02_pointcloud_data.rst

Editing [Point Cloud Data]

[Point Cloud Data] consist of coordinates and attribute at that point. image_example_pointset_data shows an example of the [Point Cloud Data].

The [Point Cloud Data]

Menu items

When the [Pre-processing Window] is active and [Point Cloud Data] is selected in [Object Browser], you use can access menu items related to operations on [Point Cloud Data] under the following:

Menu bar: [Geographic Data] (E) --> [Point Cloud Data] (O)

geo_pointset_menuitems_table shows the menu items under [Point Cloud Data] (O).

The menu items under [Point Cloud Data]

Menu item	Description
[Edit Name] (N)	Edits the name shown in [Object Browser].
[Select Points With Polygon] (P)	Select Points inside the polygon region that user define by mouse operation.
[Edit Selected Points] (E)	Select the value at the selected points.
[Export Selected Points] (X)	Export the selected points to an external file.
[Add New Point] (A)	Adds new points.
[Interpolate Points] (I)	Interpotate new points.
[Delete Selected Points] (O)	Delete selected points.
[Delete Selected Points Less Than Value] (L)	Delete points that is selected and the value is less than that user specify.
[Delete Selected Points Greater Than Value] (G)	Delete points that is selected and the value is greater than that user specify.
[Add Break Line] (B)	Add break line.
[Remove Break Line] (R)	Remove break line.
[Remove All Break Lines] (O)	Remove all break lines.
[Remesh TINs] (T)	Remesh TINs.
[Merge]	Merge other [Point Cloud Data] to this data
[Remove triangles with long edge] (W)	Remove triangles with long edge.
[Display Setting] (S)	Edit display setting.
[Delete] (D)	Delete the [Point Cloud Data].

[Select Points With Polygon] (P)

Description: Defines a polygon region, and select points within that polygon.

Click on canvas region to specify polygon vertices positions sequentially. By double-clicking or pressing Enter key, the polygon is defined and the points within that polygon are selected. image_pre_window_defining_poly_region shows an example of the [Pre-processing Window] while defining a polygon region. image_pre_window_after_sel_poly_region shows an example of the [Pre-processing Window] after selecting.

The [Pre-processing Window] while defining a polygon region

The [Pre-processing Window] after selecting points within the polygon region

In normal status, points can be selected with left-dragging.

[Edit Selected Points] (E)

Description: Edits the selected points.

When you select [Edit Selected Points], the [Edit Points] dialog (image_pre_edit_points_dialog) will open. Input new Value at the selected points, and click on [OK].

The [Edit Points] dialog

[Export Selected Points] (X)

Description: Exports the selected points to an external file.

When you select [Export Selected Points], the [Select file to export] dialog (image_pointset_select_file_to_export_dialog) will open. Input the file name to export and click on [Save].

The [Select file to export] dialog

[Add New Point] (A)

Description: Adds new points.

When you select [Add New Point], select a point that already exists first. The value at that point will be the default value at the points you are going to add. Then, click on the canvas where you want to add new points. Finish by double-clicking or by pressing Enter key. The [Add Points] dialog (image_pointset_add_points_dialog) will open, so input the Value at new points and click on [OK].

image_example_adding_new_points shows an example of [Pre-processing Window] while adding new point.

The [Add Points] dialog

Example of adding new points

[Interpolate Points] (I)

Description: Adds new points between points that already exists.

After you select [Interpolate Points], click on multiple points that already exists, between which you want to interpolate points. Finish by double-clicking or pressing Enter key. The [Dialog] (image_pointset_interpolate_settiing_dialog) will open, so edit the setting and click on [OK] to interpolate points.

image_example_pointset_interpolate_points shows an operation of interpolating points.

The [Dialog]

Example of interpolating points

[Delete Selected Points] (O)

Description: Deletes the selected points. image_example_pointset_delete_points shows an example.

Example of deleting selected points.

[Delete Selected Points Less Than Value] (L)

Description: Deletes the points that are selected, and have value less than that you specify.

When you select [Delete Selected Points Less Than Value], the [Delete Points] dialog (image_pointset_delete_points_dialog_less_than) will open. Input the value and click on [OK]. image_pointset_example_delete_points_less_than shows an example.

The [Delete Points] dialog

Example of deleting selected points less than the specified value.

[Delete Selected Points Greater Than Value] (G)

Description: Deletes the points that are selected, and have value greater than that you specify.

When you select [Delete Selected Points Greater Than Value], the [Delete Points] dialog (image_pointset_delete_points_dialog_greater_than) will open. Input the value and click on [OK]. image_pointset_example_delete_points_greater_than shows an example.

The [Delete points] dialog

Example of deleting selected points greater than the specified value.

[Add Break Line] (B)

Description: Adds break line.

After you select [Add Break Line], click on the points sequently between which you want to add break line. Finish by double-clicking of pressing Enter key.

When you [Remesh TINs], break lines will be used as TIN boundary lines. image_pointset_example_tin_boundarys_after_add_breakline shows an example.

Example of TIN boundarys after adding break line

[Remove Break Line] (R)

Description: Removes break line.

After you select [Remove Break Line], click on the break line you want to remove. The [Warning] dialog (image_pointset_remove_breakline_warning_dialog) will open, so click on [Yes] to remove the break line.

The [Warning] dialog

[Remove All Break Lines] (O)

Description: Removes all break lines.

When you select [Remove All Break Lines], the [Warning] dialog (image_pointset_remove_all_breaklines_warning_dialog) will open. Click on [Yes].

The [Warning] dialog

[Remesh TINs] (T)

Description: Remesh TINs that are used for interpolation.

Remeshing TINs will be necessary when points are added or removed, and/or break lines are added or removed. image_pointset_example_remesh_tin shows an example of remeshing TINs.

Example of remeshing TINs

[Remove triangles with long edge] (W)

Description: Remove triangles with long edge from TIN.

When TIN is generated, triangles with long edge are sometimes generated in area in which there is not points. Using this function, you can remove such needless triangles.

When you select [Remove triangles with long edge], dialog (image_pointset_removetri_dialog) will open. Specify the Limit edge length, and click on [Apply].

You'll see that the triangles with edges longer than limit edge length are shown as gray area. If you need to, you can change limit edge length, and click on [Apply] again. If it seems OK, click on [OK] button to finish the operation.

image_pointset_removetri_before shows an example of [Point Cloud Data] before removing triangles, image_pointset_removetri_apply shows an example of [Point Cloud Data] after clicking [Apply] button, and image_pointset_removetri_apply shows an example of [Point Cloud Data] after removing triangles, for each.

[Remove triangles with long edge] dialog

[Point Cloud Data] before removing triangles

[Point Cloud Data] display example after clicking [Apply] button

[Point Cloud Data] after removing triangles

[Merge]

Description: Merge points in other [Point Cloud Data] to this data.

When you select [Merge], the [Select data to merge] dialog (image_pointset_merge_dialog) will open. Select the data to merge, and click on [OK] button. Them, the [Point Cloud Data] is merged, and the [Remesh TINs] is executed.

When you've imported [Point Cloud Data] for neighbor regions as separate data, it happens that when the [Point Cloud Data] is mapped to grid attributes, values are not mapped correctly to nodes (or cells) in the boundary region of those data. In such cases, executing mapping after merging the data will solve the problem.

[Select data to merge] dialog

[Display Setting] (S)

Description: Changes display setting of [Point Cloud Data].

[Point Cloud Data] can be visualized in the three methods: [Points], [Wireframe], and [Surface]. image_pointset_display_methods shows the three methods.

[Point Cloud Data] display methods

When you select [Display Setting], the [Display Setting] dialog (image_pointset_display_setting_dialog) will open. Change settings and click on [OK]. [Transparent] is active only when you select [Surface] for [Display Method].

The [Display Setting] dialog