The SHP button allows to export the wind rose as a
shapefile, which can be then viewed using a GIS (Geographical Information System) tool.
Note than only wind roses can be exported as shapefiles, not other types of plot.
After clicking the SHP button, the form for setting the shapefile options will appear.
The user must specify the metric or geographical (longitude and latitude) coordinates of the centre of the wind rose. These coordinates will be used for positioning the plot when it is loaded as a layer in a GIS. If the centre is specified by means of its longitude and latitude, the coordinates of all the points needed to build the wind rose will be in terms of longitude and latitude.
Longitude is positive along East; Latitude is positive in the Northern hemisphere.
The user also indicates the scale of the wind rose by means of its maximum size in metres.
The shapefile can be exported in any existing directory selected by the user and with any name.