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Toolbar
: Drawing Cleanup 
Menu
: GeoTools 
Drawing Cleanup
Analyze and fix Z elevation trends in 3D polylines.
 Command
line : GT_ZTREND
The GT_ZTREND command is
used to analyze and fix (or set) Z elevation trends in 3d polylines.
In many
3d mapping situations, it is often necessary to ensure that digitized 3d
polylines have consistently Upwards or Downwards flowing vertex
elevations. The GT_ZTREND command helps to check and ensure this. In many
instances of surveyed data, the elevation flow may temporarily be reversed
within a tolerance. The command can also identify such within-tolerance
reversals and fix the data
Elevation flow must be:
Upwards (increasing values): Checks if the polyline vertex is moving
downwards consistently.
Downwards (decreasing values): Checks if the polyline vertex is moving
downwards consistently.
Elevation reversal tolerance: Enter the tolerance within which the
reversal should take place.
Include closed polylines also?: Check this button to include processing
of closed polylines also.
Automatically correct elevation if within tolerance: Checking this button
causes the program to automatically correct polyline elevations when the
variation is within tolerance.
Toolbar
: Drawing Cleanup 
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: GeoTools
Drawing Cleanup
Remove Overlapping segments from lines selection
Command
line : GT_OVERLAP
The
GT_OVERLAP command is a very powerful tool to quickly remove completely or
partially overlapping line
segments.
Toolbar
: Drawing Cleanup 
Menu
: GeoTools
Drawing Cleanup
Delete duplicate entities
Command
line : GT_DELDUP
This
command deletes duplicate entities from the current drawing. You can apply
a linear tolerance value to determine how close the objects must be to be
considered a duplicate. It is possible to further check if geometric
duplicate entities have the same layer, Xdata, object data or Z value.
Toolbar
: Drawing Cleanup 
Menu
: GeoTools
Drawing Cleanup
Automatic line-work and point-work cleanup
Command
line : GT_NODELINESNAP
The
GT_NODELINESNAP command is used to perform drawing cleanup of linear
features and point features. This command fixes undershoot and overshoot
errors in line feature data, by snapping points in linear objects to
nearby linear or point features. Point feature data also can be cleaned by
snapping them to other points or lines in the vicinity.
The
‘Snap Type’ section specifies which (source) feature type will snap to
which other (target) feature type.
Linear
features include AutoCAD / BricsCAD lines, polylines, arcs or spline objects.
Point
or Node objects include AutoCAD / BricsCAD Point, Insert [Blocks] and Shape objects.
The command works equally well with both 2D and 3D objects. In case of a
3D object like a 3D polyline vertex, the snapping can be performed in
either XY directions only retaining the existing elevation (Z) or it can
snap in XYZ and inherit the elevation (Z) from the target object.
For
snapping to linear objects, two tolerances, ENDpoint and NEArest are
applied in that order around the point in question to search for the
target point. The priority and values of these tolerances are of
significance and must be set carefully after studying the data. First, the
ENDpoint snap is applied and it that fails, the NEArest snap is applied
next. Internally, the command uses the AutoCAD OSNAP function and these
tolerances are based on OSNAP.
The
ENDpoint and NEArest tolerances are applicable only when you are snapping
to a linear object. The NODe tolerance is applicable when you are snapping
to a point object.
The
Z snap tolerance ensures that only source and target points whose
elevation difference is lesser than this amount will only be snapped. This
tolerance is provided to prevent points having a very high elevation
difference from being snapped to each other.
Snap criteria for Line2Line / Line2Node: Additional snap criteria
for Line2Line and Line2Node snap modes determine whether all vertices or
only the end points will be considered for snap.
Snap Mode: (as
explained abov)
Snap
to objects within current selection only:
Checking this option causes the snap to be applied ONLY if the target
point falls on an object which belongs to the initial selection and not to
other objects in the drawing.
Snap
options:
This section provides options to mark and preview the points that would be
snapped, or to snap automatically without preview.
Toolbar
: Drawing Cleanup 
Menu
: GeoTools
Drawing Cleanup
Identify intersecting segments (Kinks) in polylines.
Command
line : GT_KINK
The KINK command detects and highlights kinks in
polylines. A kink is a "knot" or a "back twist”. A self
intersecting polyline. The KINK command helps identify these intersection points
so that remedial action can be taken. The kink can then be removed with the
Pedit or GeoTools Express Pedit command XV. The kink intersection is highlighted
as point objects in a temporary layer.
Note: Polylines which have kinks will fail when used as selection boundaries in
the ESELECT command.
Toolbar
: Drawing Cleanup 
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: GeoTools
Drawing Cleanup
Break crossing objects at ends of polylines
Command
line : GT_BREAKX
The
GT_BREAKX command breaks polylines and lines located at the ends of
selected lines and polylines. This command is often better than the
equivalent tools in AutoCAD Map
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: Drawing Cleanup 
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: GeoTools
Drawing Cleanup
Lineworks Intersection processor
Command
line : GT_INTEX
The
GT_INTEX command is useful in processing a network of intersecting
polylines. Using this command, polylines can be either broken (split) at
their intersections or have a vertex added at the intersecting points. The
command requires one or two selection sets of polylines to be defined
- a source selection set and an optional target selection set. The source
selection can be made to work on the target selection i.e. the source
selection set objects look for intersections with the target selection set
objects. Or, you can have the source selección set objects look for
intersections with objects within itself.
The ‘Object Break’ and ‘Vertex Add’ operations can be applied
either on the source, target or both selection sets.
Important
note:
The GT_INTEX command works only with polyline objects (both 2d as well
as 3d). They must contain only linear segments and must not be
splined, fitted or contain arc segments. If you have source objects
that intersect with target objects that are 3d polylines, make sure that
your source objects are defined as 3d polylines. If you have source
objects that intersect with target objects that are 3d polylines, make
sure that your source objects are defined as 3d polylines. Else, the
interpolation will be incorrect.
The
following related commands in GeoTools may be useful in preparing correct
data for use by the GT_INTEX command.
GT_CH3D2D, GT_CH2D3D,
GT_PLARC2PL, GT_PL_STAT,
GT_SET_Z_PL.
Toolbar
: Drawing cleanup 
Menu
: GeoTools
Drawing Cleanup
Check for free ends (dangles) of lines, polylines and arcs.
Command
line : GT_DANGLECHECK
The GT_DANGLECHECK command is
useful to detect free standing ends of polylines, lines, arcs and splines, also
known as dangling ends. A user-defined search window tolerance is applied around
the ends and if there is no other object in the vicinity, the end is treated as
a free standing end or a dangle. All such end points are marked with POINT
objects in the GeoTools temporary layer "GEOTOOLS_TEMP" so that they
can be easily checked.
Search Window Size around endpoints: Enter
the value for search window around the objects endpoints.
Toolbar
: Drawing cleanup 
Menu
: GeoTools
Drawing Cleanup
Create right angle corners
Command
line : GT_HSQUARE
The
GT_SQUARE command is a building squaring tool. It adjusts the angles of a
polyline such that they form an exact right angle between adjacent
segments. You can set an angle tolerance value to determine segments that
should be adjusted. This tool is useful for fixing building edges
(captured from satellite imagery) which are skewed because of camera or
terrain tilt.
Toolbar
: Drawing cleanup 
Menu
: GeoTools
Drawing Cleanup
Weed points based on spacing
Command
line : GT_POINTWEED
The GT_POINTWEED command removes points (or
blocks) which are closer to each other by a user-specified distance.
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Drawing Cleanup
Check for coincident (XY) points with varying Z
Command
line : GT_ENDELEVCHECK
The
GT_ENDELEVCHECK command is used to check the two end points of linear
objects like lines, polylines, splines and arcs to see if there are other
linear objects whose either end-point is at the same XY but different Z
location. Optionally, a vertical line can be drawn connecting the two
coincident points.
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:
GeoTools
Drawing Cleanup
Set all 0 elevation vertices to nearest non-zero elevation.
Command
line: GT_SET_Z_PL
Often, you may have polylines in which some vertices
have a zero [0.0] elevation while others have non-zero elevations. This command
sets the Z values of those zero elevation vertices to the nearest non-zero
vertex elevation value. The command scans through the polyline and seeks a
non-zero value nearest to it and assigns it to the vertex. Thus, at the end of
the command run, there will not be any polyline vertices, which are of 0.0
elevation. Therefore, this command is best used when you are sure that there
should not be any vertex of elevation = 0.0 anywhere along the polyline.
GT_SET_Z_PL Tutorial
 Toolbar
: Drawing cleanup 
Menu
:
GeoTools
Drawing Cleanup
Make polylines/3dfaces planar.
Command
line: GT_PLANARPOLY
The GT_PLANARPOLY command is used to make a polyline or 3dface planar. A planar polyline or 3dface is one in which all the vertices can be placed on a single plane. Generally, this is possible only if all the vertices have the same elevation or, in the special case of a 4-vertex polyline, the polyline can be considered planar if two pairs of adjacent vertices have the same elevation. The GT_PLANARPOLY command makes this happen by setting the elevations of adjacent vertices same if they are within a specified tolerance. The need to create perfectly planar polylines or 3dfaces is often required and useful in photogrammetry data capture and rendering applications.
Toolbar
: Drawing cleanup 
Menu
: GeoTools
Drawing Cleanup
Remove all unreferenced scales
Command
line : GT_SCALECLEAN (AutoCAD only)
The
GT_SCALECLEAN command removes all un-referenced scales. There is a bug in
AutoCAD which causes the SCALELISTEDIT command to keep displaying all scales
from any XREF drawings that are already detached. The GT_SCALECLEAN command
helps to get rid of all these un-referenced scales by removing the entries from
the AutoCAD dictionary.
Toolbar
: Drawing cleanup 
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: GeoTools
Drawing Cleanup
Detaches all unreferenced X-Refs and binds all others into current DWG
Command
line : GT_BINDXREF
This
is a cleanup tool that performs a most commonly needed requirement of CAD
users before packing their drawings off to outside agencies - remove all
unresolved external references and bind all valid attached xrefs.
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