Additional Data Collection Using in Situ Data (In Addition to Remote Sensing Data) (Especially for GATE-Geospatial 2022)

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Once the problem has been stated and the theories formed it is necessary to collect data, both in situ and remotely, in order to progress toward a solution. If data is to be useful, it must be collected properly. Whatever logic used; every problem will have different data requirements. A researcher should know what sort of data is needed before setting out to collect it. While there may be situations which dictate either in situ or remotely sensed data many situations will require the researcher to collect both types of data.

Sensor System

In Situ Data

Remotely sensed data is being used in numerous fields and for a wide variety of applications. Consequently, the collection of in situ data may take the form of field sampling, laboratory sampling, or some combination of both. The techniques for these types of data collection should ideally be learned from the physical and natural science courses most related to the specific field of studies such as chemistry, biology, forestry, soil science, hydrology, or meteorology. When in situ data is to be used with remotely sensed data, it is important (for reasons explained elsewhere) that the positions of these data are known in relation to the remotely sensed data. Due to ease of use and increasing affordability, global positioning system (GPS) receivers are the ideal tool to be used to gather such positional data when needed. Using a GPS receiver, an x, y, and z coordinate can quickly be obtained to identify and locate individual samples in relation to remotely sensed data.

Global Positioning System Sensor

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