Magellan DirectRoute 3.0 Manual de usuario descargar pdf (Pagina 97)

Da-

Fil-

ters

This option specifies the maximum distance a point may be from the central point in order to remain in

the dataset. Points closer than this distance will be kept and points further away will be removed (unless

the exclude option is specified.)

Distances may be expressed in miles (3M) or kilometers (4K). If no units are provided, the distance is

assumed to be in miles.

exclude option

Exclude points close to center.

If this option is included, the action of the radius filter will be reversed: points within the given distance

will be removed, and points further away will be kept.

nosort option

Inhibit sort by distance to center.

If this option is specified, the radius filter will not sort the remaining points by distance from the center.

They will remain in whatever order they were originally.

maxcount option

Output no more than this number of points.

This option specifies the maximum number of points that the radius filter may keep. If there are more

than this number of points within the specified distance of the center, the more distant points will be

discarded even though they are within the specified distance. If this option is not specified, all points are

kept regardless of how many there are.

Note that if the nosort option is also specified, this option will instead keep points based on their position

within the input file rather than on their distance from the center. This may or may not be what you want.

Note, too, that this option may be used with the exclude option, but the results might not be what you

expect. In particular, the results will not be the same as if you had kept all of the points you'd otherwise

throw away. You will still get no more than maxcount points, but they will all be at least distance

away from the center. (And possibly sorted.)

asroute option

Put resulting waypoints in route of this name.

This option specifies the name of a route. If this option is specified, the radius filter puts all points that

are kept into a route with the given name. The order of points in the route is by distance from the center

(unless the nosort option is also specified.)

Note that this route is not necessarily the most efficient route to visit all of the points. In fact, for some

data sets, it might be the least efficient route.

Interpolate between trackpoints (interpolate)

This filter modifies any tracks so that either the distance or the time between consecutive points is no

less than the specified interval. Where points are missing, the filter fills them in by following a straight

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Magellan DirectRoute 3.0 Manual de usuario Pagina 97