The SWOS Geoportal acts at the same time as the Community Portal of the GEO-Wetlands Initiative. GEO-Wetlands is part of the Work Programme 2017-2019 of the Group on Earth Observations (GEO) since the GEO-XIII Plenary that took place in St. Petersburg in November 2016.
The focus of the initial version of the portal is to establish the visualization of geospatial maps including metadata, pixel information request, and statistics as well as the collection of wetland-related satellite data, images, videos, and external resources. An “Introduction tour” that can directly be started from the Welcome screen gives an overview of the tools and functionalities of the portal.
Geospatial products have been produced within SWOS for Land Use Land Cover (LULC), Land Surface Temperature Trend, Potential Wetland Areas, Surface Water Dynamics and Water Quality based on various Earth Observation satellites and sensors (Sentinel, Landsat, MODIS, MERIS). All maps can be visualized in the interactive map viewer. Furthermore, statistics for classified maps (e.g., classes in LULC map) can be directly retrieved without using own GIS software. The Water Quality maps exist as monthly time-series maps from 2002 until 2012 based on ENVISAT MERIS data. For each point in the Water Quality map an extraction of the time-series is immediately shown to users after point selection. Further maps produced from the SWOS project will be included in an updated versions of the portal.
The availability of satellite data based on Landsat and Sentinel archives has been extracted for each wetland and is shown to the user as chart and table. A more interactive way to show the results and filter down, e.g., by cloud cover percentage, will be introduced in an upcoming version of the portal. Also the display of individual scenes and pre-processed datasets can then be accessed directly in the portal.
Images and videos that are related to each wetland are listed on the portal as part of the “knowledge hub”. Images have been extracted from the Google Panoramio database. They will be extended with images from the Flickr database in an upcoming version. Videos have been searched within YouTube and made available for direct access in the portal.
External resources consist of links to websites and geospatial maps that can be directly added to the interactive map viewer on different scales (local, national, continental, global). As an example, the European Copernicus High Resolution Layers including Permanent Water Bodies and Wetlands as well as the Global Surface Water maps from the EC Joint Research Center (e.g., Annual Water Occurrence, Maximum Water Extent, Water Seasonality) can be added to the map viewer and used as supplement or comparison to maps from the SWOS project.
What is next?
We have planned further updates of the portal within the SWOS project to introduce the following features:
- Integration of service cases, indicators and further map products from SWOS
- Connection to the Global Earth Observation System of Systems (GEOSS)
- Discovery search of maps, images, videos, databases within the portal
- Enhancements of the satellite data discovery and access
- Products download tool (including metadata and map layout files)
- Individual view of portal for global, continental and national users
As a further outlook cloud-based data access and processing services will be tested until the end of the SWOS project including the services from Sentinel-Hub and on-demand product generation using the SWOS toolbox.