A line feature layer must be loaded into ArcMap in order to use this tool. Select the line layer
you wish to process from the drop-down box. Select a unique ID field from the drop-down box. Type in the
distance interval between points (must be in the same units as the coordinate system of the data layer:
i.e. meters for UTM, feet for SPC, etc). If you select the "Add XY coordinates to output table" option,
X and Y fields will be added to the point attribute table. If you select the "Add turning angles to output
table" option, the turn angle in degrees will be added to the point attribute table (note that three
consecutive points are needed to calculate a turn angle, so the first and last points are coded with a
NoData value of -999).
Directionality of lines.
Every line has an inherent direction, which usually is a function of the order in which points were
digitized/generated when the line was created. (I say usually because there are editing operations
and programs that can change the direction). If you view a line as a collection of points (i.e. a start
node, vertices, and a finish node), this tool always places the first output point at the location of
the first point in the collection, and subsequently works along the line towards the end. This may be an
important issue in cases where the directionality of the line is important (e.g. movement paths). Also
note that it is very rare that an output point will be placed at the exact end of the arc because
there is usually segment of path left over that does not meet the interval distance.