Simulator 16 User Guide - PowerWorld

Great Circle Distance Dialog
To find the Great Circle Distance between any two points of longitude, latitude, select GIS Tools >
Great Circle Distance from the Active ribbon group on the Onelines ribbon tab and the Great Circle
Distance Dialog will be displayed. This can be done in Edit or Run Mode.
The Great Circle Distance Dialog allows the calculation of distance between two points of longitude,
latitude. The Great Circle Distance Calculation assumes that the earth is a sphere and makes no
adjustments for the actual flattening of the earth. The two longitude, latitude points can either be
entered manually for any two valid points or can be chosen from valid longitude, latitude values stored
with either buses or substations. Valid longitude values are between -180 and 180 degrees. Valid
latitude values are between -90 and 90 degrees. The calculated distance is given in either kilometers
or miles.
From Location
Click the Choose From Location button to choose either the location of a bus or substation as the
From Location. The Latitude (degrees) and Longitude (degrees) entries for the From
Location will be filled in with the latitude, longitude information that is stored with the chosen
element in the case data. These entries are not based on the location of a display object, if one
exists, of the chosen element. If the element does not have valid geographic information stored, the
values that are entered for the latitude, longitude will not be valid.
The Latitude, Longitude entries can also be entered manually.
To Location
Click the Choose To Location button to choose either the location of a bus or substation as the To
Location. The Latitude (degrees) and Longitude (degrees) entries for the To Location will be
filled in with the latitude, longitude information that is stored with the chosen element in the case
data. These entries are not based on the location of a display object, if one exists, of the chosen
element. If the element does not have valid geographic information stored, the values that are
entered for the latitude, longitude will not be valid.
The Latitude, Longitude entries can also be entered manually.
Units
Choose the units in which to report the calculated distance.
Calculate Distance
Click this button to calculate the distance in the chosen Units between the From Location and the
To Location. The calculated distance will appear in the box above the button. Error in input data will
be returned if there is a problem with any of the latitude, longitude information.
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