoring on five study sites

The empirical forest monitoring is performed on five study sites for the local users: the Chiapas state in Mexico, a sub-region of Colombia, the entire Guyana, a selected site in the Democratic Republic of the Congo (DRC), and the territory of Fiji islands. The image data are available since the early 1990’s from Landsat Thematic Mapper, Spot 4 and Spot 5, RapidEye, GeoEye, Kompsat 2, Quickbird 2, ERS-1&2, Envisat ASAR, ALOS PALSAR and AVNIR-2 instruments, depending on the site and target year of image interpretation.

Forest cover and biomass products of good quality

During the first iteration of ReCover the accuracy assesment was performed on three test sites. The achieved accuracy in forest/non-forest classification varied from 85% to 91% with optical satellite imagery as input data. With space borne SAR data the accuracy varied between 75% and 88%. The biomass prediction model was unbiased with respect to the ground data but the accuracy at plot level was low. The results will be published in more detail after evaluation of the products by the users. Some elements of image interpretation methods and techniques are already covered in corresponding publications of the ReCover project.

Elements of production: (a) Landsat TM image 1994, (b) RapidEye image 2009, (c) change map 1994-2009 with forest removal shown in red, (d) forest biomass map 2009, with maximum prediction 184 t/ha. Area size 2.7 km by 2.9 km.

Easy user access through WebGIS

Users can access the delivered products using the specially developed WebGIS platform. The ReCover Toolbox 1.0 is a web application that can be used with browser. Registered users can access and browse the ReCover project products with the purpose of their visualization and download.

An example of user interface for the developed WebGIS, with selected product visualized on the map.


Contact

Tuomas Häme
Research Professor
Tuomas.Hame@vtt.fi