<P> The instrument is most commonly used to measure the lengths of roads , rivers and other line features on maps . Opisometers designed for this purpose provide scales reading the measured distance in kilometers and miles . </P>
<P> The instrument is most commonly used to measure the lengths of roads , rivers and other line features on maps . Opisometers designed for this purpose provide scales reading the measured distance in kilometers and miles . </P>
tool used to measure distance on a map
tool used to measure distance on a map
Opisometers
Opisometers