---
name: "diffpos"
section: "1"
platform: "linux"
package: "survex"
version: "1.4.17-1+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/diffpos"
---

# diffpos(1)

compare two processed data files

## NAME

diffpos - compare two processed data files

## SYNOPSIS

**diffpos** *FILE1* *FILE2* \[*THRESHOLD*\]

## DESCRIPTION

Diffpos reports stations which are in one file but not the other, and also stations which have moved by more than a specified threshold distance in X, Y, or Z.  *THRESHOLD* is a distance in metres and defaults to 0.01m if not specified.

Note that the input files can be any format the "img" library can read (and can be different formats), so it works with Survex **.3d** and **.pos** files, Compass **.plt** and **.plf** files, CMAP **.sht**, **.adj** and **.una** files.

## OPTIONS

- **--help**

  display short help and exit

- **--version**

  output version information and exit

## SEE ALSO

[**aven**(1)](/aven/1.md), [**cavern**(1)](/cavern/1.md), [**dump3d**(1)](/dump3d/1.md), [**extend**(1)](/extend/1.md), [**sorterr**(1)](/sorterr/1.md), [**survexport**(1)](/survexport/1.md)

## COPYRIGHT

1998-2025