Limpopo National Park (Mozambique) Soil Organic Carbon study

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Dr. Arrmindo Henrique Cambule

Publication_Date: 20130629

Title: Limpopo National Park (Mozambique) Soil Organic Carbon study

Geospatial_Data_Presentation_Form: tabular digital data; vector digital data

Publication_Information:

Publication_Place: Enschede, the Netherlands

Publisher: University of Twente

Online_Linkage: doi:10.4121/uuid:6cb98f84-f0de-47d4-8a2c-d6aaeaf5db08

Description:

Abstract:

410 field observations of topsoils in Limpopo National Park (Mozambique), 128 of which were analyzed by wet chemistry for ph, soil organic C, sand, silt, clay; all of which have predicted soil organic C concentration by lab. spectroscopy calibrated with lab. analysis

Purpose:

From a study to assess soil organic C stocks in the Park
References:
Cambule, A.H., 2013. Assessment of soil organic carbon stocks in the Limpopo National Park : from legacy data to digital soil mapping. PhD thesis, University of Twente. Available at <http://www.itc.nl/library/papers_2013/phd/cambule.pdf>.
Cambule, A.H., Rossiter, D.G., Stoorvogel, J.J., and Smaling, E.M.A., 2012. Building a near infrared spectral library for soil organic carbon estimation in the Limpopo National Park, Mozambique. Geoderma 183–184, 41–48. DOI 10.1016/j.geoderma.2012.03.011
Cambule, A.H., Rossiter, D.G., and Stoorvogel, J.J., 2013. A methodology for digital soil mapping in poorly-accessible areas. Geoderma 192, 341–353. DOI 10.1016/j.geoderma.2012.08.020

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 200907

Ending_Date: 200909

Currentness_Reference: ground condition

Status:

Progress: complete

Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 31.52946

East_Bounding_Coordinate: 32.51959

North_Bounding_Coordinate: -22.54918

South_Bounding_Coordinate: -23.93755

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: soil organic carbon

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Limpopo National Park, Mozambique

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dr. Armindo Henrique Cambule

Contact_Organization: Eduardo Mondlane Univeristy

Contact_Address:

Address_Type: mailing and physical address

Address:

Faculdade de Agronomia e Engenharia Florestal Universidade Eduardo Mondlane Campus Universitario principal, Edifício nr. 1 CP

City: Maputo

State_or_Province: MPM

Postal_Code: 257

Country: Mozambique

Contact_Voice_Telephone: +258 21 492177/8

Contact_Electronic_Mail_Address:

armindo.cambule@uem.mz armindo.cambule@gmail.com

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Attributes directly entered by researcher

Logical_Consistency_Report:

All observations collected in one campaign and analyzed in the same laboratory

Completeness_Report: Complete

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: single-receiver GPS

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 5

Horizontal_Positional_Accuracy_Explanation: estimated from GPS receiver reports of positional errors

Lineage:

Process_Step:

Process_Description:

Field sampling, measurment of A horizon thickness and location, description of contrasting soil layers, description of surrounding land use

Process_Date: 200909

Process_Step:

Process_Description: Spectroscopic analysis of soil samples

Process_Date: 201001

Process_Step:

Process_Description:

Laboratory physical and chemical analysis according to Van Reeuwijk, L.P., 2002. Procedures for soil analysis. ISRIC Technical Paper 9.

Process_Date: 201003

Process_Step:

Process_Description: Exploratory data analysis, checking for consistency

Process_Date: 201104

Process_Step:

Process_Description: Construction of consistent digital databases

Process_Date: 201108

Process_Step:

Process_Description:

Calibrating predictive model of soil organic C, predicting at all observation points

Process_Date: 201201

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count:

128 (with lab analysis; file 3tu_lnp_lab.csv and R object lnp.stations.lab.3tu)
410 (with spectroscopy-predicted soil organic C; file 3tu_lnp_pred.csv and R object lnp.stations.pred.3tu)

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 36S

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: 33

Latitude_of_Projection_Origin: 0

False_Easting: 500000

False_Northing: 1000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 1

Ordinate_Resolution: 1

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: UTM36S

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.9786982

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: lnp.stations.lab.3tu; lnp.stations.pred.3tu

Entity_Type_Definition: point feature

Entity_Type_Definition_Source:

lnp.stations.lab.3tu: 128 field observations of topsoils, with lab. analysis
lnp.stations.pred.3tu: 410 field observations of topsoils, with soil organic C concentration predicted by spectroscopy calibrated to lab. determinations

Attribute:

Attribute_Label: station

Attribute_Definition: station number for field observations

Attribute_Definition_Source: assigned by researcher

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 59

Attribute_Units_of_Measure: sequential interger identification

Attribute:

Attribute_Label: substation

Attribute_Definition:

station and substation within it, numbered 1..7
Some combinations are missing because the substation was not accessible or not soil.

Attribute_Definition_Source: assigned by researcher

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.4

Range_Domain_Maximum: 59.6

Attribute_Units_of_Measure:

decimal, sequential interger identification "." substation sequential integer

Attribute:

Attribute_Label: zA

Attribute_Definition: topsoil thickness

Attribute_Definition_Source: field measurement with ruler

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 26

Attribute_Units_of_Measure: cm

Attribute_Measurement_Resolution: 0.5

Attribute:

Attribute_Label: diff

Attribute_Definition:

informal description of the topsoil (A horizon) and immediately subjacent subsoil

Attribute_Definition_Source: field notes

Attribute_Domain_Values:

Unrepresentable_Domain: free text

Attribute:

Attribute_Label: lmu

Attribute_Definition: Land mapping unit

Attribute_Definition_Source:

Stalmans, M., Gertenbach, W.P.D., and Carvalho-Serfontein, F., 2004. Plant communities and landscapes of the Parque Nacional do Limpopo, Moçambique. Koedoe 47, 61–81.
The landscape map from this report was digitized with permission of the copyright holder and the land mapping unit at each observation point was extracted by map overlay.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: "CMR","LLF","LN" ,"MCM","MSC","NS","PS","SAF"

Enumerated_Domain_Value_Definition:

[1] "Combretum / Mopane Rugged Veld" [2] "Limpopo Levubu Floodplains" [3] "Lebombo North" [4] "Mixed Combretum / Mopane Woodland" [5] "Mopane Shrubveld on calcrete" [6] "Nwambia Sandveld" [7] "Pumbe Sandveld" [8] "Salvadora angustifolia floodplains"

Enumerated_Domain_Value_Definition_Source:

Stalmans, M., Gertenbach, W.P.D., and Carvalho-Serfontein, F., 2004. Plant communities and landscapes of the Parque Nacional do Limpopo, Moçambique. Koedoe 47, 61–81.

Attribute:

Attribute_Label: obs

Attribute_Definition: informal description of land use/land cover at observation site

Attribute_Definition_Source: field notes

Attribute_Domain_Values:

Unrepresentable_Domain: free text

Attribute:

Attribute_Label: pH.H20

Attribute_Definition: pH of soil solution in 1:2.5 soil:H20

Attribute_Definition_Source:

Van Reeuwijk, L.P., 2002. Procedures for soil analysis. ISRIC Technical Paper 9.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3.74

Range_Domain_Maximum: 8.97

Attribute_Units_of_Measure: pH

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: pH.KCl

Attribute_Definition: pH of soil solution in 1:2.5 soil: 1 M KCl

Attribute_Definition_Source:

Van Reeuwijk, L.P., 2002. Procedures for soil analysis. ISRIC Technical Paper 9.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3.36

Range_Domain_Maximum: 8.06

Attribute_Units_of_Measure: pH

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: OC

Attribute_Definition: concentration of organic C in fine earth (< 2mm), weight

Attribute_Definition_Source:

Van Reeuwijk, L.P., 2002. Procedures for soil analysis. ISRIC Technical Paper 9.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00

Range_Domain_Maximum: 2.66

Attribute_Units_of_Measure: %, weight

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: clay

Attribute_Definition: clay proportion of fine earth (<2 mm), weight

Attribute_Definition_Source:

Van Reeuwijk, L.P., 2002. Procedures for soil analysis. ISRIC Technical Paper 9.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5.3

Range_Domain_Maximum: 47.3

Attribute_Units_of_Measure: weight %

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: silt

Attribute_Definition: silt proportion of fine earth (<2 mm), weight

Attribute_Definition_Source:

Van Reeuwijk, L.P., 2002. Procedures for soil analysis. ISRIC Technical Paper 9.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.0

Range_Domain_Maximum: 50.5

Attribute_Units_of_Measure: weight %

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: sand

Attribute_Definition: sand proportion of fine earth (<2 mm), weight

Attribute_Definition_Source:

Van Reeuwijk, L.P., 2002. Procedures for soil analysis. ISRIC Technical Paper 9.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2.2

Range_Domain_Maximum: 93.5

Attribute_Units_of_Measure: weight %

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: pred.OC

Attribute_Definition: soil organic C predicted by spectroscopy

Attribute_Definition_Source:

Prediction from best cross- and direct-validated PLSR model built from a calibration set with both wet lab. determinations and lab. spectroscopy
Details in Cambule, A.H., Rossiter, D.G., Stoorvogel, J.J., and Smaling, E.M.A., 2012. Building a near infrared spectral library for soil organic carbon estimation in the Limpopo National Park, Mozambique. Geoderma 183–184, 41–48. DOI 10.1016/j.geoderma.2012.03.011

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 2.67

Attribute_Units_of_Measure: weight % of fine earth

Attribute_Measurement_Resolution: 0.01

Attribute_Value_Accuracy_Information:

Attribute_Value_Accuracy: 0.32

Attribute_Value_Accuracy_Explanation:

Validation: independent set; Validation success was RMSEP 0.32% SOC, R^2 = 0.84 to a 1:1 line.
Cross-validation: PLSR; Median X validation residual –0.0035%, IQR –0.015 to +0.013%, but there were some very poorly-modelled points, at the extremes –1.25 and +1.75% SOC.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: 3TU.Datacentrum

Contact_Address:

Address_Type: mailing and physical address

Address:

Ask Your Library Prometheusplein 1

City: Delft

State_or_Province: ZH

Postal_Code: 2628 ZC

Country: Netherlands

Contact_Voice_Telephone: +31 (0)15 27 85678

Contact_Electronic_Mail_Address: Library@tudelft.nl

Hours_of_Service: constant

Contact_Instructions: search and download from <http://datacentrum.3tu.nl/en>

Distribution_Liability: No warrant of correctness

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name:

File name LimpopoNationalParkSoilOrganicC_3tu.zip
This contains three kinds of files; with the same information:
R spatial objects, class "SpatialPointsDataFrame"; requires R package "sp" (extension .Rdata)
Objects: (1) lnp.stations.lab.3tu (128 points with lab. determinations); (2) lnp.stations.pred.3tu (410 points with predicted soil organic C)
ASCII CSV files (extension .csv); coordinates are fields E and N
Files: 3tu_lnp_stations_lab.csv, 3tu_lnp_stations_pred.csv
ESRI shapefiles (extension .shp, with support files .shx, .prj, .dbf); these are in subfolder `shape'
File names w/o extension: LNPstationsLab, LNPstationsPred
The ZIP also contains FGDC metadata, XML format, in file 3tu.xml, and HTML format, in file 3tu.html

File_Decompression_Technique: ZIP

Transfer_Size: 0.1

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://datacentrum.3tu.nl/en>

Fees: none

Ordering_Instructions: search and download from <http://datacentrum.3tu.nl/en>

Metadata_Reference_Information:

Metadata_Date: 20130628

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: David G Rossiter

Contact_Organization: University of Twente

Contact_Position: Senior University Lecturer

Contact_Address:

Address_Type: mailing address

Address:

University of Twente, Faculty ITC P.O. Box 217

City: Enschede

State_or_Province: OV

Postal_Code: 7500 AE

Country: Netherlands

Contact_Voice_Telephone: +31 (0)53 487-4499

Contact_Electronic_Mail_Address: d.g.rossiter@utwente.nl

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998