Magellan DirectRoute 3.0 Manual do Utilizador descarregar pdf (Página 95)

Da-

Fil-

ters

The arc is defined in a file whose name must be provided with the file. That file contains pairs of coor-

dinates for the vertices of the arc, one coordinate pair per line. Comments may be included by preceding

them with a '#' character. An arc file looks something like this sample:

# Lima Road/SR3 north of Fort Wayne, Indiana

41.150064468 -85.166207433

41.150064468 -85.165371895

41.149034500 -85.165157318

41.147832870 -85.164771080

41.146631241 -85.164384842

41.144270897 -85.163655281

41.141953468 -85.162882805

An arc file may optionally contain gaps in the arc. You may specify such a gap by inserting a line containing

"#break" either on a line by itself or after the coordinates of the starting point of the new arc segment.

Example 4.3. Using the arc filter

Assuming the arc above is in a file called lima_rd.txt, the following command line would include

only points within one mile of the section of Lima Road covered by the arc.

gpsbabel -i geo -f 1.loc -x arc,file=lima_rd.txt,distance=1 -o mapsend

-F 2.wpt

file option

File containing vertices of arc.

This option is required.

This option specifies the name of the file containing the arc to use for filtering. The format of the file is

as described above.

GPSBabel supports converting any route or track to a file usable by this filter; simply read it in the normal

way and write it using the arc file format.

distance option

Maximum distance from arc.

This option is not required, but if it is not specified the distance defaults to zero miles, which isn't very

useful.

This option specifies the maximum distance a point may be from the arc without being discarded. Points

that are closer to the arc are kept, while points that are further away are discarded.

Distances may be specified in miles (3M) or kilometers (5K). If no units are specified, the distance is

assumed to be in miles.

exclude option

Exclude points close to the arc.

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