The BT file extension is used for binary terrain files. These store elevation data for displaying topographical maps. The Virtual Terrain Project created the format for compact elevation grid storage. BT files are used in GIS software to model 3D terrain maps. Programs that open BT files include VTBuilder and AutoDEM. VTBuilder is a common BT file handling tool. It was developed by VTP Software. AutoDEM also opens BT files. The data in BT files follows typical GIS file storage methods. 255 different software programs use the .BT extension across operating systems. If your software cannot open a BT file, it may be an outdated version. Update your program to support the latest BT file format. You can also scan the BT file for viruses with antivirus software.
3DEM