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Predicted areas of suitability for tsetse flies: West Africa

Identification info

Title

Date

2001-12-01

Date type

Creation: Date identifies when the resource was brought into existence

Edition

first

Presentation form

Digital map: Map represented in raster or vector form

Abstract

The dataset contains the predicted areas of suitability for two tsetse fly species (palpalis and tachinoides). All of the distributions have been produced using variations of the same methodology - by modelling the "known" presence and absence of the flies (usually the 1977 Ford and Katondo maps modified with more recent information collected from national and international agencies and researchers). The modelling process relies on logistic regression of fly presence against a wide range of predictor variables for a large number of regularly spaced sample points for each area. The predictor variables include remotely sensed (satellite image) surrogates of climate - vegetation, temperature, moisture - which have been subjected to Fourier processing to provide an additional set of season and timing related measures for each parameter. Demographic, topographic and agroecological predictors are also used. These models are then applied to the predictor imagery to determine the predicted areas of suitability for tsetse. Data are provided at 1 kilometre resolution. The maps were produced in December 2002 for FAO/IAEA Joint Division by Environmental Research Group Oxford (ERGO Ltd) in collaboration with the Trypanosomosis and Land Use in Africa (TALA) research group.

Status

Completed: Production of the data has been completed

Point of contact

Individual name	Raffaele Mattioli
Organisation name	FAO
Position name	AGAH Animal Health Officer
Role	Point of contact: Party who can be contacted for acquiring knowledge about or acquisition of the resource

Voice	+ 39 06 570 56078
Delivery point	FAO AGAH, Viale delle Terme di Caracalla
City	Rome
Postal code	00100
Country	it
Electronic mail address	raffaele.mattioli@fao.org

Maintenance and update frequency

As needed: Data is updated as deemed necessary

Descriptive keywords

african tripanosomiasis (theme).

Descriptive keywords

Western Africa (place).

Access constraints

Copyright: Exclusive right to the publication, production, or sale of the rights to a literary, dramatic, musical, or artistic work, or to the use of a commercial print or label, granted by law for a specified period of time to an author, composer, artist, distributor

Use constraints

Spatial representation type

Grid: Grid data is used to represent geographic data

Language

English

Character set

UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646

Topic category code

Biota

Topic category code

Health

Topic category code

Environment

Topic category code

Farming

Extent

Geographic bounding box

WGS 84

	North bound
West bound	Polygon((31.815002 0,-11 0,-11 14,31.815002 14,31.815002 0))	East bound
	South bound

Distribution Information

Download Summary

Transfer options

OnLine resource	Programme Against African Trypanosomiasis - Information System
Data for download	Tsetse flies: predicted areas of suitability
Data for download	Report: Kilometre resolution Tsetse Fly distribution maps for the Lake Victoria Basin and West Africa
OnLine resource	The role of FAO GeoNetwork in a multinational development programme: the case of the Programme Against African Trypanosomiasis
OnLine resource	Environmental Research Group Oxford

Spatial representation info

Number of dimensions

931

Dimension name

Row: Ordinate (y) axis

Dimension size

0.01

Resolution

Units of measure

Dimension name

Column: Abscissa (x) axis

Dimension size

832

Resolution

Units of measure

Resolution

0.01

Dimension name

Vertical: Vertical (z) axis

Resolution

Units of measure

Cell geometry

Area: Each cell represents an area

Reference System Information

Code	WGS 1984

Data quality info

Hierarchy level

Dataset: Information applies to the dataset

Statement

Three sets of training data on the "known" presence and absence of the flies were used: the Ford and Katondo distributions (Ford, J. and Katondo, K.M. 1977. The distribution of tsetse flies in Africa. Nairobi, OAU. Cook, Hammond & Kell.); modifications of Ford and Katondo presence absence maps from a wide range of sources; the 5 kilometre resolution predictions that were produced using such modified Ford and Katondo maps (Wint, G.R.W. and Rogers, D.J. 2000. Predicted Distributions of Tsetse in Africa. FAO, Rome.)

Metadata

File identifier

f87d5e00-88fd-11da-a88f-000d939bc5d8

Metadata language

English

Character set

UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646

Date stamp

2009-02-24T10:53:52

Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0

Contact

Individual name	Giuliano Cecchi
Organisation name	FAO - AGAH
Position name	Consultant
Role	Point of contact: Party who can be contacted for acquiring knowledge about or acquisition of the resource

Voice	+ 39 06 570 53526
Delivery point	Viale delle Terme di Caracalla
City	Rome
Postal code	00100
Country	Italy
Electronic mail address	giuliano.cecchi@fao.org