Rose diagram consists of wedges with lengths proportional to number of data, spanning angles representing the classes. The data you want to plot are your corrected, rotated poles from your original data, not the corrected planes (which are still in the program memory). I have a text file with length and orientation of lines. On the GeochemMap menu, select Point Plots and then select Rose (Sector) Plot. Rose diagrams are useful in geography fieldwork to analyse data containing magnitude and direction values. For non-directional data, it is conventional to duplicate each wedge on opposite sides of the rose diagram producing a 'bow tie' shape. A rose diagram shows the circular distribution of directional data. The vector theta, expressed in radians, determines the angle of each bin from the origin. Taking readings from the spokes is a little more difficult if they show wind speed frequency than if they show frequency alone - remember that each spoke shows total cumulative frequency for all wind speeds from that direction.A rose diagram plotting program for Windows written by Todd Thompson of the Indiana Geological Survey in Bloomington. For example, a frequency distribution for wind speed and direction for the month of June might be totally different for one in the same location in January. This information is needed if you are attempting to make any future predictions from the wind rose data.

the time period over which the readings were taken.

the location where the wind speed and direction readings were taken, and.

Two important pieces of information that should always be on a wind rose are:

To be useful a wind rose needs more information than that shown on the circular frequency distribution. Some wind roses carry further information by using colour codes on each spoke to represent different speed ranges with the frequency represented by the length of banding on the spoke. The centre of the rose represents a frequency of zero.

The frequency scale is usually shown as concentric circles, based on the centre of the rose, getting further from the centre with increasing frequency. The length of each bar or spoke shown in the circle represents the frequency of time that the wind blows from the direction it is pointing to. The compass directions are usually indicated around the outside of the rose, such as north (N), NNE, NE, ENE, E and on round to N. But they can be used to show much more detail than just the prevailing winds.Ī wind rose is usually shown in a circular pattern and shows the frequency of winds blowing from different directions. A simple description of a wind rose might be that it shows a graphical representation of the direction the wind blows from at a given location over a given period of time - the direction of the prevailing winds.

What is rose diagram