Vitenskapelig artikkel   2018

Trier, Øivind Due; Salberg, Arnt-Børre; Haarpaintner, Jörg; Aarsten, Dagrun; Gobakken, Terje; Næsset, Erik

Publikasjonsdetaljer

Tidsskrift:

European Journal of Remote Sensing, vol. 51, p. 587–606, 2018

Utgave:

1

Internasjonale standardnumre:

Trykt: 2279-7254
Elektronisk: 2279-7254

Lenker:

FULLTEKST: www.tandfonline.com/doi/pdf/10.1080/22797254.2018.1461533
DOI: doi.org/10.1080/22797254.2018.1461533

This paper proposes a new method for mapping of forest cover in Tanzania, in the form of yearly estimates of average vegetation height from time-series of Landsat and ALOS PALSAR satellite images. By using airborne laser scanning data and Landsat-8 data from 2014, a regression between average vegetation height and the specific leaf area vegetation index is established. By using all available Landsat acquisitions of the same area within 1 year, and producing a yearly estimate of vegetation height, the estimation error variance is reduced. The variance is further reduced by Kalman filtering the sequence of yearly estimates. A multi-sensor version of the method comprises application of the radar backscatter when L-band SAR data is available. To conclude, we have demonstrated that estimation of mean vegetation height is possible from dense time series of optical and SAR satellite data. Change detection was able to detect areas with total loss of biomass.