< back to presentation overview

Details of the presentation
Presentation Poster presentation
Title Vegetation Type Mapping in North-Eastern Namibia based on Botanical Assessments and Multi-scale Satellite Observations

PDF Download ---
Short title Multi-scale vegetation type mapping in NE-Namibia

Author(s) Hüttich, Ch.(1); Gessner, U.(1); Keil, M.(2); Schmidt, M.(2); Strohbach, B.(3)

Presenting author Hüttich, Ch.

Institution(s) (1) Inst. for Geography, University of Würzburg; (2) German Aerospace Center (DLR), DFD, Oberpfaffenhofen; (3) National Botanical Research Institute, Windhoek

Keywords remote sensing; vegetation density; vegetation structure; vegetation type; botanical assessments; MODIS time series analysis; savannas; Namibia; LCCS

Abstract The evaluation of the recent status of biodiversity, regarding the landscape complexity and spatial heterogeneity in Southern Africa’s savannas, is a major challenge for land management and conservation purposes. There is a need to improve the monitoring mechanisms. The study aims to apply an integrated mapping technique based on recent detailed botanical vegetation characterisations and multi-scale earth observation data.
In-situ land cover information following the FAO’s Land Cover Classification Scheme (LCCS) is used to retrieve information on the vegetation structure (concerning vegetation cover by grass/herbs, shrubs, trees and estimates of bare soil percentages) and major vegetation types. Main field survey input is the information of vegetation plots with the assignment to the specific vegetation type.
Downscaling analyses are applied to combine information on vegetation structure from high resolution satellite data to the level of Landsat and, for large-area coverage, to MODIS time series data with its temporal dynamics. Vegetation type-specific phenology information derived by MODIS NDVI time series from 2000 to 2007 and spectral radiances are used for vegetation mapping. A fuzzy classification approach is applied by using sets of several years of MODIS data.
The study shows first results for vegetation type mapping in the NE part of Namibia, including NE Kalahari Woodlands, Northern and Central Kalahari and parts of Karstveld and the Thornbush Shrublands. By using the fuzzy approach, transition zones of different savanna types and patterns of differing vegetation structure within one vegetation type become evident.

Congress Topic Observation System

Topic No. ---
Notes ---

Ref. No. 559