However, if such data are stored within a GIS as attributes in a table associated with a point set, then conventional descriptive statistics such as mean and variance should not be used. As such this is simply a particular application of such statistics to a defined dataset. For example, these might be: recordings of the initial migration direction of birds of various types from a small area of woodland the dispersal pattern of seeds from a tree the wind direction recorded at a series of meteorological stations at hourly intervals or the direction of a particular type of crime event in a city with respect to a given reference point. In addition to line-based data from which orientation is derived, the same types of analysis may be applied to point datasets with an associated directional attribute or attributes. Hence all such datasets need to be examined carefully before proceeding with analysis. This directed aspect of the line may or may not be relevant, and if relevant may be incorrect for the analysis you are considering. Line elements within a GIS are normally directed, in the sense that they have a start and end point determined during data capture. It is also in concordance with the earlier reported subsurface geo-electrical structural trend inferred from magnetotelluric (MT) study and hence hints towards the possible link between the subsurface structures and processes as guiding control for the movement of glaciers.Directional analysis applied to linear forms (line segments, polylines, or smooth curves) is sometimes known as alignment analysis or lineament analysis.

The Moving Average Rose Diagram (MARD) calculated resultant direction for the flow of glacier in the Schirmacher Oasis deduced at 15☎. The data shows NNW-NNE direction for the advance of palaeoglaciers which are in agreement with the present movement of glaciers deduced from the Global Positioning System reported earlier. The majority of the data is unidirectional with few having bidirectional orientation suggesting changes in the movement of glaciers with time. Orientation data for 276 glacial striations at 20 locations were collected and further analysed for quantification of the direction of past glacial movements. In the Schirmacher Oasis, central Dronning Maud Land, East Antarctica systematic observations were made to collect the orientation data of well-preserved glacial striations.

Glacier Striations are the scratches and grooves formed by abrasion on the surface of bedrock over which a glacier moves.

Online rose diagram orientation data