Spacer
Mapping
Mapping > Geospatial Data

Landslide Mapping in Swiss Alps

  26/09/2012
Archived radar data from the Envisat mission are being used to support the generation of regional hazard maps, including playing an important role in mapping landslides in Switzerland. The missionís vast archives continue to prove useful for mapping ground deformation. From their orbits some 800km high, satellite radars can detect such ground deformations to within centimetres. Combining two or more radar images of the same area reveals positional changes

 

 Hazard mapping in Swiss Alpes

This technique, called Differential Interferometric Synthetic Aperture Radar – or DInSAR – has become a useful tool for detecting ground deformation. The Swiss corporation Gamma Remote Sensing began using DInSAR on Swiss landslides with data from ESA’s ERS missions in 2000. Following Envisat’s launch in 2002, they continued to detect and monitor alpine land displacement for the next decade.

 

Landslides are a natural hazard of special relevance in Alpine regions. This ground displacement can severely damage human lives and infrastructure. The information can then be used by local authorities in planning safe and durable infrastructure, as well as for mapping risk to existing infrastructure. 

Using the radar data, Gamma Remote Sensing provides deformation maps that are used by Swiss cantons to generate regional hazard maps. This process is overseen by the Swiss Federal Office for the Environment, which is responsible for minimising natural hazards, protecting the environment and reducing risks to human health.

 

The Envisat mission ended in April after doubling its lifetime, but its radar data are still being used for generating regional hazard maps. Gamma Remote Sensing will continue to use archived Envisat data for their landslide inventory work, and the commercial alternatives TerraSAR-X, Cosmo-Skymed and Radarsat-2 are now providing complementary data for monitoring.

 

From 2014, data from the Sentinel-1 mission will be used to build upon the existing archive and provide monitoring. The Sentinel family of satellites is being developed for Europe’s Global Monitoring for Environment and Security (GMES) programme.

 

Image: Regional hazard map over an area in western Switzerland showing rock falls in pink and landslides in orange and yellow. Radar data from the Envisat satellite are still being used to support the generation of regional hazard maps. Image courtesy: Canton Bern


Read more about:  remote sensing  mapping  satellite 
Supplier: European Space Agency

More news from this supplier:
Copernicus Masters Contest Seeks New Ideas for Satellite Data
Sentinel-1A Satellite Launch Marks Beginning of New Era
ESA to Certify First Galileo Position Fixes Worldwide
ESA Helping to Prepare Satnav Mass Market for Galileo Services
Satellite Radar Imagery Shows Arctic Environmental Changes
CryoSat Satellite Shows Increase in Antarctica's Ice Loss
Scientific Community Considering Galileo Development and Use
Swarm Watching over Earthís Magnetic Shield
Swarm Earth Magnetic Field Observation Mission Ready for Launch
GOCE Gravity Mapping Satellite Falls to Earth Safely


Satellite Navigation Contest: Turning Satnav Ideas into Business
AfricaGEO to Highlight Geomatics Practice in Africa
Esri Press Honoured by Association of American Geographers
Hyperspectral Imager for Measuring Plant Photosynthetic Activity
RIEGL LIDAR 2015 to Take Place in Hong Kong and Guangzhou
Intergeo Round Table Focuses on Digital Infrastructure
Remote Sensing to Improve Water Management Planning
Solution for Quickly Generating Automated Oblique Projects
Airbus to Deliver 3D Urban Mapping Solution to PASCO
Seeking Indoor Continuity for GNSS Positioning Solution


   


comments powered by Disqus
Top News
Upcoming Events
Spacer
Spacer
3D model of a real forest from airborne Lidar

The terrain was prepared from aerial ortho-image of 30 cm resolution. Lidar derived Canopy Height Model was worked at 15 cm resolution. For keeping the uniformity with Lidar derived layers, the ortho-image was used at 15 cm pixel size.

 

Last 3 items:
Spacer
Last Comments
Spacer
Spacer
Spacer
Spacer
Spacer