Income Poverty, Vitamin A and Iodine in Nigeria

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Frequently-anticipated questions:

What does this data set describe?

Title: Income Poverty, Vitamin A and Iodine in Nigeria
Abstract:
Two country-wide surveys, one on rural livelihoods, poverty and food demand, and the other on food consumption and child nutrition, were carried out in Nigeria by IITA, and some results were mapped in order to test the feasibility of extrapolation by small area estimation and geostatistics and assist interpretation of the results. The lack of reliable recent census statistics in Nigeria complicates the process of mapping socio-economic variables. The Small Area Estimation technique has been adapted for regression of poverty and nutrition indicators against biophysical and socio-economic variables such as rainfall, soil fertility and travel time to markets and applied to groups of Nigerian States. Where no significant correlation was observed, values were interpolated geostatistically. The study showed that it was possible to map this type of socio-economic variable even where reliable census data was not available, although statistically valid confidence levels could not be determined. Three major areas of serious poverty were identified in Nigeria; in south-west Nigeria, in the north-central portion of the country, and in the far north-east. The richest rural areas in Nigeria appear to be in the western parts of Benue and Bauchi States. Iodine deficiency in children is most common in the south-west, centre, and extreme north, while Vitamin A deficiency in children is prevalent in the south-west and north-east.
  1. How should this data set be cited?

    International Institute for Tropical Agriculture, Unknown, Income Poverty, Vitamin A and Iodine in Nigeria.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 2.668432
    East_Bounding_Coordinate: 14.680070
    North_Bounding_Coordinate: 13.892010
    South_Bounding_Coordinate: 4.277144

  3. What does it look like?

    <http://gisweb.ciat.cgiar.org/povertymapping/images/Nigeria_poverty.jpg> (JPEG)
    Distribution of Poverty in Nigeria

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 2002
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (774)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    NigeriaCaseStudy
    preliminary extrapolation of poverty indicator (US dollar per day per household) (Source: C. Legg; International Institute for Tropical Agriculture - IITA)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    ADM1NAME
    Name of first-level division (state) (Source: International Institute for Tropical Agriculture - IITA)

    States Name

    ADM2NAME
    Name of secondt-level division (Local Government Areas - LGA) (Source: International Institute for Tropical Agriculture - IITA)

    Local Government Areas Name

    H_QUARTERS
    Capitals of Local Government Areas (LGA) (Source: International Institute for Tropical Agriculture - IITA)

    Coordinates defining the features.

    IODINE
    Iodine Deficiency Prevalence (Source: International Institute for Tropical Agriculture - IITA)

    Coordinates defining the features.

    VITA
    Vitamin A Deficiency Prevalence (Source: International Institute for Tropical Agriculture - IITA)

    Coordinates defining the features.

    INCOME
    Poverty Indicator: Household daily income in Niara (Source: International Institute for Tropical Agriculture - IITA)

    Coordinates defining the features.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Christopher Legg
    IITA
    Nabager Geospatial Laboratory
    Croydon CR9 3EE
    London, London Croydon CR9 3EE
    United Kingdom

    +234 2 241 2626 (voice)
    +234 2 241 2221 (FAX)
    c.legg@cgiar.org

Why was the data set created?

Poverty and malnutrition are persistent problems in Africa. Alleviation of these closely-related socio-economic problems must be guided by knowledge of their spatial distribution and relationships to biophysical and development factors.

How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 27-Jan-2006 (process 1 of 1)
    Dataset copied.

    Data sources used in this process:

    • \\Gis-pc155\work\poverty\CIESIN\Nigeria\Final\NigeriaCaseStudy

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    None

  5. How consistent are the relationships among the observations, including topology?

    None

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
This is preliminary information only. Not for publication. Users are prohibited from any commercial, non-free resale, or redistribution without explicit written permission from IITA. Users should acknowledge IITA as the source used in the creation of any reports, publications, new data sets, derived products, or services resulting from the use of this data set. NO WARRANTY OR LIABILITY. IITA provides these data without any warranty of any kind whatsoever, either express or implied, including warranties of merchantability and fitness for a particular purpose. IITA shall not be liable for incidental, consequential, or special damages arising out of the use of any data downloaded.

  1. Who distributes the data set? (Distributor 1 of 1)

    Christopher Legg
    IITA
    Nabager Geospatial Laboratory
    Croydon CR9 3EE
    London, London Croydon CR9 3EE
    United Kinhdom

    +234 2 241 2626 (voice)
    +234 2 241 2221 (FAX)
    c.legg@cgiar.org

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    None

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 01-Mar-2006
Metadata author:
International Institute of Tropical Agriculture
c/o Chris Legg
Head of GIS lab
Ibadan, Oyo State PMB 5320
Nigeria

(+234 2) 241 2626 (voice)

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.18 on Wed Mar 01 15:22:28 2006