the map service “Transversal sections of waterways — Topography, flow rates, levels, speed” shows the location of the cross sections of the watercourses and makes the associated data available (by querying the single section): data on the geometry of the riverbed and surrounding land, interfering artifacts data and hydraulic data.;In the case of interfering artefacts, an assessment of hydraulic compatibility, expressed as hydraulic outflow and/or hydraulic compatibility assessment, as reported in the studies from which these data were derived, is reported in the studies from which these data were derived.;The source of the data (topographic and hydraulic) is; always specified in two special fields ("Topography Source" and Hydraulic Data Source") visible by querying each topographic section and present in its shapefile. With regard to the data of interfering artifacts, in the field “Year_verification” is shown the year to which, in fact, the verification of hydraulic compatibility refers.;The shapefiles relating to sections and bridges can be downloaded from the Geoportal download service; from the map service (left menu-linked documents) it is possible to access the sections in.xls format and some reference documents.;The document downloadable from the service metadata describes in detail the origin and structure of the data.