Table of Contents
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Topo USA User Guide
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Line objects are those objects consisting of line segments and points, such
as:
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Routable Roads
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Routable Trails
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Tracks
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Lines
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Arcs
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Splines
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Area objects are those objects consisting of one or more closed line objects,
such as:
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Polygons
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Rectangles
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Circles
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Point objects consist of one anchor point attached to either a waypoint,
symbol, MapNote, image, or text label. The anchor point is the pixel position
on the symbol that corresponds to the geographic coordinate of the point
selected on the map when the symbol is placed.
Draw objects added to a draw file contain points that give the object its shape or
allow you to snap one object to another object. Points display and act in different
ways within the various draw objects. Click a link below to view additional
information.
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Points in Routable Roads, Routable Trails, Tracks, Lines, Splines, and
Polygons
Draw objects such as routable roads, routable trails, tracks, lines, splines, and
polygons consist of shape points and end points.
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Shape points are the points you place on the map when creating the
object. They give the object its shape. When you select a draw object
on the map, shape points display along the active object as small
magenta squares.
The line object below was drawn with the spline tool.
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End points are the first and last points of individual line segments on a
draw object. When you select a shape point of a line segment within
an active line, spline, or polygon:
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A small green circle indicates the start end point of the selected
line segment.
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A small red circle indicates the last end point of the selected line
segment.
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