Time Series of Forage Provision Maps (Green Biomass) covering the Vea Catchment (Ghana, Burkina Faso), 2015-16

The time series of maps is showing three differnt forage parameters (green biomass, metabolisable energy, metabolisable energy yield) from 04.12.2015 to 29.09.2016. The covered area matches the Vea catchment at the border region of Ghana and Burkina Faso.

For model calibration, data was collected during the rainy season 2012 at 21 sites spread along a north-south climate gradient reaching from northern Ghana to central Burkina Faso. Spectral reflectance measurements of vegetation plots were performed using a FieldSpec 3 Hi-Res Portable Spectroradiometer (ASD Inc., Boulder, CO, USA). Partial least squares regression was used to calibrate spectral models between reflectance data and forage characteristics (green biomass & metabolisable energy). Metabolisable enrgy yield was calculated based on the other two forage parameters. For more details regarding sampling design and model calibration, see Ferner, Linstädter et al. (2015).

Sentinel-2 images were acquired for twelve dates. Imagery was atmospherically corrected using the plugin ‘sen2cor’ within the SNAP toolbox, provided by the European Space Agency (ESA).

To assure that forage models were only applied on vegetated areas, a vegetation mask was build based on MESMA (multiple endmember spectral mixture analysis) and only pixels with a fractional cover of green vegetation of more than 30% were used. Finally, forage provision models resampled to Sentinel-2 spectral resolution were applied to obtain maps of estimated forage provision.

Further information:

Ferner, J., Linstädter, A., Südekum, K. H., & Schmidtlein, S. (2015). Spectral indicators of forage quality in West Africa’s tropical savannas. International Journal of Applied Earth Observation and Geoinformation, 41, 99-106.

Simple

Date (Publication)
2017-01-12T16:00:00
Edition
1
Presentation form
Digital map
Purpose
Provide information on forage availability (green Biomass) and development over the dry and rainy season in the Sudanian savanna of West Africa
Status
Completed
Originator
  Center for Remote Sensing of Land Surfaces (ZFL), University of Bonn - Jessica Ferner ( Junior Researcher )
Bonn , 53113 , Germany
+49 (0)228-73-1831
Maintenance and update frequency
Not planned
GEMET - Concepts, version 2.4
  • grazing
  • living environment
  • environment
  • livestock
  • livestock farming
  • overgrazing
  • biotic factor
  • fodder plant
  • fodder
  • vegetation cover
  • vegetation
  • animal nutrition
  • animal husbandry
  • biotope protection
  • semi-arid land ecosystem
  • arid land
  • biomass
  • feeding of animals
Theme
  • forage quality
  • forage quantity
  • time series
  • maps
Region
  • Ghana
  • Burkina Faso
Place
  • Nothern Ghana
  • Southern Burkina
  • Vea catchment
  • Aniabiisi
Access constraints
Intellectual property rights
Use constraints
Restricted
Other constraints
The data is accessible only as WebMapService. In case you want to get access to the data please contact the distributor.
Aggregate Datasetindentifier
b4b63d82-e41f-42f4-b76b-87d8e0120a1a
Association Type
Cross reference
Initiative Type
Study
Aggregate Datasetindentifier
7420303a-0154-4b22-9c22-d4606ba7fd00
Association Type
Cross reference
Initiative Type
Study
Metadata language
English
Character set
UTF8
Topic category
  • Environment
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S
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Begin date
2015-12-04
End date
2016-09-29
Supplemental Information
12 time related layers per green biomass
Distribution format
  • GeoTIFF ( 1.0 )

Distributor

Distributor
  Center for Remote Sensing of Land Surfaces (ZFL), University of Bonn - Jessica Ferner
Ordering instructions
Please contact distributor per email.
OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20151204_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20151224_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160113_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160123_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160212_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160303_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160402_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160422_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160611_rasWASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160611_rasWASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160611_rasWASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160611_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160702_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160919_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

OnLine resource
WASCAL:WSC_remo_green-biomass-forage-prov-time-series_vea-ghana_20160929_ras ( OGC:WMS-1.1.1-http-get-map )

Forage Provision: Green Biomass Time Series

Hierarchy level
Dataset
Statement

Data quality of forage variables modelled from hyperspectral reflectance is:

Model adjR² nRMSE [%]

metabolisable enery 0.56 11.7

green biomass 0.64 11.3
Source
File identifier
fc1f9f9a-b214-48dc-8db0-a64ab4766dcf XML
Metadata language
English
Character set
UTF8
Parent identifier
e69a1f55-222e-4e4c-b329-92eb7523ee7f e69a1f55-222e-4e4c-b329-92eb7523ee7f
Date stamp
2021-03-18T17:17:50
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Author
  - Jessica Ferner ( )
 
 

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Keywords

forage quality forage quantity maps time series
GEMET - Concepts, version 2.4
animal husbandry animal nutrition arid land biomass biotic factor biotope protection environment feeding of animals fodder fodder plant grazing livestock livestock farming living environment overgrazing semi-arid land ecosystem vegetation vegetation cover

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