Refers to a level of coordinate accuracy based on the number of significant digits that can be stored for each coordinate Single precision numbers store up to 7 significant digits for each coordinate, retaining a precision of +5 meters in an extent of 1,000,000 meters Double-precision numbers store up to 15 significant digits (typically 13 to 14 significant digits), retaining the accuracy of much less than one meter at a global extent ARC/INFO data sets can be stored as either single- or double-precision coordinates See also double-precision
An internal representation of numbers that can have fractional parts Single-precision numbers keep track of fewer digits than do double-precision numbers, but operations on them are sometimes less expensive in terms of CPU time This is the type used by some very old versions of awk to store numeric values It is the C type float
Pertaining to the use of one computer word to represent a number, in accordance with the required precision I