Data Extraction
•
Checking Merge into original ModelSpace will copy all contents of the closing
ModelSpace and paste into the original ModelSpace from which it was
launched.
•
Checking Remove link from original ModelSpace removes any association that
the closing ModelSpace was originally launched from its parent ModelSpace. In
other words, the Closing ModelSpace Viewer dialog will not be displayed next
time this ModelSpace is closed.
•
Checking Delete after close will delete the ModelSpace being closed.
8) Click the Close button without making any checkmarks in the Closing ModelSpace Viewer
dialog.
9) In the Navigator, rename Copy of ModelSpace 1 to something descriptive, such as East
Facade.
10) In the original ModelSpace View, press spacebar to deselect everything.
In essence, point cloud sub-selection is useful for visualizing and isolating points. We will use the
methods covered in this section throughout this module to select points that we want to fit
surfaces to.
1.3 Segmenting a Point Cloud
Segmenting a point cloud means cutting a point cloud into two pieces. The segmenting
commands are located under Create Object | Segment Cloud
Create Object | Segment CloudCreate Object | Segment Cloud
Create Object | Segment Cloud…
In the following example, we will sub-select the same west facing building facade we worked
with in section 1.2, segment those points, then put them on their own layer.
1) In the registered ModelSpace, sub-select the same west facing wall as we did in section 1.2.
Remember to select the points using the sub-selection commands from at least 2
viewpoints.
2) Click Create Object | Segment Cloud | Cut Sub
Create Object | Segment Cloud | Cut SubCreate Object | Segment Cloud | Cut Sub
Create Object | Segment Cloud | Cut Sub-
--
-Selection
SelectionSelection
Selection.
3) Press the spacebar to deselect everything, and then in pick mode, pick the newly segmented
point cloud objects.
Segmenting a cloud creates separate objects; care should be taken when
segmenting point clouds as not to create too many unnecessary “pieces” of
point clouds that may slow down performance.
4) Click View | Layers
Click View | LayersClick View | Layers
Click View | Layers…
5) In the Layers tab, click the New button. Name the layer East facade.
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