AutoCAD 2012

[#1]

Hoping someone can advise.

I work in an engineering company.

I sometimes am given drawings which are done in a software package called LSS of which I do not know much, these drawings are  usually to show a model of a bund, by using contours of a site on which I am working and are saved by LSS in a dxf format so I can then import them into my autocad drawing.

The problem I have is that I also have drawings of the same site from a surveyor which has the buildings new and existing, but they are in different units.

The surveyors drawing for instance the grid measures 100000mm whereas the LSS model drawings the grid is 100m.

This means the coordinates are different so it is dificult to match them up , the only way is I have found is to rescale the LSS drawing up by 1000, then find a common intersection ie corner of boundary line. This is not always very accurate.

The guys who do the LSS drawings tell me they cannot change the units to mm. Does anyone know if this is correct.

[#2]

Doen't matter if both were given to you with the same unit, no common points to align the drawings, they will always be inaccurate.

[#3]

Welcome to the world of DXF and different CAD programs interoperability (or lack of): you are on the right track, always find and use a known common point to merge the two files.

There are many options, sadly they work falls on your shoulders. Two options:

- Convert the DWG file in your possession to M and not MM: SCALE command then change the units. You will still need to locate the LSS file at the common point.

- Convert the DXF to a DWG first, then while in the surveyor drawing (and keeping track of your INSUNITS variable), INSERT the LSS file into it. SCaling should be automatic, but you will need to locate it as always. And you will still need to address the MM and M variations in dimensions etc.