8.2.5 Arcs - LUPMISManual

8.2.5 Arcs

Level of expertise required for this Chapter: Intermediate; specifically for LUPMIS @ TCPD

• a) Continue to Arc
  

This tool is similar to the 'Continue line' under ' Lines'. You define an arc (or circle) in continuation of an existing line by entering the size of the arc (radius) and for how many degrees the arc should run (e.g. 90 deg for a quarter circle, 180 deg for half a circle).

You can define an 'offset', if you want to start the 'continuation line' before the endpoint of the original line (circle 2 below).

• b) Curved splay
  

This tool helps you to create a curve around a corner. You only define 3 points: Number 1 at the corner, 2 and 3 indicating the directions (either roads or sides of a parcel), and you define the distance of the 'curved splay' from the corner ('offset').

After you have defined the 'curved splay line', if you want to cut a parcel, have the layer with the parcel in the live layer (not this splay line!) and Select the parcel to be cut > Edit > Show Selection Manager > Selection Manager window: Actions > Basic operations > Cut with file > Cutter file > Select this splay line file > OK.

There is a similar function, which produces a straight spray line under 'Lines'.

• c) Curved Line
  

If you have points and want to have a smooth line around the points, use this function. Enter the points or the DRA file (either as point file or line file).

• d) Arc from Center
  

This tool lets you define an arc (or circle) from 2 points: Number 1 is the centre of the arc, number 2 the start point. You only enter the direction (clockwise or anticlockwise) and for how many degrees the arc should run (e.g. 90 deg for a quarter circle).

e) 

• e) Arc from 3 Points
  

If you have 3 points and want to have an arc connecting these 3 points, use this tool. You dont have to specify the 'direction' of the arc; it always places the second point between the first and the third.

• f) Junction Arc
  

On a junction, where you have a corner point and direction of 2 lines, you can create a 'junction arc' to make a smooth transition from one line to another.

If you know the junction point, you select the '3-point' approach:

If you don't know the junction point, but have the direction of the 2 lines, you select the '4-point' approach by select any 2 points on each line: