Geographic Information System
In which direction is Italy looking?
Tutorial to calculate the exposure of the Italian territory using DEM and QGIS. Analysis of slopes and cardinal directions to find out in which direction Italy "looks".
qgis
Posts related to the tag qgis
PyGIS Blog
Check the photovoltaic potential of a roof
Learn how to estimate the photovoltaic potential of a roof using QGIS and Python. Analyze inclination, orientation and energy production to optimize the installation of a system.
PyGIS Blog
Intervisibility analysis
Find out how to perform a visibility analysis (viewshed) with Python, using the ISPRA DEM and libraries such as GeoPandas and xarray to calculate the areas visible from various observation points.
PyGIS Blog
Switch from Point to PointZ
How to add elevation to a point dataset in Python using geopandas, rasterio and rioxarray, exploring different methods to obtain Z values.
Geographic Information System
Processing ISTAT data and OGC of the National Geoportal - PART 2
Exploring problems in using National Geoportal WFS data: errors with Fiona, incompatibilities with OWSLib and workarounds to obtain correct data for GIS analysis.
Geographic Information System
Processing ISTAT data and OGC of the National Geoportal - PART 1
Analysis of ISTAT and OGC data: management of non-homogeneous encoding, correction of topological errors and fusion of census data with geometries to obtain reliable insights.
Geographic Information System
The areas at greatest risk of flooding in Italy
Analysis of the areas at greatest flood risk in Italy: 490,000 Lombard residents exposed. Maps, ISTAT data and GIS techniques to understand the problem.
Geographic Information System
Why do I offer online GIS courses?
Find out why I chose to offer online GIS courses and the challenges of managing an e-Learning platform. An analysis of the costs, difficulties and benefits for those seeking training in d
Geographic Information System
From Point to PointZ
Learn how to convert a 2D point vector to 3D using QGIS and GRASS GIS geoalgorithms. Step-by-step tutorial with practical examples and attached datasets.
Geographic Information System
Visibility analysis
Learn how to perform a visibility analysis with QGIS and GRASS GIS to evaluate the visual impact or visual accessibility of an area. Insights into the role of DEM and key parameters.
Geographic Information System
Calculation of the real surface: comparison between DTMs
Comparison between DTM ISPRA 20m/px and DTM LiDAR 1m/px to calculate the real surface of a flat area near Naples, highlighting the differences in precision.
Geographic Information System
Hydraulics&GIS: tank elevation and approach pipeline route
Learn how to use QGIS to design the optimal elevation of a reservoir and plot the route of an approach pipeline, combining raster data and GIS tools for efficient analysis.
Geographic Information System
GeoPackage: a Valid Alternative to the Shapefile Format!
Learn why GeoPackage is an ideal format for geographic data: open, OGC-compliant, topological, flexible, and capable of replacing the old shapefile.
Geographic Information System
Photovoltaics and GIS: how to identify the usability of a roof!
Find out how to use GIS to identify roofs suitable for installing photovoltaic systems. Analysis with DSM, slopes, exposure and calculation of potential in Kwp.
Geographic Information System
Remove duplicates from a vector
How to eliminate duplicates in a linear vector using SQL and the Topology Checker plugin in QGIS. A practical case with OSM and PostGIS hydrographic data.
Geographic Information System
Query: select part of a string excluding some characters
Learn how to select part of a string in QGIS using the substr operator, excluding certain characters, to filter data accurately and quickly.
Geographic Information System
Create a raster and a vector of the elevation bands
Learn to create a raster and elevation vector in QGIS using GRASS GIS. Step by step guide with a DEM, altimetric reclassification and conversion to polygons.
Geographic Information System
3D Open Source
Find out how to create a 3D reproduction of an area using only open source software like QGIS, without spending anything. Step by step guide using DEM, CTR and Qgis2threejs plugin.
Geographic Information System
Shapefile or cartographic DB: which to choose?
Comparison between shapefile and geodatabase (cartographic DB), exploring the differences, advantages and use cases to choose the best solution based on the amount of data and processing required
Geographic Information System
Vectors: A type of real-world representation in the GIS field
Introduction to the concept of vector in GIS, exploring the relationship between vector graphics, mathematical vectors and geometric primitives (points, lines, polygons) in GIS.
Geographic Information System
Study on the use of a cycling infrastructure with QGIS
Analysis on the use of the Naples cycle path with QGIS. Data from the European Cycling Challenge 2015, heatmap and study of cycling flows to answer the question: is the cycle path used?
Geographic Information System
Using Lidar files with QGis: article + tutorial
Learn how to use LiDAR files in QGIS, load .xyz data, and create 3D models, contour lines, and other raster processing. Practical exercise included!
Geographic Information System
How to georeference a raster that has no known points
Guide on how to georeference a raster without known points using GCP (Ground Control Points) in QGIS, with the help of georeferenced mapping of the area of interest.
Geographic Information System
How to import a DWG in QGIS
Learn how to import DWG files into QGIS by converting them to DXF using free tools like Draftsight. A simple guide to overcome format limitations and work efficiently in QGIS.
Geographic Information System
How to Import a Shapefile into Google Earth
Convert shapefiles to KML for viewing in Google Earth using QGIS. This guide simplifies the process, enabling seamless visualization of geospatial data in Google Earth.
Geographic Information System
What GIS are and how they are used?
GIS are powerful tools for decision-making, enabling the analysis and visualization of spatial data. This article explains their structure, applications, and role in various fields.
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