Gradient of elevation. One of the characteristics of terrain elevation. See gradient.

(gradient) In rectangular Cartesian coordinates, the rate at which the y-coordinate of a curve or a straight line changes with respect to the x-coordinate.

Percentage or degree change in elevation over a defined distance.

The slope of a line is its gradient, i.e. the change in the dependent or response variable () per unit change in the independent or predictor variable ().

the gradient of the line formed by plotting the change in the electrode response against change in activity of the ion measured. Theoretical Nernstian slope at 25°C is 59.16 mV per decade change in activity for a monovalent ion and 29.58 mV per decade change for a divalent ion. Slope values are often stated in % efficiency terms (an ideal slope of 59.16 mV for a monovalent ion - 100% slope efficiency). Slope values of less than 90% efficiency may be indicative of electrode contamination. However, many other factors will contribute to a loss of system performance.

The change in the value of the variable measured on the axis divided by the change the value of the variable measured on the -axis. (p. 29)

The amount of change in elevation.

Maximum gradient associated with the 3 dimensional attributes of a spot map pair.

The gradient of a stream or terrain.

Change in elevation, such as downhill or uphill.

Correction (within a Ph meter) for changes in the electrode's response from an ideal response.

A measure of the rate of change of elevation over a prescribed distance. Slope may be expressed as a ration, a grade, or as a percent.