scale issue

[MrMaggs]

I have just been sent a plan detailing substation locations.
On the drawing there are Easting & Nothings are per national grid reference.
When I draw the substations on my dwg according to the E's & N's its 1000 times too small.
All my viewports are set up by 'zoom' and then 1/ ''scale'' XP - they all come out at the correct scale.

If I insert a raster image, I scale it up by the amount shown on the paper copy - eg 1/500 and it comes out to scale.
Any ideas where im going wrong? my boss-:twisted: , has mentioned that the plans are way to big for his G.I.S. program and he scales them down.

Our units are set as MM, any ideas what's going on? :?

If you need more info please let me know, this was done quick

[SLW210]

It sounds like it is not a 1:1 scale in Model Space.

Scale it to 1:1 in model space.

[MrMaggs]

and how would i set my view to 1:500 then in my viewport?

[eldon]

National Grid references are usually given in metre units, so if you are working in millimetres, there is a 1000 scaling to be applied from one system to the other :)

I have seen the grid references given in millimetres, but there are too many figures for me :(

[CADken]

if it's 1000 times too small, can't you "scale" everything by 1000 times?

sorry if that sounds like i'm being a smart-arse, but i'd scale everything up...

and if you select the viewport you can enter a custom scale if needed.... in the properties window.

[MrMaggs]

Thank you, i knew there was something i was overlooking.
What units do you guys use then?

[MrMaggs]

CADken, thats what i was doing - just thought there was another way to go about it. Not sure if the drawing was in the correct place. Will see how it goes when they send through a CAD drawing!
Do you scale your viewports using the Z 1/***xp command?

[eldon]

What units do you guys use then?

I prefer to use metres, but if you do any scaling, use the 0,0 as your base point, so that the coordinates keep the proper figures even though one is 1000 times the other :)