@article{fdi:010055792,
  title = {{A}utomatic unmixing of {MODIS} multi-temporal data for inter-annual monitoring of land use at a regional scale ({T}ensift, {M}orocco)},
  author = {{B}enhadj, {I}. and {D}uchemin, {B}eno{\^i}t and {M}aisongrande, {P}. and {S}imonneaux, {V}incent and {K}habba, {S}. and {C}hehbouni, {A}bdelghani},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he objective of this study is to develop an approach for monitoring land use over the semi-arid {T}ensift-{M}arrakech plain, a 3000 km(2) intensively cropped area in {M}orocco. {I}n this objective, the linear unmixing method is adapted to process a 6-year archive of {M}oderate {R}esolution {I}maging {S}pectroradiometer ({MODIS}) normalized difference vegetation index ({NDVI}) 16-day composite data at 250 m spatial resolution. {T}he result of the processing is a description of land use in terms of fractions of three predominant classes: orchard, non-cultivated area and annual crop. {T}he typical signatures of land classes - endmembers - are retrieved on a yearly basis using an automated algorithm that detects the most pure pixels in the study area. {T}he algorithm first extracts typical {NDVI} profiles as potential endmembers, then selects the profiles that have the best ability to reproduce the variability of {MODIS} {NDVI} time series over the study area. {T}he endmembers appear stable over the 6 years of study and coherent with the vegetation seasonality of the three targeted land classes. {V}alidation data allow us to quantify the error on land-use fractions to about 0.10 at 1 km resolution. {L}and-use estimates are consistent in space and time: the orchard class is stable, and differences in water availability (irrigation and rainfall) partly explain a part of the inter-annual variations observed for the annual crop class. {T}he advantages and drawbacks of the approach are discussed.},
  keywords = {},
  booktitle = {},
  journal = {{I}nternational {J}ournal of {R}emote {S}ensing},
  volume = {33},
  numero = {5},
  pages = {1325--1348},
  ISSN = {0143-1161},
  year = {2012},
  DOI = {10.1080/01431161.2011.564220},
  URL = {https://www.documentation.ird.fr/hor/fdi:010055792},
}