The Edit Spatial Data window

The Edit Spatial Data window lets you view and edit spatial data. To open the window, select View > Spatial Data Sets:

Edit Spatial Data Window

Section

Area

Description

Record tree

Displays all records in the database.

Items that display in black text indicate records that have associated data. Grey records indicate no associated data.

Spatial data information

Displays the selected record (in the record tree) and the selected activity. Use the drop-down list to display data for other activities.

Activities that have data for the selected record display in black text, while grey activities indicate no associated data.

Visible Extents

Displays the minimum and maximum extents for the preview window.

These values are affected by the Display All Activities button in the preview window.

Clear button

Lets you delete the spatial data for the selected record and activity. You can also delete spatial data from all activities, all sets or all spatial data for child records (see Deleting spatial data for more information).

XPAC permanently deletes the spatial data and you will not be able to undo this action. If required, you can reimport spatial data (see Importing spatial data using the Spatial Data Wizard for more information).

Spatial data

Displays coordinates or general information about the selected record and activity.

The information that displays in this section depends on whether you are viewing a 2D or 3D data set (see Viewing 2D and 3D record information for more information).

3D Scene

Displays a preview of the data for the selected record and activity.

If you are viewing polygon spatial data, a blue marker displays in the 3D Scene to indicate the position of the selected coordinate in the data sheet.

Deleting spatial data

If required, you can delete data from records, all activities, all sets and child records so that you can reimport data.

Once you have deleted spatial data, you will not be able to undo this action.

1.	In the record tree, right-click the record that you want to delete spatial data for and select Clear Spatial Data. The Clear Spatial Data window displays.

2.	Select the check box of each option that you want to apply:

a.	Delete spatial data from all activities.

b.	Delete spatial data from all sets.

c.	Delete spatial data for child records.

Click OK.

XPAC deletes the spatial data from selected records as specified.

Simplifying tri-surfaces

The Simplify Tri-Surfaces dialog may be used to reduce the complexity of tri-surfaces without significantly affecting their appearance or the reported volume or surface area of the tri-surfaces. This has several benefits, including:

o	Reduces memory required for displaying spatial data plots

o	Reduces load time of spatial data plots

o	Increases the responsiveness of the 3D view

o	Improves performance of stage plans

The dialog allows previewing the effect of the various parameters to ensure an optimum level of simplification. To access it:

1.	In the record tree, select the individual record or parent record you wish to simplify. All child records of the select record will be included for processing.

Either:

a.	Right-click the record and select Simplify Tri-surfaces…; or,

b.	Select the View menu and select Simplify Tri-surfaces…

3.	Select which activities to include for processing.

4.	The Simplify Tri-Surfaces dialog will appear with the spatial data from the selected records and activities loaded into the preview.

See Simplifying Tri-Surfaces for more information about the Simplify Tri-Surfaces dialog.

Viewing 2D and 3D record information

The record information section in the Edit Spatial Data window displays 2D and 3D data differently. For example, 2D (polygon) data displays a set of coordinates that you can edit (if required):

Viewing 2D Polygon Data

Blank rows between coordinates in the data sheet indicate sub-polygons (gaps in the selected records). These are records that have multiple polygons for each activity and data set. XPAC automatically closes each sub-polygon that is not closed. You can use sub-polygons to include and exclude specific areas in a polygon using polygon holes.

3D data however, displays general information about the selected record, for example:

Viewing 3D Solid Data

XPAC does not let you edit 3D spatial data information.

Using the tools in the preview window

You can use the buttons in the 3D Scene to control the way the preview of the spatial data displays. For example, you can rotate, pan and zoom. The table below describes the buttons available in the 3D Scene:

Button	Name	Description
	Display All Activities	Displays all activities in the preview window for the selected record.
	Zoom / Zoom Out	Lets you zoom in or out in the preview window.
	Pan	Lets you move the preview in any direction without changing the angle or zoom.
	Rotate	Lets you rotate the preview to view it from other angles.
	Top View	Returns the preview to a top (plan) view.
	Zoom to Extents	Fits the whole spatial data plot neatly inside the preview window.