You can open an existing 2D or 3D drawing with the File->Open... menu option. Alternatively, you can click the File Open button toolbar button, or press the Ctrl+O on the keyboard.

You will see the standard window for selecting a file:

File Open dialog

Select the file that you want to open.

You can restrict the type of files that you see by using the Files of type: drop-down list.

NOTE: you can enter any kind of URL for the file name. For example http://www.topogx.com/samples/pond.dxf will pull a sample file straight off the web.

File types

The following files types are loaded by Site3D:

DXF Files (*.dxf)

This is an industry standard file format for drawing exchange. The DXF file format originates from AutoDesk Inc. for their AutoCADTM product line, but nearly all CAD related software will load or produce a DXF file. Site3D will load all versions of DXF file, right through to the latest AutoCAD release.

DWG Files (*.dwg)

The DWG file format originates from Autodesk Inc. for their AutoCADTM product line, but has also more recently been adopted by the Open Design Alliance.

Note: To import DWG format files it is necessary to have the free DWG/DXF Converter application installed. If you have not yet installed the converter, you will be prompted to do so when you try to import/export a DWG. It will offer to show you the web-page where the converter can be downloaded for install. After installing the converter, DWG export and import will operate seamlessly.

Ordnance Survey GML Files (*.gml)

GML is an alternative format to DXF for digital vector mapping drawings from the UK Ordnance Survey. GML has the advantage of retaining the coloured regions representing the differing land usages, and so generally produces a more visually pleasing drawing than the equivalent DXF from the OS.

Note: you can use Site3D to load a GML file and output as a DWG or DXF retaining the same visual appearance.

DEM Files (*.asc)

For Digital Elevation Models. This file format holds height level data in the form of a regular grid of points. There are quite a few different variations on this file format. If you find one that does not load in Site3D then please e-mail us so that we can add support for it. DEM data is more commonly used in the GIS industry than the CAD industry.

ERSI Shapefile (*.shp)

The Shapefile format is used widely in the GIS (Geographic Information Systems) industries. The CAD type data (for example, lines and regions) will be imported from the Shapefile .

MX GENIO Files (*.mos, *.inp, *.txt)

This file format originates from the Bentley MXTM system (formerly Moss). This is the GENIO model format that MX loads and generates. There is very little feature information in a GENIO file, but Site3D tries to assign to different drawing layers based on the 4 character string labels that are present in GENIO files.
The GENIO model can look a lot better in the 3D view of Site3D than in MX (Site3D will also display it very much faster), so you may find Site3D very useful for visualising your MX project data.

Comma Separated Values XYZ Files (*.xyz, *.csv)

This is raw X,Y,Z point data in ASCII format. The coordinates may be comma or space separated. Some DEM files may be in this format. Alternatively, the points may be non-regular point-cloud data.

Lidar LAS Files (*.las)

Lidar systems usually create a cloud of 3D points from the laser ranged surface. Site3D loads this data and forms the 3D surface model.

Google KML Files (*.kml)

Geometry added by Google Earth can be loaded into Site3D. If the model is within UK lat/lon then it is automatically converted to the equivalent UK Ordnance Survey coordinates.

Site3D Project Files (*.erd)

This is the native file format for Site3D. An ERD file holds all the project's information, including any data that was loaded from other sources.


See Also: