Extraction of a hierarchical and homogeneous structure of subbasins from a given area with the HortonMachine GeoFrameInputBuilder
2021-09-29, 10:30–11:00, Puerto Madryn

The HortonMachine library is a Free and Open Source geospatial library containing tools for data management (raster, vector and point cloud), data collection in the field, and environmental modelling. The environmental models are mainly related to hillslope stability, floods, debris flow and woody (Large Wood) floods.
The HortonMachine is actually a suite of independent tools, a package of applications (i.e. SpatialToolbox, DBViewer, GForm) without a specific GIS support. The input and output geospatial data follows the main OGS standards and can be visualized within anyone’s preferred GIS.

In the last year a set of modules of the SpatialToolbox have been developed to perform geomorphological analysis to automatically delineate a hierarchical structure of basins and subbasins for a selected area. The result of the analysis will be the input of the integral distributed hydrological model GEOframe. The GEOframe application is a complex system with more than 50 components used to simulate the complete hydrological cycle within a watershed (Spatial extrapolation/interpolation of meteorological variables; Estimation of the radiation budget, evapotranspiration, runoff production; Simulation of infiltration; Calibration).

The first tool is an improvement of the original NetNumbering algorithm with a new feature to homogenize the area of the extracted basins and, at the same time, it saves the hierarchical structure of the basins which can be used to navigate the network upstream and downstream. Based on the output of this model the new GeoFrameInputBuilder tool creates the complete input folder of the geomorphological inputs of the GEOframe model.

The presentation will give a short introduction of the HortonMachine geospatial library and of the GeoFrame hydrological model. The main part will be concentrated on the developed tools to extract and prepare the data to run a full cycle hydrological model in only two steps starting from geospatial data.

Authors and Affiliations

Silvia Franceschi (1)
Andrea Antonello (1)(2)
Riccardo Rigon (3)
Giuseppe Formetta (3)

(1) HydroloGIS s.r.l. Bolzano - Italy
(2) Free University of Bolzano
(3) University of Trento - Department of Civil and environmental engineering

Requirements for the Attendees

To like geomorphology and hydrology.


Use cases & applications


FOSS4G implementations in strategic application domains: land management, crisis/disaster response, smart cities, population mapping, climate change, ocean and marine monitoring, etc.


2 - Basic. General basic knowledge is required.

Language of the Presentation


Silvia Franceschi: MSc in Environmental engineering, master in Project Management and PhD in Mountain Environment and Agriculture.
Specialized in hydrology, geomorphology and hydraulics, she developed and applies environmental models for engineering projects in particular related to the natural hazards and the maintenance of
natural resources.

Environmental engineer addicted to scientific GIS development, playing in the field of hydrologic and geomorphologic modelling. Cofounder of the engineering consulting company HydroloGIS, lecturer of Advanced Geomatics at the Free University of Bolzano. OSGeo charter member and coordinator of the open source projects Hortonmachine, Geopaparazzi and SMASH digital field mapping.

This speaker also appears in: