Slope At Points

This command reports and labels the slope of a triangulation or grid surface model. The Position Method for Surface Points creates a label at each data point in the surface which can work well on grid files but is typically too much information for triangulated surface files. The Position Method for Screen Pick prompts to pick the points where to calculate the slope. For the Screen Pick method, the Define Slope setting allows a couple ways to pick. The At Single Point option calculates the slope from the surface model at the point. The Between Two Points method calculates the slope using the surface model elevations at two picked points and the horizontal distance between these points. As the crosshairs are moved across the surface, the slope at the current position is displayed in a floating dialog box.

For the slope labels, the dialog has settings for the Layer, Style, Prefix, Suffix, Decimals, Slope Label Format and Size Scaler. The Size Scaler is multiplied by the drawing horizontal scale to calculate the text size in drawing units. The Create Report option uses the Report Formatter to make a report of the coordinates, slope amount and slope direction.

The Label Style of Align With Slope rotates the slope label in the slope direction. The Horizontal option creates a horizontal label. The Leader Arrow rotates the slope label in the slope direction and draws a leader arrow for the slope direction either facing uphill or downhill depending on the Arrow Direction option.

The Draw Box Around Label option draws a polyline box around the slope labels and the Solid Background option fills in this box with the specified color.

The Set Layer/Size/Color By Slope Ranges option invokes the Define Ranges dialog box. Enter slope values in the first column of boxes to set the Ranges.

Prompts

Slope At Points dialog box
Adjust settings as desired. Pick OK.
Select Surface Model.
Pick Points to label slope.

Draw grid file and Slope At Point labels using Surface Points

Pulldown Menu Location: Surface >> Slope Analysis
Keyboard Command: ptslope
Prerequisite: A surface model file (.TIN, .GRD, or .FLT)