Workshops are scheduled for Friday, June 13 (see also: detailed program)
| Workshop: Generating hydrographic products with GRASS GIS: A hands-on workshop on the Hydrography90m methodology |
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| Presenter: Giuseppe Amatulli |
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Description: GRASS GIS (Geographic Resources Analysis Support System) stands at the forefront of open-source geospatial analysis software, offering comprehensive tools for hydrological modeling and environmental analysis. This powerful suite excels in processing raster, vector, and time-series data. At its core, GRASS GIS provides sophisticated modules for essential hydrological tasks, from watershed delineation and stream network extraction to flow accumulation and surface runoff modeling. The software's robust Digital Elevation Model (DEM) processing capabilities enable detailed terrain analysis, crucial for understanding water movement across landscapes. What sets GRASS GIS apart is its flexibility and extensibility. Users can create advanced workflows by coupling hydrological models through BASH and Python scripting, and its plugin architecture is well suited for specialized hydrological analyses. The software's dual interface approach, combining an intuitive GUI with powerful command-line functionality, accommodates both newcomers and experienced users. Our upcoming workshop at Geomorphometry 2025 conference will explore the breadth of GRASS GIS’ capabilities and demonstrate the groundbreaking methodology developed by Amatulli et al. (2022) for creating the Hydrography90m dataset. Participants will gain hands-on experience in using GRASS GIS to generate high-resolution global hydrographic products, and learn techniques that are directly applicable to their own projects. Additional details here (PDF) |
| Workshop: Propagating DEM Uncertainty to Stream Extraction using GRASS GIS |
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| Presenter: Corey White and Caitlin Haedrich |
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Description: GRASS GIS is an open-source geospatial processing engine. With over 400 tools available in the core distribution and an additional 400+ tools available as extensions, GRASS GIS has broad applicability in the Earth Sciences and geomorphometry in particular. In this workshop, we will give an introduction to GRASS GIS and demonstrate some of the geomorphometry tools available in GRASS GIS. Specifically, we will show to compute stream extraction uncertainty using a workflow adapted from Hengl (2009). We will begin by downloading publicly available LiDAR data of the Perugia area using GRASS GIS data fetching tools. Then, we will use R’s kriging functions to create 100 iterations of a DEM. After exploring some of the stream extraction and flow routing methods available in GRASS GIS, we will extract streams from each of the 100 DEMs to compute stream uncertainty. The workshop will be conducted as a series of Jupyter Notebooks that are hosted in Google Colab. By the end of the workshop, participants will have hands on experience with: Additional details here (PDF) |
| Workshop: Geomorphometry with ArcGIS Pro and ArcGIS Online |
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| Presenter: Nawajish Noman (Esri) |
| Description: ArcGIS is widely used for land planning, resource management, agriculture, hydrology, disaster preparedness and other areas where geomorphometry tools are a key piece of the solution. This workshop will provide an overview of geomorphometry capabilities in ArcGIS and where to find them, with particular focus on newer, highly scalable geodesic tools and algorithms developed in the last few years. The workshop will be a mix of presentation, demonstration, and self-paced exploration. Participants will be provided access to ArcGIS Pro and ArcGIS Online geomorphometry capabilities, data, demo projects, and a variety tutorials to choose from. |
| Workshop: DEMIX Operations Platform |
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| Presenter: Axel CORSEAUX (VisioTerra) |
| Description: The DEMIX Operations Platform is an open-access web application developed as part of the ESA EDAP+ project in support of the DEM Inter-comparison eXercise (DEMIX). This platform manages versions of several global DEMs (ALOS World 3D, ASTER GDEM, COP-DEM, FABDEM, NASADEM, SRTM) and Very High Resolution (VHR) DEMs (1 to 2.5 meters) of countries or provinces of Brazil, France and Italy (Trento). In its latest version 2.1, the DEMIX Operations Platform allows to access the documentation and metadata of these DEMs, export DEM elevations in user-defined areas composed of DEMIX tiles (10 km x 10 km) by choosing its version and defining the output parameters: CRS, VRS, GSD, resampling method, type of pixel (point or area). The DEMIX Operations Platform also enables to apply a series of tests (criteria) to several candidate DEMs and visualise the ranking of these DEMs. |
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