Calculating Slopes In Autocad
Solved: I would like to learn how to calculate the intersection of two slopes. Kowns are start elevations and slopes of the two slopes and the.
By Jim Riesterer. Edited by Scott Hughes, Dan Narsavage & Diana Boyack Topographic Maps Tutorial Topographic Maps Field Exercises geostac@gmail.com April 8, 2008 Calculating a Slope Determining the average slope of a hill using a topographic map is fairly simple. Slope can be given in two different ways, a percent gradient or an angle of the slope. The initial steps to calculating slope either way are the same. Decide on an area for which you want to calculate the slope (note, it should be an area where the slope direction does not change; do not cross the top of a hill or the bottom of a valley). Decide on an area for which you want to calculate the slope (note, it should be an area where the slope direction does not change; do not cross the top of a hill or the bottom of a valley). Once you have decided on an area of interest, draw a straight line perpendicular to the contours on the slope.
For the most accuracy, start and end your line on, rather than between, contours on the map. Measure the length of the line you drew and, using the scale of the map, convert that distance to feet. (insert image with the line drawn on it, conversion calculation). Determine the total elevation change along the line you drew (subtract the elevation of the lowest contour used from the elevation of the highest contour used). You do not need to do any conversions on this measurement, as it is a real-world elevation change.
How To Calculate 2% Slope
Cake mania back to the bakery download. To calculate a percent slope, simply divide the elevation change in feet by the distance of the line you drew (after converting it to feet). Multiply the resulting number by 100 to get a percentage value equal to the percent slope of the hill. If the value you calculate is, for example, 20, then what this means is that for every 100 feet you cover in a horizontal direction, you will gain (or lose) 20 feet in elevation.
To calculate the angle of the slope, divide the elevation change in feet by the distance of the line you drew (after converting it to feet). This is the tangent value for the angle of the slope. Apply an arctangent function to this value to obtain the angle of the slope (hit the ‘inv’ button and then the ‘tan’ button on most scientific calculators to get the slope angle). The angle you calculated is the angle between a horizontal plane and the surface of the hill. Using the example above, (click here or on image for larger picture) a hill with a 20% slope is equivalent to an 11° slope.
Calculating Slopes In Excel
Congrats on your 1st post, I see you've been a spectator quite a while now Anyhow, to get the angle of a point on a polyline, the easiest way I know of is to use the vlax-curve. They're not easy to understand at first, but once you figure out what they do they're very powerful indeed. You picked the entity using entsel. This would give you both the ename and the point clicked. From this you can use those functions to get just about anything regarding the entity (it doesn't matter if it's an arc, line, old polyline, new lwpolyline, spline, whatever. To make this a bit easier, here's an example. Code:; SLOPE Labeler for: Profile Lines; BY: TOM BEAUFORD; LEON COUNTY PUBLIC WORKS SURVEY & R/W SECTION (defun C:slope (/ up-dn tom tommy rem rem1 pt1 pt2 azrad stylet entlay pt3 txt elist txtpt) (initget 'Yes No') (or (setq str1 (getkword ' nBelow Line?