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 e Risorse

DEM 2014ZIP
Digital Elevation Modell 2014
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Snowmask 2016ZIP
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Gletschboden test sitePDF
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DEM 2016ZIP
Digital Elevation Modell 2016
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Snowmask 2014ZIP
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DEM 2015ZIP
Digital Elevation Modell 2015
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Snowmask 2015ZIP
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Informazioni aggiuntive

Identificatore

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

Titolo per l’URL del dataset

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

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Data di pubblicazione

Luglio 19, 2017

Data ultima modifica

Ottobre 31, 2019

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Dataset Information

EnviDat

Punti di contatto

Lingue

Inglese

Url

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

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Spaziale

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NonCommercialAllowed-CommercialAllowed-ReferenceRequired

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