# Thread: Making leaf-like city layout plan

1. ## Making leaf-like city layout plan

Registered forum members do not see this ad.

Hi everyone !
I am designing a city with leaf-like layout. I've across a problem in the very beginning which is that i can't seem to understand the geometry involved in here. Let's i want to make a leaf shaped town such that it can have any desired area e.g. 800 acre with the same dimension like the leaf that added below. While experimenting with arc tool I've so far been able to do it but i would like to know the exact ways to do it. (pardon my English)

2. Have you tried to insert the leaf picture into a drawing, and then trace over it?

3. You will need more than one arc on each side or perhaps an arc and ellipse or a spline to reproduce the curve.

4. Leaf_1.JPG
The rough outline of the leaf can be generated by tracing over an edge using a polyline then miroring that polyline to the other side. The leaf is rather small though. You would have to scale it up considerably to approximate an area of 800 acres.

5. If you keep it fairly simple, as in your OP, then the formula for the area of a segment is all you need (and double it for the two segments). Consider the formulae and approach offered in this link: http://www.regentsprep.org/Regents/m...cleSectors.htm. If you want to duplicate the actual shape of the leaf, then that will be a bit more complicated. It is quite easy to get the area of a polyline. You did not indicate how experienced you are with AutoCAD. If you are designing a city, I would hope you are very experienced. Or is this perhaps a school project?

6. 1.25 square miles = 800 acres. You town won't be very big.

7. Leaf_2.JPG
This leaf like shape was created using four arcs that were then joined via the PEDIT command and mirrored.

8. Mir Ali: So, have you made any progress?

9. Originally Posted by ReMark
Mir Ali: So, have you made any progress?
so kind of you. Pardon me i may sound like real nuisance to you as i am really inexperienced with drafting . I've traced the picture and it gives me a nice layout. There are a few more things that i would like to know:

1. Lets the traced figure has an area of 2000 sq.ft. How do i scale it get any desired area? I can do the units conversions

2. How do i create the shape with arc tool by making four arcs?

3. I am working in model space, hopefully i am going to print it on some scale. Do i have to work in viewports or should i carry on the work in model space and get it plotted. This is my first project that i am going to get plotted so i am unfamiliar with the paper sizes that i may get hands on.

It's my university project and yeah the town size is quite small. But given the time and scope of the course i may design the project in around 800 acre to 1500 acre.

10. Registered forum members do not see this ad.

Originally Posted by eldon
Have you tried to insert the leaf picture into a drawing, and then trace over it?
I guess that is what i have to go with.

Originally Posted by neophoible
If you keep it fairly simple, as in your OP, then the formula for the area of a segment is all you need (and double it for the two segments). Consider the formulae and approach offered in this link: http://www.regentsprep.org/Regents/m...cleSectors.htm. If you want to duplicate the actual shape of the leaf, then that will be a bit more complicated. It is quite easy to get the area of a polyline. You did not indicate how experienced you are with AutoCAD. If you are designing a city, I would hope you are very experienced. Or is this perhaps a school project?
Thanks but i am going to getting in technicalities though thank you. I have very little experience with AutoCAD probably used it a couple of times. I am studying city and regional planning and the course in which i've been given this practical is "Planning of new town"

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts