Field surveys involve the collection of data directly from the field, through observations, measurements, and interviews.

The NRSC primarily uses satellite imagery from various Earth observation satellites for data collection.

The Census of India is a comprehensive source of socio-economic data collected through household surveys.

Remote sensing techniques, such as satellite imagery and aerial photography, are commonly used for land use and land cover mapping.

Historical records, such as old maps, gazetteers, and travelogues, are examples of secondary data sources.

Field surveys involving soil sampling and analysis are commonly used to collect data on soil characteristics.

Field surveys can involve qualitative data collection through observations, interviews, and focus groups.

Remote sensing techniques, such as satellite imagery and aerial photography, are commonly used for mapping and monitoring water resources.

The Census of India collects quantitative data on various socio-economic parameters through household surveys.

Remote sensing techniques, such as satellite imagery and aerial photography, are commonly used for vegetation and forest cover mapping.

Field surveys can involve both quantitative and qualitative data collection methods, such as questionnaires, interviews, and observations.

Meteorological stations are used to collect data on various climate and weather parameters, such as temperature, precipitation, wind speed, and humidity.

Participatory Rural Appraisal (PRA) is a participatory data collection method that involves local communities in the data collection process.

Topographic surveys involve the collection of data on landforms, elevations, and other topographic features.

The Census of India collects non-spatial data on various socio-economic parameters through household surveys.