Remote sensing observations of continental surfaces set coordinated by André Mariotti ; edited by Nicolas Baghdadi Mehrez Zribi ; [3]: Land surface remote sensing in agriculture and forest Mapping of Primary Soil Properties Using Optical Visible and Near Infrared (Vis NIR) Remote Sensing Cécile Gomez and Phillipe Lagacherie. Introduction ; Spectral signatures of soils ; Estimation of soil properties from their spectral signatures ; Direct uses of estimation models ; Use of the Vis NIR remote sensing products for digital soil mapping ; Perspectives ; Key points ; Bibliography