Secondary data is data collected by any party other than the researcher, including administrative data from programs, geodata from specialized sources, and census or other population data from governments.
Secondary Data Sources
Telecom Data is a type of secondary data. This page introduces it, discusses factors to consider when working with it, and outlines different topics in which researchers have used it for analysis.
Remote Sensing involves the collection and interpretation of information sensed from distant objects, using usually aircrafts and satellites. It is used to sense the energy that is naturally emitted or reflected by the earth’s surface, from the atmosphere, or from other devices. Any object with a temperature above absolute zero, -273°C, emits energy called electromagnetic radiation that depends on the object’s temperature. The higher the temperature of the object, the shorter is the reflected electromagnetic radiation wavelength.
Crowdsourced data collection is a participatory method of building a dataset with the help of a large group of people. This page provides a brief overview of crowdsourced data collection in development and highlights points to consider when crowdsourcing data. Crowdsourced Data is a form of secondary data.
Read First
The proliferation of remote sensing technology has created new opportunities for high-resolution, affordable geospatial data, which have great potential as a source of impact evaluation data.
Guidelines
Repositories of Spatial Data
The following are repositories of spatial data. The following sites pull in spatial data from a variety of sources.