(Yield) Maps - StellarSupport - John Deere

JDOffice 1.2
wavelengths at a spatial resolution of 33 feet (10 m).
Multispectral Scanner. An electromagnetic sensor that collects data in several wavelength bands simultaneously.
N
National Agricultural Statistics Service. An agency that conducts surveys and prepares reports on production and
supplies of food and fiber, prices paid and received by farmers, farm labor and wages, and farm aspects of the U.S.
agricultural industry.
NAVSTAR (NAVgation by Satellite Timing and Ranging). See Global Positioning System (GPS).
Nearest Neighbor. An interpolation method in which the unknown value is set equal to its nearest neighbor.
NGPS. (“not GPS”) A system for calculating location of an object by determining distances from at least three land-based
radio towers.
NPK. Nitrogen, Phosphorous, Potassium.
Nitrogen (N). An inert gas that makes up about four-fifths of the Earth’s atmosphere. Nitrogen is one of the three primary
plant nutrients and is essential for plant growth.
O
Operation Delay. The time required for grain to move from the combine header to the grain-flow sensor.
Option. An activity that is available from the screen. May appear as a command bar or a row of file folders.
Outliers. Points in a point yield map that lie way outside of the boundaries of the field.
P
Panchromatic. Images created from radiation with wavelengths between 0.45 and 0.90 µm, usually produced in grayscale
(black and white).
Parallel Swathing. Driving (or flying) a vehicle in straight, parallel paths without leaving gaps or overlapping consecutive
paths (swaths).
Passive Sensing Systems. Remote sensing systems that measure naturally emitted and reflected signals.
PC Card. A small credit-card-size data storage device used to save and transfer data from most yield-mapping systems.
PCMCIA (Personal Computer Memory Card International Association). The standard interface utilized by PC Cards.
pH. A term used to indicate the degree of acidity or alkalinity. A material that has a pH of 7.0 is neutral. Values above 7.0
denote alkalinity and below 7.0 denote acidity. Chemically, pH is the negative logarithm of the hydrogen ion concentration.
Phosphorus (P). A nonmetallic element that is one of the three primary plant nutrients.
Photosensor. A device that is used to detect light.
Pick Lists. A list of values to choose from for a particular data field.
Pixel. “Picture element,” the smallest area or element of an image map.
Platform. Vehicle that carries a remote sensing device.
Point Sampling. See Grid Center Method.
Positioning System. A general system for identifying and recording, often electronically, the location of an object or person.
Post-Processing. Differential correction of GPS position data after it has been collected in the field and stored on a
computer diskette or PCMCIA card.
Potash. (potassium oxide, K2O) The potassium content of fertilizers is expressed as potash.
Potassium. (K) A highly reactive element that combines readily with oxygen and many anions. One of the three primary
plant nutrients.
Potentiometer. A device that produces a changing electrical resistance as the relative positions of its components are
changed.
Precise (P) Code. A pseudorandom noise code transmitted by GPS satellites. Each satellite is assigned a unique segment
of the code. Reserved mainly for military GPS receivers.
Precise Positioning System (PPS). The GPS service available to the U.S. military that provides users full accuracy with a
single mobile receiver. It includes access to the P-code and the removal of selective availability effects.
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