What is a .BT file?
The file extension .BT stands for a Binary Terrain File, which is a type of GIS (Geographic Information System) file. It is created in the Binary Terrain (BT) format, a format specifically designed to store elevation data in a binary, or non-text, form. This means the file is not meant to be read as text but as data that computer programs can process.
The BT format was developed as part of the Virtual Terrain Project, which aims to create tools for visualizing digital terrain models. The format is favored because it is simple and compact, making it efficient for storing large grids of elevation data. These grids represent different heights (or elevations) of the Earth's surface and are used to create topographical maps, which show the shape and features of land surfaces.
The primary program known to open and handle .BT files is Blue Marble Geographics Global Mapper. This software is used for various mapping and spatial data analysis tasks, making it suitable for working with elevation grids stored in .BT files. It allows users to view, edit, and manage the data, facilitating tasks like planning, visualization, and simulation in fields such as geography, cartography, and landscape architecture.
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