Ag Leader SMS Basic and Advanced Manual - Manual (Page 154)

SMS Basic and Advanced Manual
A data format that stores and displays data as lines rather than grid cells. Vector data displays lines, polygons, etc in
an almost continuous form, providing more appealing presentation on maps and more accurate spatial operations.
Frozen boundaries, polylines, and polygons are examples of vector data.
Interpolation
A process of predicting unknown values at locations between known data points. Many different interpolation methods
exist, but the software utilizes the Inverse Weighted Distance and Kriging methods. Interpolation is a critical process
for datasets that are very sparse, such as soil sampling results, yet cover a large area.
Grid Map
A map created by converting an area to rows and columns of rectangular grids that cover the data area. The values
created for each cell are interpolated in most cases. Grid mapping is very useful soil sampling and prescription
datasets.
Contour Map
A map created using an interpolation method that represents the data as smoothed regions bounded by lines. The
closer the spacing of the lines the more frequently the data values are changing across the area being mapped.
Contour maps are very useful for better visualizing data trends and simplifying dense or sparse datasets.
Logical Value (Boolean)
A logical data type that always produces one of two possible value results, such as YES/NO or TRUE/FALSE. An
example would value for Area Count, which would either be On or Off.
Selection List (Enumerated)
A list of data values that have been assigned unique ID’s. This allows the selection of data values from a fixed list of
selections thus ensuring consistent value selection. An example would be Soil Texture and the enumerated list of
values that can be selected from.
Discrete
A unique whole number or string value. An example would be a seeding rate of 45,000 seeds/ac.
Unique Decimal Number (Discrete Float)
A value that is discrete (non-continuous) but does contain a decimal place of precision. An example might be a soil pH
value of 7.6 or a rainfall gauge reading of 10.25 mm.
Decimal Number (Float)
A value that contains decimal places of precision and is not discrete (non-continuous) in nature. An example would be
a yield value of 145.45 bu/ac.
Text (String)
A combination of symbols, characters, or numbers that are treated as a whole and not as a numerical format. An
example would be a Field or Load Name.
Integer
A positive or negative whole number such as 1, -1, etc. or 0. An example would be a Load ID or Marks Count value.
Epoch
A period of time marked by an event. An example would be the creation of a new calibration for a harvest season.
GPS Coordinate Conversions
The system only accepts import files that have Latitude and Longitude formatted in the Degrees Decimal format. This
is the same format that the YM2000, PF3000, and PF3000 Pro log GPS data.
The following examples and equations will assist in any conversions that may need to be applied to the data that will
be imported.
Convert Degrees, minutes, seconds (43
 02’ 32") to Degrees, decimal degrees:
1. Divide 32" by 60 = .5333
2. Then Add .5333 to 02’ = 2.5333
3. Now divide 2.5333 by 60 = .04222
4. Finally, add 43 to .04222 = 43.04222
148