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Site

This article covers all site options in Virto.CAD, from loading images and terrain from satellite data to converting imported terrain formats and analyzing them.

Select the Site feature, as shown below, to view the three main tabs: Location, Terrain, and Analysis.

 

Location

In the Location tab, you can geolocate your drawing. In the Geographic Location section, click Georegistration to open AutoCAD’s geolocation feature. From there, you can enter either an address or the coordinates for your project location. After placing the marker in the correct position, you will be prompted to select the coordinate system you want to use. When you click Next, the window will close, and you will be asked to choose the 0,0,0 point within your drawing space. Then, draw a straight line in the direction you want north to be.

Once this is defined, the imagery linked to AutoCAD will appear.

Another option is to upload a KML or KMZ file which you can do from the Import KMZ/KML option.

If your drawing is already georeferenced, you can also Import Satellite Image from the third section of the Location tab. Simply choose the image size you want to import and click Load Image. The image will appear instantly around the origin of your drawing.

 

Terrain

In the Terrain tab, you can Import Satellite Terrain by drawing a rectangle or polygon around the desired area, or by selecting an existing boundary if you have one.

The terrain is created as a mesh, which is required for building your design in Virto.CAD.

If you already have topography height lines available, you can also convert them into a mesh using the Convert Height Lines option. In this section, select the correct layer for your height lines and click Convert Terrain.

If your file contains more than one terrain, make sure the correct terrain layer is selected in the final Active Terrain section, as this is the one that will be used throughout the rest of the design process.

Note: If you want to change the grid size of your mesh, whether it comes from satellite terrain or your own topography, use the `VIRTO_SIMPLIFYMESH` command and specify the desired grid size. A new mesh will then be created.

Analysis

In the Analysis tab, you can analyze your terrain by Slope Angle or Slope Direction.

Slope Angle: Select the number of ranges you want to display, for example 6. These will be automatically divided into 6 ranges, but you can adjust the limits and change the color used for each one.

Slope Direction: The number of ranges is fixed at 8, but you can change the color used for each direction.

Click Load Analysis, then place your cursor over the terrain to display the result.

 

Data Source:

The following datasets are currently used: