Metadata format: ISO 19139

HRSL Kenya Population


Resource Identification Information

Citation
TitleHRSL Kenya Population


Creation date2016-11-01
Publication date2016-11-15


Edition1.0
Edition date2016-11-08
Presentation formatimageDigital


Collection titleHigh Resolution Settlement Layer (HRSL)


Other citation detailsRecommended citation: Facebook Connectivity Lab and Center for International Earth Science Information Network - CIESIN - Columbia University. 2016. High Resolution Settlement Layer (HRSL). Source Imagery © 2016 DigitalGlobe, Inc. Accessed [DAY MONTH YEAR]


Themes or categories of the resourcesociety


Place keywords
KeywordsKenya


Theme keywords
Keywordspopulation, demography


Descriptive keywords 
KeywordsDownloadable Data


Thesaurus ArcIMS Metadata Service Content Types


Abstract
              The High Resolution Settlement Layer (HRSL) provides estimates of human population distribution at a resolution of 1 arc-second (approximately 30m) for the year 2015. The population estimates are based on recent census data and high-resolution (0.5m) satellite imagery from DigitalGlobe. The population grids provide detailed delineation of settlements in both urban and rural areas. The data were developed using computer vision techniques to classify blocks of optical satellite data as settled (containing buildings) or not. Proportional allocation was used to distribute population data from subnational census data to the settlement extents. The data are distributed as GeoTIFF files. The Population GeoTIFF represents population estimates (in persons).
            
Purpose
              Provide detailed population estimates for research in humanitarian, disaster response, sustainability, and infrastructure planning fields.
            
Dataset languageEnglish
Dataset character setutf8


Maintenance
Update frequencyirregular


Resource constraints
Constraints
Limitations of use
                      This work is licensed under the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0). Users are free to use, copy, distribute, transmit, and adapt the work for commercial and non-commercial purposes, without restriction, as long as clear attribution of the source is provided.
                    
Resource constraints
Legal constraints
Limitations of use
                      CIESIN strives to disseminate quality Data and to provide accurate metadata and documentation consistent with best practices and accepted standards. This includes appropriate version control and archiving so that users understand changes to Data and can obtain previous versions for comparison purposes. Nevertheless, CIESIN, Columbia University, and their sponsors offer Data on a where is, as is basis and do not offer an express or implied warranty regarding quality, applicability, or accuracy.
                    
Resource constraints
Legal constraints
Limitations of use
                      This work is licensed under the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0). Users are free to use, copy, distribute, transmit, and adapt the work for commercial and non-commercial purposes, without restriction, as long as clear attribution of the source is provided.
                    
Spatial representation typegrid


Processing environment Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.0.6491


Extent
Geographic extent
Bounding rectangle
Extent contains the resourcetrue
West longitude-5.517502
East longitude2.404998
North latitude15.080853
South latitude9.40252

Extent
Geographic extent
Bounding rectangle
Extent contains the resourcetrue
West longitude-3.505342
East longitude1.39438
North latitude11.169567
South latitude4.738734

Extent
Geographic extent
Bounding rectangle
Extent contains the resourcetrue
West longitude79.453139
East longitude81.885639
North latitude9.835976
South latitude5.918476

Extent
Geographic extent
Bounding rectangle
Extent contains the resourcetrue
West longitude14.400218
East longitude32.903551
North latitude-22.129693
South latitude-34.837471

Extent
Geographic extent
Bounding rectangle
Extent contains the resourcefalse
West longitude33.912783
East longitude41.886671
North latitude4.921745
South latitude-4.917699

Credits
              Connectivity Lab at Facebook. Center for International Earth Science Information Network - CIESIN - Columbia University. Source imagery provided by DigitalGlobe. Census data collected as part of the Gridded Population of the World project.
            
Point of contact - pointOfContact
Individual's nameCIESIN User Services
Organization's nameCenter for International Earth Science Information Network - CIESIN - Columbia University


Contact information
Phone
Voice+1 (845)365-8988
Fax+1 (845)365-8922

Address
Delivery pointPO Box 1000
CityPalisades
Administrative areaNY
Postal code10964
CountryUNITED STATES
e-mail addressciesin.info@ciesin.columbia.edu

Hours of service9-5 Monday-Friday


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Spatial Representation - Georectified

Number of dimensions2
Axis dimensions properties
Dimension
Dimension namerow
Dimension size35422
Resolution
Distance0.000278 deg (degree)

Dimension
Dimension namecolumn
Dimension size28706
Resolution
Distance0.000278 deg (degree)

Cell geometryarea
Transformation parameters are availabletrue
Point in pixelcenter




Check points are availablefalse


Corner points
Point33.912783 -4.917699
GML object unique identifierID0EOGAC

Point33.912783 4.921745
GML object unique identifierID0EAHAC

Point41.886671 4.921745
GML object unique identifierID0EUGAC

Point41.886671 -4.917699
GML object unique identifierID0E1GAC

Center point
Point37.899727 0.002023
GML object unique identifierID0EGHAC

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Content Information - Image Description

Type of informationimage
Attribute described by cell valuesBand_1: Persons (count)


Band information
Minimum and maximum valuesBand_1
Sequence identifier
Name1
Type namemodeled

Longest wavelength4559.00084
Shortest wavelength0
Wavelength units
Catalog Symbol[arb'U]
Codespacehttp://aurora.regenstrief.org/UCUM

IdentifierUnified Code of Units of Measure
CodespaceGML_UomSymbol
GML object unique identifierID0AAABCCABA

Number of bits per value64


Imaging conditioncloud
Percent cloud cover0.2


Triangulation has been performedfalse
Radiometric calibration is availablefalse
Camera calibration is availablefalse
Film distortion information is availablefalse
Lens distortion information is availablefalse


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Reference System Information

Reference system identifier
Value4326


CodespaceEPSG
Version6.14(3.0.1)

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Data Quality Information

Scope of quality information
Resource leveldataset


Lineage
Source data
Level of the source dataDigtalGlobe Basemap +Vivid http://explore.digitalglobe.com/Basemap-Vivid.html


Source data
Level of the source dataGridded Population of the World, version 4 (GPWv4) input census data. http://sedac.ciesin.columbia.edu/gpw


Data quality report - Completeness omission
Measure nameLandmass covered
Evaluation typedirectInternal


Measure descriptionProportion of the country included in the analysis


Quantitative test results
Value99.68


Value typeCompleteness
Units
Catalog Symbol[arb'U]
Codespacehttp://aurora.regenstrief.org/UCUM

IdentifierUnified Code of Units of Measure
CodespaceGML_UomSymbol
GML object unique identifierID0ABACABAEA

Error statisticProportion


Data quality report - Thematic classification correctness
Measure nameRecall
Evaluation typedirectInternal


Measure descriptionRecall of computer vision classification used to identify settlements in the imagery. Recall or sensitivity, is the fraction of relevant instances that are retrieved. Recall = TP / (TP + FN) where TP = true positive, FP = false positive, FN = false negative


Quantitative test results
Value0.849


Value typeClassifier performance metric
Units
Catalog Symbol[arb'U]
Codespacehttp://aurora.regenstrief.org/UCUM

IdentifierUnified Code of Units of Measure
CodespaceGML_UomSymbol
GML object unique identifierID0ABACABBEA

Error statisticFraction


Data quality report - Thematic classification correctness
Measure namePrecision
Evaluation typedirectInternal


Measure descriptionPrecision of computer vision classification used to identify settlements in the imagery. Precision, or positive predictive value, is the fraction of retrieved instances that are relevant in the classification. Precision = TP / (TP + FP) where TP = true positive, FP = false positive, FN = false negative


Quantitative test results
Value0.957


Value typeClassifier performance metric
Units
Catalog Symbol[arb'U]
Codespacehttp://aurora.regenstrief.org/UCUM

IdentifierUnified Code of Units of Measure
CodespaceGML_UomSymbol
GML object unique identifierID0ABACABCEA

Error statisticFraction


Data quality report - Thematic classification correctness
Measure nameAccuracy
Evaluation typedirectInternal


Measure descriptionAccuracy of computer vision classification used to identify settlements in the imagery. Accuracy = TP + TN / (TP + TN + FP + FN) where TP = true positive, TN = true negative, FP = false positive, FN = false negative


Quantitative test results
Value0.996


Value typeClassifier performance metric
Units
Catalog Symbol[arb'U]
Codespacehttp://aurora.regenstrief.org/UCUM

IdentifierUnified Code of Units of Measure
CodespaceGML_UomSymbol
GML object unique identifierID0ABACABAFA

Error statisticFraction


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Distribution Information

Format
NameRaster Dataset
Version6.0
SpecificationGeoTIFF
File decompression techniqueLZW


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Metadata Information

Last update2017-09-11
Maintenance
Update frequencyasNeeded


Metadata contact - pointOfContact
Individual's nameCIESIN User Services
Organization's nameCenter for International Earth Science Information Network - CIESIN - Columbia University


Contact information
Phone
Voice+1 (845)365-8988
Fax+1 (845)365-8922

Address
Delivery pointPO Box 1000
CityPalisades
Administrative areaNY
Postal code10964
CountryUNITED STATES
e-mail addressciesin.info@ciesin.columbia.edu

Hours of service9-5 Monday-Friday


Scope of the data described by the metadatadataset
Scope namedataset


Metadata languageEnglish
Metadata character setutf8


Name of the metadata standard usedISO 19139 Geographic Information - Metadata - Implementation Specification
Version of the metadata standard2007


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