TG4 File – What is .tg4 file and how to open it?
TG4 File Extension
Tiled Group 4 Raster Image File – file format by Bentley Systems
TG4 (Tiled Group 4 Raster Image File) is a file extension developed by Bentley Systems for storing raster images. It uses a Group 4 compression algorithm to reduce file size while preserving image quality. TG4 files are commonly used with Bentley’s MicroStation software.
TG4 File Format
A TG4 file, also known as a Tiled Group 4 Raster Image File, is a raster graphics file format used by Bentley Systems, a software development company specializing in engineering and design software. TG4 files are primarily utilized to store geospatial imagery, such as aerial photographs and satellite images. They are commonly encountered in the context of computer-aided design (CAD) and geographic information systems (GIS).
TG4 files are characterized by their use of Group 4 (G4) compression, a lossless compression algorithm that preserves the quality of the original image while reducing its file size. The compression method involves dividing the image into small tiles and applying Huffman encoding to each tile. This approach allows for efficient storage and retrieval of geospatial data without significant loss of detail. Additionally, TG4 files support the inclusion of metadata, such as georeferencing information, which can be used to align the image with real-world coordinates.
Opening TG4 Files with Compatible Software
TG4 files can be opened and viewed using software programs such as Bentley MicroStation and Bentley Map. These programs are specifically designed to work with TG4 raster image files, allowing users to view, edit, and manipulate the images.
To open a TG4 file in MicroStation, click on the “File” menu and select “Open.” Navigate to the location of the TG4 file and select it. The file will open in MicroStation, and you can view and edit the image.
To open a TG4 file in Bentley Map, click on the “File” menu and select “Open Geospatial.” Navigate to the location of the TG4 file and select it. The file will open in Bentley Map, and you can view and edit the image.
Converting TG4 Files to Other Formats
TG4 files can also be converted to other raster image formats, such as JPG, PNG, and TIFF. This can be useful if you want to share the image with someone who does not have the software to open TG4 files.
To convert a TG4 file to another format, you can use a file conversion program, such as XnView or IrfanView. These programs allow you to select the TG4 file you want to convert and then choose the output format. The converted file will be saved in the location you specify.
Tiled Group 4 Raster Image File (TG4)
Bentley Systems developed the TG4 file extension, specifically designed for tiled Group 4 raster images. Group 4 is a two-level orthogonal compression encoding scheme, utilizing a lossless, one-dimensional Huffman coding technique. TG4 files are employed to store geospatial data, such as aerial imagery and scanned maps, with high accuracy and detail.
The TG4 format is widely used in the architecture, engineering, and construction (AEC) industry, thanks to its ability to efficiently manage and process large image datasets. TG4 files typically contain multiple tiles, each representing a specific region or section of the overall image. This tiling approach makes it easier to handle and manipulate large images, especially in situations where portions of the image are frequently accessed or modified.