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US Border
Airspace Files The link at the bottom of this page points to files depicting the US border with Canada and Mexico in various formats commonly used by glide computers. In the interest of broad compatibility with a large range of memory-limited devices and programs, considerable detail has been eliminated from the original data sets. Consequently, precision errors in the data of more than 300 feet are common, and errors approaching 600 feet are probable. Considering the limitations in the source data and processing methods described above, much larger total errors are possible. Neither the software used to produce this data nor the original source
data set have been certified for navigational use. Because of the limitations described herein, THE INFORMATION IN THESE FILES
MUST NOT BE RELIED UPON FOR NAVIGATION. Use of this information for any
purpose is solely at the user's risk. This information is provided free of
charge. No warranty, expressed or implied, as to the accuracy or suitability
of this information for any use is provided. Canada Border The Canada border files are based on a data set from the US Canada
Border Commission (now the International Border Commission) as published
in 2010. Mexico Border Border files are based on the Large Scale International Border (LSIB)
data set version 11.1(August 2022), as published by the Office of the Geographer
of the United States Department of State at https://geonode.state.gov. The editors note that limitations of source materials and
processing techniques exist. They state that most lines
will be within 100 meters of their actual position on the ground, but that
larger errors may occur. There is additional uncertainty caused by natural changes of course of the
Rio Grande river.
Some such changes may have occurred since the publication of the source
data set. (Press BACK to continue.) |