---
name: "ossim-slope"
section: "1"
platform: "linux"
package: "ossim-core"
version: "2.9.1-3+b1"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/ossim-slope"
---

# ossim-slope(1)

ossim-slope

## NAME

ossim-slope - ossim-slope

## SYNOPSIS

**ossim-slope** \[*options*\] *\<output-image\>*

## OPTIONS

- **--center** \<lat\> \<lon\>

  The center position of the output product. Required if no input DEM is specified.

- **--dem** \<filename\>

  Specifies the input DEM filename. If none provided, the elevation database is referenced as specified in prefs file for the center and ROI specified.

- **--disable-elev**

  Will disable the elevation

- **--disable-notify**

  Takes an argument. Arguments are ALL, WARN, NOTICE, INFO, FATAL, DEBUG.  If you want multiple disables then just do multiple **--disable-notify** on the command line. All argument are case insensitive.  Default is all are enabled.

- **--disable-plugin**

  Will disable the plugin loader

- **--lut** \<filename\>

  Specifies the optional lookup table filename for mapping the single-band output image to an RGB. The LUT provided must be in the ossimIndexToRgbLutFilter format and should accommodate the output pixel range. This option forces remap to 8-bit, 0-255 where 255 = 90 deg slope

- **--ossim-logfile**

  takes a logfile as an argument.  All output messages are redirected to the specified log file.  By default there is no log file and all messages are enabled.

- **--remap**

  The range of slope angle (0.0 to 90.0) is remapped to 0-255 (one byte/pixel)

- **--request-api**

  Causes applications API to be output as JSON to stdout. Accepts optional filename to store JSON output.

- **--roi** \<meters\>

  radius of interest surrounding the center point. If absent, the product defaults to 1024 x 1024 pixels, with a radius of 512 \* GSD. Alternatively, if a DEM file is specified, the product ROI defaults to the full DEM coverage.

- **-K**

  specify individual keywords to add to the preferences keyword list: name=value

- **-P**

  specify a preference file to load

- **-T**

  specify the classes to trace, ex: ossimInit\|ossimImage.\*

will trace ossimInit and all ossimImage classes-

Utility for computing the slope at each elevation post and generating a corresponding slope image. The output scalar type is a normalized float with 1.0 = 90 degree angle from the local vertical. Optional 8-bit scalar type is available.Examples:

-

  ossim-slope \[options\] **--dem** \<input-dem\> \<output-slope-image-file\> ossim-slope \[options\] **--center** \<lat\> \<lon\> **--roi** \<meters\> \<output-slope-image-file\>

## SEE ALSO

The full documentation for **ossim-slope** is maintained as a Texinfo manual.  If the **info** and **ossim-slope** programs are properly installed at your site, the command

-

  **info ossim-slope**

should give you access to the complete manual.