Related Experiment Videos
[Master sample and geoprocessing: technologies for household surveys].
Nilza Nunes da Silva1, Tarcisio Neves da Cunha, José Alberto Quintanilha
1Departamento de Epidemiologia, Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo, SP, Brasil. nndsilva@usp.br
Revista De Saude Publica
|August 26, 2003
Summary
This study demonstrates that a master sample design using updated address data and Geographic Information System (GIS) technology significantly reduces costs and time for household surveys in urban areas.
Area of Science:
- Epidemiology
- Demography
- Urban Planning
Context:
- Household sampling for epidemiological surveys is often costly and time-consuming.
- Existing address data from national surveys can be leveraged for more efficient sampling.
- Geographic Information System (GIS) technology offers tools for spatial data management and visualization.
Purpose:
- To evaluate the feasibility of a shared address data file for multiple epidemiological surveys.
- To reduce the cost and time associated with traditional household sampling methods.
- To assess the utility of updated National Survey of Households (PNAD) data for sampling.
Summary:
- A master sample of 25,000 dwellings was created using a two-stage cluster sampling procedure in S o Paulo.
- GIS technology was employed to delineate census enumeration areas, blocks, and streets for sample selection.
- The study utilized updated address data from the PNAD, integrated with GIS, to create a permanent address data file.
Impact:
- The master sample design, combined with GIS, provides a cost-effective and time-efficient alternative for urban household surveys.
- This approach streamlines the sampling process for multiple surveys conducted between national censuses.
- The findings contribute to improved planning and execution of public health sampling surveys in Brazil.