(Yield) Maps - StellarSupport - John Deere

Glossary
A
Active Sensing Systems. Remote sensing systems that generate a signal, bounce it off an object, and measure the
reflected signal.
Actuator. A device used in a variable-rate application that physically moves in response to controller signals to regulate the
amount of material applied to a field.
AEA Shape Format. Export format which creates a directory that contains seven separate files. The total of these seven
files is smaller in size than the one exported file created in the Text format. Currently, AEA Shape File is the industry
standard, and is the default choice of JDFarm Office.
Aerial Photography. Remote sensing technique in which a photograph of a portion of the Earth’s surface is taken from an
aircraft or satellite in flight.
Algorithm. A formula that relates sensor input to actuator output.
Altitude. Elevation.
American Standard Code for Information Interchange (ASCII). The predominant code used by present-day computers
for identifying characters such as numbers and letters.
Array. A collection of sensors located on a particular spacing that collect data simultaneously.
Attribute. A characteristic description of an item.
B
Band. A discrete interval of the electromagnetic spectrum between two wavelength values.
Base Map. A map containing field boundaries and data used for location reference.
Batch-Type Yield Monitor. A yield monitor that weighs the amount of harvested grain as it sits in the combine grain tank
or as it is being unloaded. Yield must be calculated using an estimate of the area harvested.
Boundary. The solid outline of a piece of land (field).
C
Calibrated Vegetation Map. A map produced to represent the vegetation in a field in terms of colors within the Green
Vegetation Index. Calibration of the maps allows two different maps to be compared to one another since the resulting
scales will be the same on both maps.
Calibration. The adjustment of the sensor readings for mass flow to more accurately reflect scale weights for a field.
Eliminates false trends in the field map. In JDFarm Office, in each field and each crop where a calibration was done would
have to be calibrated separately.
Capacitance-Type Moisture Sensor. A moisture sensor that measures the dielectric properties of grain as it passes
between metal plates.
Carrier. The base radio frequency on which signal information is encoded and then transmitted.
Carrier-Phase Tracking. Accurate and sophisticated method of determining position requiring two special receivers that
measure small differences in radio signals.
Carrier Tracking Loop. Module in a GPS receiver that extracts the satellite message by aligning the receiver’s internally
generated signal with the phase of the received GPS signal. Used to provide a carrier-phase observation.
Cation Exchange Capacity (CEC). Represents the total quantity of negative charge available in the soil to attract positively
charged ions in the soil solution.
Channel. Circuitry necessary for a GPS receiver to receive the signal from a single GPS satellite.
Circular Error Probable (CEP). A measure of the positional accuracy provided by a GPS receiver. CEP is the radius of the
circle inside which the measured position has a 50 percent probability of being located.
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