[1] CSIR, Earth Observat Grp, Nat Resources & Environm NRE, ZA-0001 Pretoria, South Africa
[2] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA 94305 USA
[3] RIT Ctr Imaging Sci, Digital Imaging & Remote Sensing Grp, Rochester, NY 14623 USA
[4] CSIR, Meraka Inst, African Adv Inst Informat & Commun Technol, ZA-0001 Pretoria, South Africa
[5] Sci Serv, S African Natl Pk, ZA-1350 Skukuza, South Africa
[6] Univ Witwatersrand, Sch Anim Plant & Environm Sci, Johannesburg, South Africa
[7] Univ Pretoria, Ctr Geoinformat Sci, Dept Geog Geoinformat & Meteorol, ZA-0002 Pretoria, South Africa