losneomrade¶

Calculate maximum retrogression of landslides in quick-clay slopes, based on NVE Kvikkleireveileder 1/2019.

The core assumption: a slope of 1:15 is the conservative limit for landslide retrogression.

What does this package do?¶

Given a source area (where a landslide starts) and a Digital Elevation Model (DEM), this package calculates how far back the landslide could propagate. It provides three different methods for this:

Method	Module	Best for
Terrain Criteria	`terrain_criteria`	Fast pixel-by-pixel slope check over a DEM
Retrogression	`retrogression`	Step-wise propagation from an initial release area
Profile Retrogression	`profile_retrogression`	Cross-section analysis along terrain profiles

Quick links¶

Quick Start — Get running in 5 minutes
Theory — How each method works
API Overview — Function signatures and parameters
Configuration — Customize endpoints and settings
Contributing — How to help improve this package

Breaking changes in this update¶

This modernization pass intentionally includes a few breaking API changes:

Bounds order is now standard GIS order: (xmin, ymin, xmax, ymax) in all modules.
MSML clipping is now explicit: use mask=... instead of the old clip_to_msml flag.
Mask utilities moved: MSML- and AR5-related helpers now live in losneomrade.masks.
MSML source changed: MSML is now fetched from the NVE MapServer endpoint.

Check the Quick Start and API Overview pages before updating older scripts.