Hot answers tagged dwg
6
It depends on what you mean wih import. Import data to actually do something with it, or just to have a background layer for viewing. Also consider this: In GIS, basic building blocks are points, lines and polygons (sometimes called basic topological types), and inside CAD, you are working with drawings which can be made of anything, including objects that ...
6
FME will convert data between formats and has a good story for transforming CAD > GIS.
See: http://www.safe.com/solutions/GIS/CADtoGIS.php
Disclosure - I do work for Safe Software, the creators of FME.
But it is ideal for this scenario, otherwise I wouldn't suggest it.
As to problems with CAD into GIS, one other issue is geometry types.
CAD typically has ...
5
GRASS GIS 6.4 supports import and export of 2D and 3D DXF through v.in.dxf and v.out.dxf. In GRASS-Addons there is a new prototpype for a DWG import module, based on LibreDWG.
5
There may or may not be projection information in the autocad drawing. If there is it can be read only with one of the GIS products from Autodesk (i.e. map3d, civil3d, mapguide).
You will need to either...
1. use an autodesk product to discover the assigned crs.
2. contact the originator and find out the crs.
3. convert to a format you can use (probably ...
5
This message:
During translation, some features were read that did not match a
reader feature type in the workspace. This can happen if the reader
dataset is changed, or a reader feature type removed or renamed.
...should have nothing to do with how the data is written, just what is read. This FME Evangelist post should explain that part of the ...
5
What are the biggest issues
I dont have the time (right now, ill try edit later) to provide a detailed answer, but the main issue with CAD data is typically, CAD technicians create plans with no regard to coordinate systems. i.e. They plot around the origin of 0, 0,
= I've work on plenty of projects where people dont understand that a bit more work is ...
4
It seems to me that the main problem for you is to introduce some order to your tons of DWG/DXF files with information (in several layers).
Regardless of choosing software/tool I can recommend you to describe your data. Here is some thoughts:
You should develop some kind of unique codes for all types of your features. It can be one attribute or several or ...
4
Is it possible to create CAD file from shapefile and also create CAD blocks from the database fields
FME can do Shape to AutoCAD Blocks
This was modified (for FME 2013) from the original on FMEPedia
http://fmepedia.safe.com/articles/How_To/Creating-AutoCAD-Blocks-with-FME
Product:
FME Desktop
http://www.safe.com/fme/fme-technology/fme-desktop/overview/
3
autocad map 3d will easily geo-reference your dwg/dxf files and allow conversion to 12 gis formats.
Unless you add FME desktop also (FME extsion for ArcGIS).
Then with FME extended to arcmap and autocad you have all ~275 formats.
But doing it through map3d you have access to some particularly useful tools.
(i.e. select by layer, color, linetype, or even ...
3
Autodesk DWG TrueView is a a free stand-alone .dwg viewer with DWG TrueConvert software included. It includes PDF plotters so you can directly plot to pdf. This would be the most reliable option.
you can download from Autodesk Website
There is a Plot/Batch Plot option too
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You need to understand the CAD file format (DWG have many variants) and going to a folder based format (File Geodatabase).
Note: ArcGIS does need to be installed for conversion to ESRI Geodatabase formats. [But not shapefiles]
Here is a video from Safe Software last week [22nd November 2011] CAD to GIS formats
...
3
Relima;
I've had this same quest for a while now, I've managed to do it relatively easy with Kosmo in X simple steps:
Convert dwg to dwg 2000 with Teigha File Converter fro the Open Design Alliance;
Open this dwg in Kosmo;
Save it as an ESRI Shape file, as you mention it will create 2 or 3 shapes point, polygons and lines;
Select elements by the field ...
3
Consider ogr2ogr ( http://www.gdal.org/ogr2ogr.html ) for future data conversion needs. It is part of the ogr ( http://www.gdal.org/ogr/ ) project. This is a command line utility to will convert to/from just about anything ( http://www.gdal.org/ogr/ogr_formats.html ).
From the website:
"This program can be used to convert simple features data between file ...
3
DWG is a proprietary format owned by Autodesk -> people aren't allowed to just reverse engeneeir it.
I believe that the commercial teiga package (what ogr uses for DWG support) requires licencing: you have the pay a montly fee .
OSGEO can't include it in their distribution, only paying members can.
Mayby you can use their converter to convert you DWG to ...
2
If you're just trying to get to a gis-friendly format from a DWG/DXF creator, you might try Bentley Microstation (probably with the 'Map' extension), it will import & read dwg/dxf files just fine, and can export those elements & features to a shapefile or something else you could read into a GIS package. It's a bit 'closer to the source' solution but ...
2
GDAL/OGR supports read&write for DXF, so any GIS that uses GDAL(QGIS, GRASS) should allow you to at least use that format. The only time i really use the CAD formats is exporting data for one of our engineers so i don't have much experiecne other than exporting into DXF.
There is another DWG/DXF driver for GDAL available the offers write only support, ...
2
ArcGIS can import AutoCAD data quite easily. You can use the georefencing tools if need be but often it is necessary to export the drawing to an ArcGIS format in order to utilize the spatial adjustment tools. You can also export to DXF and DNG but i am not sure how usable the files are on the AutoCAD end. I know i can open and edit them but have had problems ...
2
http://www.opendesign.com/teigha_file_converter
But DWF is only available from AutoCAD
2
AutoDWG DWG2DWF Converter a batch converter converts DWG/DXF to DWF without need of AutoCAD.
Select a project (folder), and generate a dwf file for each dwg file in the project, then publish them to the Internet/Intranet or the drawing management system.
The command line will allow you to convert dwg to dwf in silent without interface.
2
It sounds like you have some major batch processing and therefore, I would be inclided to script this. Doing this all by hand might be feasible but a pain. At least with a script, if you muck something up you can just correct the script and re-run. Also, you have a chance to unify a lot of the non-standard naming etc by using regular expressions and ...
2
If you have access to autocad map. I would suggest that method over the method proposed.
Autocad map can output vector data to several gis formats.
I also use it by setting up a drawing base file which I use the fdo interface to view one or more shape files with known projection.
I then query in the dwg that I want to geo-reference. This allows me to move, ...
2
For future reference, it helps to add as much relevant information to your question as possible in order to obtain the best answer. In this case, something that would be useful is to say what projection you think your CAD file should be in, and possibly give a screenshot of the coordinates you are seeing when you have loaded the CAD file into ArcGIS.
You ...
2
You can convert the DWG files to DXF (which QGIS does support) using the Teigha® File Converter. It's a free (not open source unfortunately) cross-platform application provided by the ODA to end users only for the conversion of .dwg and .dxf files to/from different versions.
The following platforms are supported:
Linux (OpenSUSE 11.2/Ubuntu 10.10 x86)
...
2
the two things you are asking for don't go together.
If you want the layout it will ONLY have paper coordinates.
If you want real world coordinates it will never know the orientation of your paper (or layout).
The work around would be to get the data in the dataframe exported (using the export to cad function for each data layer you want in the drawing.
(you ...
2
My advice would be: using FME. But you have to know the crs of the data in you dwg. Then in fme you simply drag the dwg to the workspace, add a destination dataset, and link them via reprojector transformer (use your dwg crs for source crs and LL84 for destination crs). Some features from dwg may not be supported in kml, so i would throw a geometry filter ...
1
DWG is a proprietary, closed format. As many would be able to confirm is one of the less interoperable formats. Long story short: it is not possible to open a DWG file with an Open Source software/library. There are/were attempts to create an OS library to read dwgs but afaik they don not work very well. If there is software other than Autodesk that can open ...
1
Use Spatial Adjustment but you will have to import DWG/DXF to an editable data format first (Shapefiles or and geodatabase features classes).
Personally I would also obtain some data which you can use for geographical reference; road intersections, geodetic "survey" markers.
Are you sure the DWG/DXF file is not projected to a coordinate system already? ...
1
You can also upload your dwg to https://www.autocadws.com en convert it from there (use the "download" button).
You can definitely upload to autocadws using webdav, not sure if the conversion can be applied from the api. Have a look at:
http://www.autocadws.com/tutorials/autocad-ws-apis-c-client/
One advantage is that autocad ws can handle whatever dwg ...
1
IrfanView is free and has a variety of plugins. You can read a DWG and write to PDF. Also, IrfanView has a commandline interface. If this doesn't open the latest DWG version, you can convert your DWG to an older version using Teigha File Converter. I think this has a command line option, as well.
1
To convert your CAD files to GIS, you'll need to add georeference information to your cad files. If your CAD files are in some recognizable coordinate system, you can assign those to your files, otherwise you'll have to 'manually' georeference the CAD file to translate the local coordinates to a projected coordinate system.
I found this nice guide [PDF] at ...
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