I have a Scale Question

spence · 5 Sept 2008, 15:00

First, this is not a Sketchup scale question but I have to ask Sketchup people because they are the best and nicest.
I have printed out a google earth image to the scale of 1:300 and for some crazy reason I drew a plan over that image at 1:500 scale. Now I need to find out what percentile I copy my 1:500 drawing to be at 1:300?

remus · 5 Sept 2008, 15:05

166%, although you might want to get someone else to check that.

remus · 5 Sept 2008, 15:07

Daniel, i think you got the division the wrong way round. If its 1:500 the scale is to small, your going to make it smaller again by multiplying by 0.6

Daniel · 5 Sept 2008, 15:07

Simply divide 300 by 500, for an enlargement factor of 0.6

Remus, that would work if you wanted to enlarge 300 to 500 (500 divided by 300 = 1.6666e)

Alan Fraser · 5 Sept 2008, 15:10

That would be right. You can actually type the new scale 5/3...or maybe not. Stick with 1.66. I could have sworn I've scaled fractionally before today.

Daniel · 5 Sept 2008, 15:12

You might be correct, Remus. We (at our office) don't draw anything "to scale" and don't even understand how one would do that - everything we do is full size.

Alan Fraser · 5 Sept 2008, 15:16

Actually, that scaling function is rather buggy. 1.66 is close but is not absolutely precise. It seems weird that you can enter fractional inches in the VCB, but when you try to scale a cube to 5/3 or 1 2/3 it jumps considerably smaller. SU seems to take any fractional value as a measurement...even if you think you are entering a ratio.

spence · 5 Sept 2008, 15:55

I tried setting the copier to 166% and that worked out right. I can now place a scale on it and it works.

I'm always confused by scale when drawing stuff by hand and then sizing it digitally. Although this was not being sized digitally it was being sized on a copy machine.

Thanks for the help

Wo3Dan · 5 Sept 2008, 16:03

@spence said:

First, this is not a Sketchup scale question but I have to ask Sketchup people because they are the best and nicest.
I have printed out a google earth image to the scale of 1:300 and for some crazy reason I drew a plan over that image at 1:500 scale. Now I need to find out what percentile I copy my 1:500 drawing to be at 1:300?

Spence,

Since this is not a Sketchup issue you need to scale up your drawing 1.66667:1 which means enlarge it.
Only then it will match the GE image that is 1:300 (Remus is right)

In SU you could either use the scale tool or the tape measure tool to correct things.
With the scale tool you can (at least I can) add decimal comma in a factor or add a unit.
The unit means: skip factor but aply measure, grip to grip. Tricky but it works to correct things.

Wo3Dan

spence · 5 Sept 2008, 16:28

Thats good information Wo3Dan. Now how did you get the 1.66667 number?

Wo3Dan · 5 Sept 2008, 17:05

@spence said:

Thats good information Wo3Dan. Now how did you get the 1.66667 number?

Spence,

You are pulling my legg aren't you?

Anyway. Your input (in the copier) is 1:500. The output needs to be 1:300 which is a larger scale.
So you need ?:500 to equal 1:300. What more can I say? (500/300):500 = (1.66666667):500 = 1:300

b.t.w. don't underestimate the SU scale tool features whenever you encounter such a thing in SU.

success,
Wo3Dan