topic Re: Calculating area of irregular shape drawn by dashed lines in AutoCAD Forum

Calculating area of irregular shape drawn by dashed lines

Anonymous — Wed, 22 Jan 2020 06:57:31 GMT

I have a drawing for an irregular shapes drawn by dash lines which i could not transform into poly line to calculate area. please support.

Re: Calculating area of irregular shape drawn by dashed lines

ennujozlagam — Wed, 22 Jan 2020 07:08:50 GMT

have you try to command: list > then pick the line that will give you an area and length or share you file so we can check. thanks

Re: Calculating area of irregular shape drawn by dashed lines

Alfred.NESWADBA — Wed, 22 Jan 2020 07:28:22 GMT

Hi,

>> which i could not transform into poly line to calculate area

Draw a line (with object snap) to connect the upper two endpoints, same for the lower endpoints.

Then draw a hatch inside the area ... selecting the hatch shows you the area in the property window.

>> by dash lines

I hope you mean "lines with linetype dashed" and not that this is a sum of separate lines with spaces.

If the expected or necessary accuracy you need is not too high:

Start command _PEDIT with option _MULTIPLE, then select these small lines, now option _JOIN and for the fuzzy tolerance use a value a bit higher than the space between these small lines.

This will create a polyline for each of the sides, giving you more options to connect the right and left side, make a closed polygon from that and get the area as result.

Next time please upload the dwg-file so we really know what you have, so no need to guess for us!

- alfred -

Re: Calculating area of irregular shape drawn by dashed lines

imadHabash — Wed, 22 Jan 2020 08:39:04 GMT

if do you want to calculate an area in AutoCAD ... you have to close your shape NOT as you have now a parallel lines with opening ends .

Re: Calculating area of irregular shape drawn by dashed lines

Anonymous — Wed, 22 Jan 2020 09:35:39 GMT

even after closing the shape, the dashed line prevent the shape from being closed.

the dashed line is not consisting of one continuous line, but it is many small lines after each other

Re: Calculating area of irregular shape drawn by dashed lines

imadHabash — Wed, 22 Jan 2020 09:37:28 GMT

would you please attache here your CAD drawing file for testing ?

Re: Calculating area of irregular shape drawn by dashed lines

Anonymous — Wed, 22 Jan 2020 09:44:02 GMT

Attached, Thanks

Re: Calculating area of irregular shape drawn by dashed lines

imadHabash — Wed, 22 Jan 2020 10:02:29 GMT

your shape consist from many attached polylines ( 147 + hatch ). the spaces between those polylines are NOT the same as a dashed line . you have to trace over those elements to get a real lines or polylines .

Re: Calculating area of irregular shape drawn by dashed lines

Alfred.NESWADBA — Wed, 22 Jan 2020 09:56:43 GMT

Hi,

>> the dashed line prevent the shape from being closed

Have you seen my description in post 3 here using _PEDIT and _JOIN?

This shows how to create one polyline from your mass of small lines.

- alfred -

Re: Calculating area of irregular shape drawn by dashed lines

Anonymous — Wed, 22 Jan 2020 10:26:08 GMT

I saw it and tried it with thanks and appreciation, but it did not work due to the same reason mentioned in the above comment of imadHabash.

Re: Calculating area of irregular shape drawn by dashed lines

Alfred.NESWADBA — Wed, 22 Jan 2020 12:23:53 GMT

Hi,

>> but it did not work due to the same reason mentioned

>> in the above comment of imadHabash

it only does not work because these small elements are already closed.

Therefor select all these small polylines, in the property window change option "closed" to "false"

Then run command _PEDIT ==> _MULTIPLE ==> _JOIN ==> 1.80

...all well then on my system

- alfred -

Re: Calculating area of irregular shape drawn by dashed lines

Anonymous — Wed, 22 Jan 2020 12:52:59 GMT

actually it worked according to your advise and support. You are my hero.