Acción estática sobre pantallas flexibles

The Analyse toolbar (or Analyse > Details) is used to gather details of an object such,

coordinates of a point, distance between points, and distance along a line. More information is found under Envisage : Toolbars : Analyse in the Vulcan Help.

Figure 8-1: Analyse toolbar

Coordinate

Use Coordinate to report the northing, easting and elevation of a point. A point can be an existing point, selected using the snap to points button on the Digitise toolbar, a point on a line picked with the snap to objects button, or a point digitised in space. The coordinates will be displayed in the Report window.

Right-click once to exit the command.

Distance Between Points

The Distance Between Points option measures the linear distance between two designated points, which not only is the distance reported, but also the difference in level, the bearing and the gradient of the line between the two points. The total length reported will always be greater than the plan length should the two points be on different levels.

Right-click once to exit the command.

Distance Along Line

The Distance Along Line option determines the total length of the line segments between the nominated start and end points. It gives a 2D and 3D distance measured along the path of the line segments. A quick way of determining or positioning an object at a specified location distance and position is to use a custom cursor.

Right-click once to exit the command.

Coordinate

94 8 Analysing Data Custom Cursor

To access a custom cursor, the custom cursor icon must be active (Graphics toolbar). Right-click the icon to modify the properties.

Figure 8-2: Custom Cursor Properties dialog box

The scaled cursor will change accordingly when zooming in or out. However, the fixed cursor will not dynamically scale up or down but will remain the specified size.The specified size for the cursor is from edge to edge of the cursor. For example, if Circle is checked as the Scaled Cursor, then the specified size is the diameter of the circle.

Area

Use Area to define the section to be measured by drawing a polygon around the objects of interest. The viewed layers must be in plan view, otherwise the user defined area will not represent the area that is being measured. If the layers are in orthogonal view, the snap to point or snap to object curser options can be used. Right-click to close the polygon and exit the command. The output will be displayed in the Report window.

Polygon Area

Use Polygon Area to measure the planar areas of selected polygons and use those areas to compute volumes. This option also includes the ability to calculate the area of ‘doughnut’

polygons (polygons within polygons). The calculated volumes and areas are shown in the Vulcan Envisage Report window.

The polygon must already exist and be loaded on-screen.

When selected, the Object Area dialog box will display where the area and volume units can be specified. Furthermore, the thickness can be specified if a volume is desired.

Right-click once to exit the command.

Tutorial 8.1

Find the surface area (in square metres) of asphalt needed to pave the roads located in the ROADS layer.

Custom cursor icon

Data Information 95 Table 1: Other Analyse Options

Command Definition

Centroid Finds coordinates of the centroid (gravitational centre point of a two or three dimensional object) or for closed polygons and closed

solid triangulations. The output (centroid coordinates) is shown in the Report window.

Full Gathers detailed information on the objects. In addition, you can select one string from an object and obtain details for that specific string. Such information as enclosed area of an object, and grades

of the segments, can be found here.

Curvature Used for graphical elements (lines, polygons) with a minimum of three points. Click any point of the object (except the endpoints) to

report the radius and the centre coordinates for the circle which goes through the selected point plus two points on either side of

the selected point.

Strike/Dip Provides Vulcan with three points and strike with dip will be calcu-lated for the plane containing those three points.

Possible uses:

• Vulcan in the rotated view, click on the empty screen (not on the data) and the strike/dip of the view will be shown.

• Enter Snap to object mode and click three times on any triangulation. The strike/dip of the plane made from those three points will be reported.

List Gathers detailed information on the object, including layer and object name, feature, value, and colour. The coordinates of all the

object points (in the order in which they have been digitised) are reported in the Report window.

List objects Provides a list of all objects selected either by name, layer, feature or group, or combination of those. Useful tool to see a list of

objects for example, in layers.

Find objects Highlights objects on-screen (or sends a report to the Microsoft®

Excel spreadsheet) based on the specified condition. For example, if one object is named ‘LINE_TEST’ then the condition LIKE

‘LINE_TEST’ will highlight this specific object. Search objects using attributes, such as layer name, description, value,

coordi-nate, linestyle, number of points, and point types.

Layer range Provides information on minimum and maximum X, Y and Z per layer or per object.

Angle/Distance Reports the length and angle of the shortest line, which can be used to connect two objects (their selected segments). If the objects are not in the same plane, this option can also be used.

The box for Projecting onto a 3D plane must be active.

Tutorial 8.2

1. Find the dip of the warehouse roof.

2. Then find the number of points in the boundary polygon.