LGO

The lgo file extension is associated with the Microsoft Windows 3.x family of graphical environments for MS-DOS operating system (Windows 3.x is not separate operating system).

It appears that .lgo file stores boot logo of Windows in bitmap picture file format.

The LGO file extension is also related to to some sort of ListGeo format.

GeoTIFF fully complies with the TIFF 6.0 specifications, and its extensions do not in any way go against the TIFF recommendations, nor do they limit the scope of raster data supported by TIFF.

GeoTIFF uses a small set of reserved TIFF tags to store a broad range of georeferencing information, catering to geographic as well as projected coordinate systems needs. Projections include UTM, US State Plane and National Grids, as well as the underlying projection types such as Transverse Mercator, Lambert Conformal Conic, etc. No information is stored in private structures, IFD's or other mechanisms which would hide information from naive TIFF reading software.

GeoTIFF uses a "MetaTag" (GeoKey) approach to encode dozens of information elements into just 6 tags, taking advantage of TIFF platform-independent data format representation to avoid cross-platform interchange difficulties. These keys are designed in a manner parallel to standard TIFF tags, and closely follow the TIFF discipline in their structure and layout. New keys may be defined as needs arise, within the current framework, and without requiring the allocation of new tags from Aldus/Adobe.

GeoTIFF uses numerical codes to describe projection types, coordinate systems, datums, ellipsoids, etc. The projection, datums and ellipsoid codes are derived from the EPSG list compiled by the Petrotechnical Open Software Corporation (POSC), and mechanisms for adding further international projections, datums and ellipsoids has been established. The GeoTIFF information content is designed to be compatible with the data decomposition approach used by the National Spatial Data Infrastructure (NSDI) of the U.S. Federal Geographic Data Committee (FGDC).

While GeoTIFF provides a robust framework for specifying a broad class of existing Projected coordinate systems, it is also fully extensible, permitting internal, private or proprietary information storage. However, since this standard arose from the need to avoid multiple proprietary encoding systems, use of private implementations is to be discouraged.

The lgo file extension is associated with the MSWLogo development environment that allows programmers to create projects in LOGO programming language that is popular in education.

The lgo file stores program design.

The lgo file extension is associated with the OS/2 operating system developed by IBM.

The OS/2 Boot Logo format is used under OS/2 Warp versions 3 and 4 for storing the boot logo. The boot logo is the image that is shown at first when OS/2 starts up after a re-boot.

Under Warp 3, the size of the boot logo image is 640x400 pixels. The VGA resolution used at boot time is 640x480.

Warp 3 reserves 80 lines at the bottom of the screen for showing copyright information. This space cannot be used and thus the size of the boot logo must be 640x400. (Using a 640x480 boot logo under Warp 3 will result in an OS/2 TRAP at system startup.) Warp 4 does not reserve this space and a full-screen 640x480 boot logo may be used under Warp 4. The boot logo file is located on the root of the OS/2 boot drive. The name of the file is OS2LOGO and by default the file has the system attributes hidden, system, and read-only set. The default extension is LGO.

The LGO file extension is associated with the USGS Digital Line Graph file format. The U.S. Geological Survey's (USGS) digital line graph (DLG) files are digital vector representations of cartographic information.

Data files of topographic and planimetric map features are derived from either aerial photographs or from cartographic source materials using manual and automated digitizing methods.