Differentiate between ucs and wcs in autocad

I hope that wasn't too confusing for you? If so let me know and I'll see if I can come up with a simpler example for you. Whereas, if you use ( trans ( vlax-curve-getstartpoint vla-obj) 0 1) your WCS insertion point, would now be converted to your current UCS (exactly where you specified). If you wanted to insert some text at the start point of a line, and used vlax-curve-getstartpoint to get the coordinates for that point, but your UCS was rotated 90 degrees, and it's origin was displaced from the WCS origin, then inserting text at the coordinates returned from the vlax-curve-getstartpoint function ( in WCS) would result in a text object off in space somewhere.

:wink:ДЄs for the trans function, let's try this example. Seemingly simple solution, don't rotate your UCS before making the text.

Then rotate the drawing back 180 degrees ( making the drawing right-side up again).You rotate the UCS 180 degrees ( upside down).When we link a file this way a warning will appear while it is loading. This assumes that each of the site related files are already aligned with each other using the same WCS origin. UCS and then draw a line between the selected point and the. Using the SOLVIEW command create a Ucs, World (scale1) in the upper.

Once shared coordinates are defined based on our first file we can import other site files using the positioning option: by Shared Coordinates. A blog for developers programming with Autodesk platforms, particularly AutoCAD and Forge. We again use the SOLVIEW and SOLDRAW commands. Now regarding the title of this post, importing the rest of the files. By relationship I mean that Revit records the identity of the linked file in the project when/if Acquire Coordinates is used to align the project with the linked file's WCS origin. Keeping in mind that doing so doesn't establish a shared coordinate relationship between the CAD file and the project. In contrast I also like to use Specify Coordinates at Point (SCaP), using the marker I created earlier. I find that Revit will acquire very large coordinates accurately IF the file is pristine. If Acquire Coordinates didn't work then we need revisit the items above, especially Named UCS. User Coordinate System, and they appear wherever the. UCS axes can be displayed by selecting Workspace /. coincide with the WCS, but it can be moved and relocated by. As far as I know, all coordinates stored in DXF files are always WCS or OCS never UCS. All points passed to AutoCAD commands, including those returned from AutoLISP routines and external functions, are points in the current UCS. Once we've used Acquire Coordinates on our first survey file and verified the resulting coordinates are correct we can import the rest of the site related files. The User Coordinate System (UCS) is the coordinate. UCSВ¶ User coordinate system - the working coordinate system defined by the user to make drawing tasks easier.

Once you get a working first survey file, pass it back to the surveyor so they know what you need in the future.

the plan (top) view, you would not be able to see any difference between the two lines.

Make sure everything actually aligns correctly in AutoCAD first, no point setting it up in Revit if it doesn't work there This is the usual view you have seen when using AutoCAD in 2D.

The user specifies a UCS to make drawing tasks easier. UCS User coordinate system (UCS): The working coordinate system. All points passed in and out of ActiveX methods and properties are expressed in the WCS unless otherwise specified.

Identify a specific location within the relevant part of the survey, put a marker, identify its coordinates, better still make those coordinates easy to use, even clean numbers. Values measured relative to the WCS are stable across changes to other coordinate systems.

If the survey isn't oriented to WCS, North is 'up', have the civil engineer/surveyor change their file first.

Set UCS (User Coordinate System) to WCS and Plan to WCS.

Remove Named UCS (Revit only wants the World Coordinate System).

Use Wblock if you can't get Zoom Extents to focus on just the relevant portion of the site.

Purge everything you don't need, purge again.

Import multiple Survey files individually (don't nest them as xref's) COORDINATE SYSTEMS World Coordinate System (WCS) User Coordinate System (UCS) Drawing Commands LINE RECTANGLE CIRCLE POLYLINE ARC ELLIPSE.

I recommend these steps to improve the odds for success: The reality couldn't be further from that.

I wish I could write that linking/importing survey files was very simple and error free. Revit will forcefully use that option when the extents of the file violate the current 20 mile tolerance it has. The developers have always encouraged us to use the Auto - Center to Center positioning option with those files. When we link/import DWG files with survey data Revit often encounters file extents that are quite large.

Differentiate between ucs and wcs in autocad