Print at Feb 4, 2026, 12:12:01 PM
Posted by sorrow at Aug 6, 2017, 7:43:24 AM
How to know what measurements to set on imported floorplan with no scale present
Hi all,

I am importing a floorplan with no scales present so that I can draw it out on Sweethome 3D, just to check how should i go about setting the dimensions as the system prompts me to insert a measurement before i can click continue.

Many thanks in advance.

Posted by hansmex at Aug 6, 2017, 8:40:12 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Make a guess...

Sometimes beds are drawn in bedrooms, take those as a guideline and set them as 200 or 210 cm in length.
Kitchen sinks are usually around 60 cms deep, you could take those.
It's not perfect, but better than nothing.
Use the zoom function to enlarge your background image.

H
----------------------------------------
Hans

new website - under constuction
hansdirkse.info

Posted by sorrow at Aug 6, 2017, 8:47:05 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Make a guess...

Sometimes beds are drawn in bedrooms, take those as a guideline and set them as 200 or 210 cm in length.
Kitchen sinks are usually around 60 cms deep, you could take those.
It's not perfect, but better than nothing.
Use the zoom function to enlarge your background image.

H


Hi Hansmex, thanks for your advice, so meaning i have to make a wild guess as nothing that allows an auto gauge even if i have the total area in sqft. crying crying crying

Posted by hansmex at Aug 6, 2017, 9:36:22 AM
Re: How to know what measurements to set on imported floorplan with no scale present
If you have the total area, you can make a first guess. Make a room that equals your total area, and compare the room size with the given surface. Adjust scale according to need.

H
----------------------------------------
Hans

new website - under constuction
hansdirkse.info

Posted by okh at Aug 6, 2017, 10:00:59 AM
Re: How to know what measurements to set on imported floorplan with no scale present
..take those as a guideline and set them as 200 or 210 cm in length...
Or sometimes 190cm outside Holland/Scandinavia smile
Hansmex' advice is good as there is usually some identifiable length somewhere in the drawing (pick the longest). Even a door/window could give an approximate result as long as the proportions are correct.
..a wild guess as nothing that allows an auto gauge even if i have the total area in sqft...
Actually, if you have the area, you might be able to make an estimation of the length of one wall. After you have the approximation (I would not call it a wild guess). You can go back and adjust. Create a room in the drawing and see how well it matches the area you have. Then you can change the measurements in the background drawing. When you start drawing a couple of walls, often the lengths will become apparent as there are often some standard measurements in a plan.

ok

Posted by sorrow at Aug 6, 2017, 2:04:36 PM
Re: How to know what measurements to set on imported floorplan with no scale present
..take those as a guideline and set them as 200 or 210 cm in length...
Or sometimes 190cm outside Holland/Scandinavia smile
Hansmex' advice is good as there is usually some identifiable length somewhere in the drawing (pick the longest). Even a door/window could give an approximate result as long as the proportions are correct.
..a wild guess as nothing that allows an auto gauge even if i have the total area in sqft...
Actually, if you have the area, you might be able to make an estimation of the length of one wall. After you have the approximation (I would not call it a wild guess). You can go back and adjust. Create a room in the drawing and see how well it matches the area you have. Then you can change the measurements in the background drawing. When you start drawing a couple of walls, often the lengths will become apparent as there are often some standard measurements in a plan.

ok
Hi Hansmex, Okh, noted and thank you, I'm still abit new to these, let me see how I can upload the drawing on google drive or dropbox and see if anyone can guide a stupid me from there crying

Posted by okh at Aug 6, 2017, 4:01:09 PM
Re: How to know what measurements to set on imported floorplan with no scale present
..let me see how I can upload the drawing on google drive or dropbox and see if anyone can guide a stupid me from there...
I once asked a local fisherman that I could not understand how he could navigate his boat through an archipelago avoiding every numerous, unmarked, underwater rock. His answer was: "How do you think I found them?" Your question is not stupid, I only reply because I have wasted some time trying to figure it out smile

Posted by sorrow at Aug 7, 2017, 2:06:29 AM
Re: How to know what measurements to set on imported floorplan with no scale present
..let me see how I can upload the drawing on google drive or dropbox and see if anyone can guide a stupid me from there...
I once asked a local fisherman that I could not understand how he could navigate his boat through an archipelago avoiding every numerous, unmarked, underwater rock. His answer was: "How do you think I found them?" Your question is not stupid, I only reply because I have wasted some time trying to figure it out smile


Thank you Okh, hope I didn't say anything wrong biggrin
anyways as mentioned, I included a floorplan i wanted to draw in general, its a 1,066 sqft 3 bedders unit. Was wondering if someone could point me in the right direction with a visual image as I understand you and Hansmex was telling me some dimensions, so maybe a visual would be better to explain. Thank you all once again. applause



https://www.dropbox.com/s/cufix2uuvfyeicc/Brooks%201066sqft.jpg?dl=0

Posted by bdfd at Aug 7, 2017, 7:16:56 AM
Re: How to know what measurements to set on imported floorplan with no scale present
... anyways as mentioned, I included a floorplan i wanted to draw in general, its a 1,066 sqft 3 bedders unit. Was wondering if someone could point me in the right direction with a visual image as I understand you and Hansmex was telling me some dimensions, so maybe a visual would be better to explain...

https://www.dropbox.com/s/cufix2uuvfyeicc/Brooks%201066sqft.jpg?dl=0
Hi,

For me there is one unuseless bath : this bath3 far in the rear of the kitchen.
If it possible for you, Near BR3, you delete it and you can grow up the BR3...

smile
----------------------------------------
Evil progresses when good people do nothing!
---
SH3D 7.1 and nothing else - W11 64b in 4K

Posted by hansmex at Aug 7, 2017, 8:56:33 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Try this file , took me al of 10 minutes.
----------------------------------------
Hans

new website - under constuction
hansdirkse.info

Posted by okh at Aug 7, 2017, 1:22:50 PM
Re: How to know what measurements to set on imported floorplan with no scale present
Ah yes, not too much to go on in you drawing. Here is what you could do to estimate a long line in the drawing so it scales correctly in SH3D.
- Assume a rectangle top wall and right wall (incl lift shaft), shape is not the same, but area looks roughtly like the size of the flat.
- Imaginary overlay rectangle is 238×390 pixels, a ratio of 0,61:1.
- So the right wall from top of lift shaft to corner is roughly the square root of area/0,61 = 41.8 ft.
- In SH3D, import drawing and set the measurement along the right wall (including lift shaft) to 41.8 ft (≈ 41'10").
- Draw a room inside the flat and see what SH3D reports the area to be (advanced editing plugin is useful to scale room sketch).
- If area is too small, increase the length in the background image (or vice versa).
- Measure different distances in the flat and see if they make sense, and adjust again if necessary. As hansmex said, look for standard measures such as door width, kitchen top width, tub width etc.
- Once you have the background plan (fairly) correct, delete all the test sketches an start drawing.

Sent you a quick test by mail not really knowing the floor area calculation (different in different countries), but I assumed the green area was supposed to be 1066 sqft. Result (or original) not sufficiently accurate for millimetre construction or official purposes. But test indicates that the guesstimate is reasonably close, probably as close as possible given the original.

Good luck.

ok

PS. Just noticed that hansmex has posted a very similar file. My assumption was that all of the green area was 1066 sqft (see above), but I may be wrong.

Posted by Ceciliabr at Aug 8, 2017, 12:31:08 AM
Re: How to know what measurements to set on imported floorplan with no scale present
@sorrow

... I have to make a wild guess as nothing that allows an auto gauge even if i have the total area in sqft


No, you don't have to guess. You just make a room with an outline that mimics the precise outline of the total area of your floor plan, and then SH3D will give you the areal of this outline. Then you can see what percentage you have to increase or decrease your outline with in order to match the areal on your floor plan. This should give you the correct size.

Or did I miss something...?


cec

Posted by bdfd at Aug 8, 2017, 6:37:57 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Did you see the Hans's work (on first page) ?

No, because Hans has solved the problem very well by giving his file !

smile
----------------------------------------
Evil progresses when good people do nothing!
---
SH3D 7.1 and nothing else - W11 64b in 4K

Posted by okh at Aug 8, 2017, 8:51:38 AM
Re: How to know what measurements to set on imported floorplan with no scale present
..a room with an outline that mimics the precise outline...
Or did I miss something...?
No, you did not miss anything at all. Seems we are all saying pretty much the same thing. The shape of the area to be measured made it interesting, though (assuming green area): whether there is a relatively simple way of achieving a fairly high level of accuracy from a low quality drawing of an odd shape.

Is this practical? Well, not usually, but it can be. One frustration is the numerous standards for how a building should be measured and how area should (must) be measured and indicated: Gross External Area (GEA), Gross Internal Area (GIA), Net Internal Area (NIA), Primary Area, External Area (SEM), Internal Area (SIM), Constructed Area (SDC) and so on. And it does not make it easier that all sorts of institutions have different practices: UK Royal Institution of Chartered Surveyors, DIN norm 277 (Deutsches Institut für Normung: Grundflächen und Rauminhalte von Bauwerken im Hochbau), 2012 European Real Estate Area Label, to mention but a few.

The European label, if I remember correctly, requires accuracy < 1cm, and I was curious about how long it would take to get a fair precision. It took longer than hansmex 10 minutes (for me to get what I wanted), but task was not daunting. Hence the exercise above: a fair approximation, but < 1cm? I really do not know and will probably never find out. But bottom line is, I think we are all saying the same thing. I just waste more words smile

ok



Posted by Ceciliabr at Aug 8, 2017, 5:41:46 PM
smile   Re: How to know what measurements to set on imported floorplan with no scale present
Hi there, bdfd.

Did you see the Hans's work (on first page) ? No, because Hans has solved the problem very well by giving his file !


Has he? Well, that's splendid!

Have a drink at the bar, I can suggest a "negroni",
and I can suggest this informative article:

https://saterdesign.com/blogs/news/117367303-total-area-vs-living-area


cec

Posted by Ceciliabr at Aug 8, 2017, 6:23:25 PM
Re: How to know what measurements to set on imported floorplan with no scale present
@okh

Seems we are all saying pretty much the same thing.


Yes, but there seems to be some uncertainty as to the interpretation of the term "total area".
Total area equals the size of the plan measured on the outside walls.

Of course, if the linked illustration is showing the plan in it's full size, outlining the "footprint" will probably not give us the exact size down to the millimetre, and there would be an equal amount of uncertainty regarding the dimensions and placements of the inner walls.



cec

Posted by okh at Aug 8, 2017, 8:12:55 PM
Re: How to know what measurements to set on imported floorplan with no scale present
@cec
Has he? Well, that's splendid!
smile
..uncertainty as to the interpretation of the term "total area"...
Of course there is, this is legislation. You would not want to leave lawyers unemployed, would you?
..the "footprint" will probably not give us the exact size down to the millimetre...
Nope. Actually it will certainly not give us the exact millimetre size. Purely a theoretical exercise. That said - measuring stuff in the flat suggests the estimate is not half bad. Possibly as close as it can get, given the original.

Mind if I pass on the negroni? Please order me a double Laphroaig, no ice (and most certainly no umbrellas), if you see the barman.

@sorrow - there you go - that is what happens when asking questions in a bar... (right place, but the exchange may get sort of silly eventually). Hope the banter can be of some use... Good luck.

Posted by Ceciliabr at Aug 8, 2017, 9:31:25 PM
Re: How to know what measurements to set on imported floorplan with no scale present
@okh

I was merely trying to point out that once you have a shape and you know the areal of that shape – and on top of that have a program like SH3D, which even saves you the trouble of calculating the areal of your copy – you really don't have to calculate anything but the percentage to get it right. You can even use a free percentage calculator found on the net.
But, of course, my assumption was that mr/ms sorrow was holding a plan of more common size, a sharper and more detailed plan than the miniature image that was linked.


Please order me a double Laphroaig, no ice


Agree... but the suggestion was not for you... smile
One Laphroaig coming up, ( double is still not allowed in Norway, is it?) and might I join you with my Japanese Nikka Coffey Grain?

cec

Posted by sorrow at Aug 9, 2017, 3:06:49 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Try this file , took me al of 10 minutes.


Hi Hansmex,

sorry for the late reply as was down with fever + work these two days, let me look thru and update later as its National Day here today though i'm still working thanks. love struck

Posted by sorrow at Aug 9, 2017, 3:07:46 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Ah yes, not too much to go on in you drawing. Here is what you could do to estimate a long line in the drawing so it scales correctly in SH3D.
- Assume a rectangle top wall and right wall (incl lift shaft), shape is not the same, but area looks roughtly like the size of the flat.
- Imaginary overlay rectangle is 238×390 pixels, a ratio of 0,61:1.
- So the right wall from top of lift shaft to corner is roughly the square root of area/0,61 = 41.8 ft.
- In SH3D, import drawing and set the measurement along the right wall (including lift shaft) to 41.8 ft (≈ 41'10").
- Draw a room inside the flat and see what SH3D reports the area to be (advanced editing plugin is useful to scale room sketch).
- If area is too small, increase the length in the background image (or vice versa).
- Measure different distances in the flat and see if they make sense, and adjust again if necessary. As hansmex said, look for standard measures such as door width, kitchen top width, tub width etc.
- Once you have the background plan (fairly) correct, delete all the test sketches an start drawing.

Sent you a quick test by mail not really knowing the floor area calculation (different in different countries), but I assumed the green area was supposed to be 1066 sqft. Result (or original) not sufficiently accurate for millimetre construction or official purposes. But test indicates that the guesstimate is reasonably close, probably as close as possible given the original.

Good luck.

ok

PS. Just noticed that hansmex has posted a very similar file. My assumption was that all of the green area was 1066 sqft (see above), but I may be wrong.


Hi Okh, noted and thanks, let me look thru it later. ;) sorry was abit delayed in replying, i'm still here though abit weak haha

Posted by sorrow at Aug 9, 2017, 3:09:37 AM
Re: How to know what measurements to set on imported floorplan with no scale present
@sorrow

... I have to make a wild guess as nothing that allows an auto gauge even if i have the total area in sqft


No, you don't have to guess. You just make a room with an outline that mimics the precise outline of the total area of your floor plan, and then SH3D will give you the areal of this outline. Then you can see what percentage you have to increase or decrease your outline with in order to match the areal on your floor plan. This should give you the correct size.

Or did I miss something...?


cec


Hi Ceciliabr, haha let me try first as i just started using this software, abit of virgin on this haha. like i mentioned in my earlier posts, please do pardon me if i asks 'strange' questions biggrin or if i dun understand your question. let me have a look later when i'm back from work tongue

Posted by sorrow at Aug 9, 2017, 3:11:29 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Did you see the Hans's work (on first page) ?

No, because Hans has solved the problem very well by giving his file !

smile



Hi Bdfd, yeah going to look thru and open another can of worms haha. oops but seriously i will look thru and try and put any questions up. I would like to thank every person who has posted here to an absolute nearby without bashing me.

Please accept my heartfelt thanks from the bottom of my heart.

rose rose rose rose

Posted by sorrow at Aug 9, 2017, 3:12:27 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Haha understood Okh, thanks everyone once again, I will try it later ;)

Posted by sorrow at Aug 9, 2017, 11:38:19 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Hi Hansmex, I saw your drawing, just to check how did you come to the input measurement 1076.5cm on the background image?

Posted by okh at Aug 9, 2017, 12:59:41 PM
Re: How to know what measurements to set on imported floorplan with no scale present
... even saves you the trouble of calculating the areal of your copy – you really don't have to calculate anything but the percentage to get it right. You can even use a free percentage calculator found on the net.
True, and it proves your point. It is possible to insert the drawing approximately and scale it to size later. But of course, you miss out on the geometry fun.
Agree... but the suggestion was not for you... smile
One Laphroaig coming up, ( double is still not allowed in Norway, is it?) and might I join you with my Japanese Nikka Coffey Grain?
Puh, was worried there for a while. You are probably right, I think double-measure drinks may not be allowed in bars. Forgot that. But then, I have not been in a Norwegian bar for ages. I will make a note of trying the Japanese stuff.
Yes, but there seems to be some uncertainty as to the interpretation of the term "total area".
Total area equals the size of the plan measured on the outside walls.
That is how I understand it too: total area is generally area within the outside wall faces (@sorrow, you may note the special paragraph on Singapore in the Wikipedia link).

The fun starts is when other terms are used, e.g. net or extended values such as usable areas for tax purposes, purposes of sale, property value assessment, floor area ratio (to land area for building regulation/zoning purposes) and so on. And I am not sure that the article cec linked about total vs living area will apply everywhere. Just take some European examples:
FR: Surface hors œuvre brute
, SV: Boyta, NO: Arealberegning av bygninger, DE: Grundfläche, NL: Vloeroppervlak, EU guide for Commission properties. Lots of similarities, but in practice there can reportedly be as much as 30% difference in area calculation within the EU/EEA in different contexts (Commission, I think, is working on harmonisation).

All building regulation can be confusing. And the finer details of area calculation may not be on top of the list of things to think of for normal SH3D use. However, when buying/selling, dealing with building permits and so on, measuring area should be left to professionals. To give one example: a widow sold a little house. After the sale it turned out that parts of the basement - a den and a bathroom - marginally did not satisfy minimum requirements for occupancy and should not have been included in the area in the contract. The widow ended up having to pay back a significant sum. The new owners, of course, kept using the den and the bathroom ignoring the legal requirements. And the building regulation was later changed, so the new owners can now include the basement area if they sell.

ok

PS cec - The country banning double-measure drinks also appears to have complicated rules for area measurements... In fact, I could not even find a Danish Wikipedia article on the topic.

Posted by Ceciliabr at Aug 9, 2017, 10:53:13 PM
Re: How to know what measurements to set on imported floorplan with no scale present
@okh

But of course, you miss out on the geometry fun.


True... and thank you for pinpointing this essential drawback wink

But still; if we choose to measure a sink or a bed or anything else we think we know the size of;
in the end, to be certain that our total area equals that of the plan, we will have to make an outline
anyway, to check if we have got the total area correct.
So... well...


PS cec - The country banning double-measure drinks also appears to have complicated rules for area measurements... In fact, I could not even find a Danish Wikipedia article on the topic.


The Danish word is "bruttoetageareal". The rules for calculating the bruttoetageareal are very specific.
I found this page, although not on Wikipedia ( eller "Hakkespettboken" som vi kaller den i vår familie).

https://www.bolius.dk/bruttoetageareal-18311/

Enjoy!

cec

Posted by sorrow at Aug 10, 2017, 3:24:01 AM
Re: How to know what measurements to set on imported floorplan with no scale present
Can I assume Hansmex cm is large because he catered for the odd shape, so I should put maybe plus minus 10cm from my future drawings as my drawings is not drawn to scale, just want people to have a feel of the unit in 3D format.

I'm abit lost at what Okh had said on the imagination part, i'm pretty bad with imagining things lol

Posted by okh at Aug 10, 2017, 9:20:45 AM
Re: How to know what measurements to set on imported floorplan with no scale present
@sorrow Never mind the imaginary pink overlay and guesstimate, that was just an answer to your initial question, estimation of distance based on area. How to insert an image quickly, without having to draw the outline, approximately the right size (as it happens, it was pretty much spot on, but that includes some luck).

What counts is what I believe we all say: Use a correctly shaped room the right size and adjust the background image accordingly. As cec kindly points out: "...we will have to make an outline anyway, to check if we have got the total area correct". She is of course, absolutely right in pointing out that my first area to distance exercise has very limited value (except for the geometry fun, of course).

Peeked at hansmex' and my drawings. hansmex has drawn the room roughly equal to how gross area often is measured in Europe. And close to what I would have done if it were not for the green area in your drawing. I took the green area as a hint of the 1066sqft and outlined the room shape along the green (forget pink rectangle) . So if you want the green area to be 1066sqft, use mine. If you want hansmex' outline to equal 1066ft, use his. We did the same thing, just using slightly different assumptions of what should be measured.

Which is more correct is impossible to say without knowing exactly what is to be included in the 1066sqft (and having some more information). Still, the scale difference between the two files is only some 2%. That may not matter much unless you are using the plan for construction. And neither drawing claims 100% accuracy anyway.

@cec Thanks, it is a certainly a relief to know that Danes at least have some rules! Double measured drinks allowed! Next thing you will tell me is that Danes can buy wine in normal stores! Pretty close to anarchy if you ask me. No wonder you are coming North for your holidays...

Wikipedia - Hakkespettboken smile - se, nå kommer også det til å sitte fast i minnet. Som da Facebook skulle hete fjesbok, men fjøsbok ble sittende i mitt bakhode.

ok

Posted by sorrow at Aug 11, 2017, 2:42:44 AM
Re: How to know what measurements to set on imported floorplan with no scale present
@sorrow Never mind the imaginary pink overlay and guesstimate, that was just an answer to your initial question, estimation of distance based on area. How to insert an image quickly, without having to draw the outline, approximately the right size (as it happens, it was pretty much spot on, but that includes some luck).

What counts is what I believe we all say: Use a correctly shaped room the right size and adjust the background image accordingly. As cec kindly points out: "...we will have to make an outline anyway, to check if we have got the total area correct". She is of course, absolutely right in pointing out that my first area to distance exercise has very limited value (except for the geometry fun, of course).

Peeked at hansmex' and my drawings. hansmex has drawn the room roughly equal to how gross area often is measured in Europe. And close to what I would have done if it were not for the green area in your drawing. I took the green area as a hint of the 1066sqft and outlined the room shape along the green (forget pink rectangle) . So if you want the green area to be 1066sqft, use mine. If you want hansmex' outline to equal 1066ft, use his. We did the same thing, just using slightly different assumptions of what should be measured.

Which is more correct is impossible to say without knowing exactly what is to be included in the 1066sqft (and having some more information). Still, the scale difference between the two files is only some 2%. That may not matter much unless you are using the plan for construction. And neither drawing claims 100% accuracy anyway.

@cec Thanks, it is a certainly a relief to know that Danes at least have some rules! Double measured drinks allowed! Next thing you will tell me is that Danes can buy wine in normal stores! Pretty close to anarchy if you ask me. No wonder you are coming North for your holidays...

Wikipedia - Hakkespettboken smile - se, nå kommer også det til å sitte fast i minnet. Som da Facebook skulle hete fjesbok, men fjøsbok ble sittende i mitt bakhode.

ok


Hi Okh, got it, let me try to draw on my own and update here. Thanks once again. ;)