Querying Areas and Angles

The Measure options from the DTM Query Menu allow you to query areas and angles using the points.  The same restriction applies to where to search for the required points as that for distances in that you cannot change where to search points for in the middle of the option.

Measuring an Area

The Measure Area option allows you to calculate the area of the polygon created using a series of points as apexes.  You will be asked to indicate the points in sequence and once completed, the dialog shown below will be displayed. Note that you do not need to close the sketched polygon back to the first points since n4ce will do this for you. The list control displays the vertex count and the indicated point codes, numbers and co-ordinates. To the bottom of the dialog are the plan area of the polygon together with the plan circumference, with the closing leg being automatically added.

The Report button allows you to generate a report of the information in the dialog box in a report view.

Measuring an Angle

The Measure Angle option allows you to calculate the angles between two lines meeting at a common point.  You will be asked to indicate a baseline of two points and then a series of third points for which the angle is to be determined.

For each indicated third point, n4ce will calculate and display the bearing of the base line together with the two angles from point 2, to point1 to point3, as shown in the dialog below.

The Report button allows you to generate a report of the information in the dialog in a report view.

Splitting the Area of a Feature

The Measure Area Split option allows you to split the area of a feature into two using a user-defined bearing.  It is only available in the Professional and Designer editions of n4ce.  You will be asked to indicate the feature to split and then enter the bearing at which the line dividing the feature into two should be created. The units of the bearing should be those as set by the current display options.

You will then be asked to indicate the position of the dividing line.  As you move the line over the feature, the status window to the bottom right will update showing the areas inside the feature to the left and to the right of the line.

Once you are happy, pressing the left button on the mouse will generate the dividing line and the values of the areas inside the feature to the left and right.  You will be given the option to choose the layer, colour, line style and text style for the generated CAD elements.  After the first CAD elements have been placed, you are asked to indicate another dividing line should you wish.

This option follows the current lock mode so you can instruct it to lock to points or anything in the current backcloth.