DISCHMEX - High-resolution daily snow ablation rates in an Alpine environment

We recorded snow ablation maps with a terrestrial laser scanner (TLS, Riegl-VZ6000) at the Gletschboden area. The TLS position is located approximately 30 vertical meters above the Gletschboden area at a northerly exposed slope. In total 44 TLS measurement sets have been conducted in three consecutive years 2014-2016 (2014: 13 measurements; 2015: 17 measurements; 2016: 14 measurements). The TLS system has a single-point measurement frequency of 300 kHz and a beam divergence of 0.007°. This set-up allows a horizontal resolution of approximately 0.01 m in 100 m distance to the TLS position. One scan of the Gletschboden area lasts approximately 15 minutes. The travel time from the laser scanner towards the surface is recorded and afterwards converted into a point cloud of distances. 5 reflectors located at the Gletschboden area and in the closer surroundings were additionally scanned during each measurement to transform the point cloud from the scanner own coordinate system into Swiss coordinates. Additionally, orthophotos have been created by using pictures recorded from the TLS in order to provide snow mask maps. Snow and bare ground can be distinguished by the RGB color information of the orthophoto. Cells with blue band information greater than 175 were categorized as snow and all cells with values smaller or equal 175 were categorized as bare ground.

Data and Resources

DEM 2014ZIP
Digital Elevation Modell 2014
- More information
- Go to resource
Snowmask 2016ZIP
- More information
- Go to resource
Gletschboden test sitePDF
- Preview
- Download
DEM 2016ZIP
Digital Elevation Modell 2016
- More information
- Go to resource
Snowmask 2014ZIP
- More information
- Go to resource
DEM 2015ZIP
Digital Elevation Modell 2015
- More information
- Go to resource
Snowmask 2015ZIP
- More information
- Go to resource

Additional information

Identifier

6b961ebc-1c86-45ec-8b6d-8efdd2e8babe@envidat

Title for URL of the dataset

dischmex-high-resolution-daily-snow-ablation-rates-in-an-alpine-environment

Schedule the publication of the dataset

Issued date

July 19, 2017

Modification date

October 31, 2019

Conforms to

Update interval

Temporal coverage

Publisher Information

EnviDat

Contact points

Languages

English

Url

https://www.envidat.ch/#/metadata/10-16904-envidat-25

Relations

Spatial

Related datasets

Documentation

Keywords

Terms of use

NonCommercialAllowed-CommercialAllowed-ReferenceRequired

Metadata Access

API (JSON) Download XML