(Yield) Maps - StellarSupport - John Deere

JDOffice 1.2
Field Doc Harvest (not yet defined) this data will be stored in GSD files.
Geographic Data. Data that contains not only the attribute being monitored, but also the spatial location of the attribute.
Also known as spatial data.
Geographic Information System (GIS). A system, usually computer-based, for the input, storage, retrieval, analysis, and
display of geographic data. The GIS database is usually composed of map-like spatial representations called layers. Theses
layers contain information on several attributes including land elevation, land use, land ownership, crop yield, input
application rates, and soil-nutrient levels.
Geometric Correction. Correction to align measured ground control points in a remotely sensed image with the ground
control points on an established map of the area.
Geometric Dilution of Precision (GDOP). Term qualifying the effect of satellite geometry (relative positions of several
satellites) on the magnitude of error in a GPS position measurement.
Georeferenced Data. Spatial data that pertains to specific locations on the Earth’s surface.
Georeferencing. The process of associating data points with specific locations on the Earth’s surface.
Geo-Stationary Satellite. Space vehicles in an orbit that keeps them over the same location on the Earth at all times.
Global Positioning System (GPS). A network of satellites controlled by the Department of Defense that are designed to
help determine a radio receiver’s position in latitude, longitude and altitude. GPS is not a synonym for Precision Farming.
GPS is only one technology that is used in Precision Farming.
GLONASS (GLObal’naya NAvigatsionnaya Sputnikovaya Sistema). The Russian global navigation satellite system.
Green Vegetation Index (GVI). An absolute color scale used to account for the effects of humidity, dust, and sun angle on
remotely sensed images.
Grid. A data structure that divides an area such as a field into rectangular units. These units are then arranged into rows
and columns.
Grid Cell Method. Soil sampling method in which samples are taken randomly from within grid cells and are then combined
to provide an average sample for the entire grid.
Grid Center Method. Soil sampling method in which samples are taken from the center of a grid cell. Also known as grid
point sampling or point sampling.
Grid Mapping. A mapping technique used to organize field data collected through soil sampling. A map layer is divided into
rows and columns of rectangular units. Each rectangular unit corresponds some field area and accompanying soil
characteristic.
Grid Sampling. Soil sampling method in which a field is divided into square sections (grids) of several acres or less.
Samples are then taken from each section and analyzed.
Ground Control Points. Clearly defined areas on the Earth’s surface that serve as reference points in a remote sensing
image.
Ground Truthing. Verification of the accuracy of data by actual field investigation of areas that have been remotely sensed.
It is important that ground truthing be done at the same time as remote sensing because of the rapid changes in field
conditions that may occur.
Ground Waves. The manner in which low-frequency radio signals, such as the U.S. Coast Guard differential correction
signals, travel. These waves are not blocked by hills or bluffs as FM radio signals are, since they follow the curvature of the
earth.
H
Hectare (ha). Metric unit equivalent to 10,000 square meters, or 2.47 U.S. acres.
Histogram. A bar graph that represents specific frequencies of a value.
Hyperspectral Sensors. Sensors that are capable of measuring electromagnetic energy from hundreds of individual
wavelengths simultaneously.
I
Impact Plate. A plate placed in the path of grain flow in the clean-grain system of a combine. The force with which the grain
strikes the plate is measured and used to estimate grain-flow rate.
Input Field. An area on a screen or panel where you are allowed to enter data.
Input Panel. A pop-up window which contains areas where you are to enter data.
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