---
name: "nad2bin"
section: "1"
platform: "linux"
package: "proj-bin"
version: "5.2.0-1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/nad2bin"
---

# nad2bin(1)

convert nad ASCII files into binary format usable by nad2nad

## NAME

nad2bin - convert nad ASCII files into binary format usable by nad2nad

## DESCRIPTION

This command is undocumented upstream.  This very rough documentation was quickly assembled by your friendly Debian maintainer (who doesn't use this command, and so is not the best person to document it!).

The  **proj** package includes the  *nad2nad* binary, the North American Datum conversion filter used to convert data between North America Datum 1927 (NAD27) and North American Datum 1983, and *cs2cs* a binary that performs transformation between the source and destination cartographic coordinate system on a set of input points.  The coordinate system transformation can include translation between projected and geographic coordinates as well as the application of datum shifts.

See the *[nad2nad(1)](/nad2nad/1.md)* and *[cs2cs(1)](/cs2cs/1.md)* man pages for more information.

**nad2nad** and **cs2cs** need arch-dependent conversion data files in a library directory,  */usr/share/proj/* Those files are included in the proj Debian package since 4.6.1-5. To produce/update them yourself, get the \*.lla files from

**http://download.osgeo.org/proj/proj-datumgrid-1.5.zip**

and then run  **nad2bin** to produce the binary files used by  **nad2nad** and **cs2cs** like so:

**# nad2bin \< conus.lla /usr/share/proj/conus**

Test nad2nad with the following example:

**$ nad2nad -i 83 -o 27 -r conus \<\< EOF**

71d14'58.27"W   44d20'15.227"N

EOF

It should produce:

71d15'W 44d20'15"N

## SEE ALSO

**[nad2nad(1)](/nad2nad/1.md), [cs2cs(1)](/cs2cs/1.md)**

## AUTHOR

This manual page by Peter S Galbraith \<psg@debian.org\>.