Geographic Information System
H3: when hexagons help us read the territory better
H3 is a global geospatial index based on hexagonal cells. Let’s see how it works and why it can be useful in GIS and environmental analyses.
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The GIS Consultant's blog
Discover what mean "GIS"
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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".
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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.
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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.
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When you hear about GIS what do you think of?
A survey on LinkedIn explores what is associated with the word GIS. Analysis techniques, data, design tools and regulatory standards: what is your priority?
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The GIS approach
An article that debunks the myth of GIS as simple software, inviting us to consider the methodological approach and the importance of critical thinking in spatial analysis.
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From CAD to GIS. Convert polylines to polygons
When I convert CAD data into GIS format the first thing I do is a topological check. It is important because in this way I can identify the open polylines that I will certainly generate
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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
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Fix invalid geometries
Learn how to fix geometry with Self-intersection errors in PostGIS using functions like ST_MakeValid, ST_IsValid, and more. A practical guide to ensuring correct topologies in your GIS data.
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What is the Geoid for?
Find out what the geoid is, its relationship to the Earth's gravity and why it is essential for calculating elevations and representing the Earth's surface in GIS projects.
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What is an ellipsoid used for?
Learn about the importance of the ellipsoid in cartographic reference systems and how it approximates the shape of the Earth for accurate GIS representations.
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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.
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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.
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Square circumscribed to the polygon
Find out how to create a square bounding box for polygons using PostGIS, with practical examples on the Municipalities of the Metropolitan City of Naples.
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Subservice network: regulatory framework
The article reviews Italian and European rules for mapping underground utility networks, focusing on laws and directives that require municipalities to adopt information systems for their management.
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Geographic information falls within the UNINFO regulations
The UNI 11621-5:2018 standard defines 4 professional profiles in geographical information, integrating them with the AGID Guidelines for tenders and public procurement.
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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.
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What are map projections?
Introduction to cartographic projections, fundamental functions for representing the three-dimensional surface of the Earth on a plane. Discover the main types of projection and their characteristics
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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.
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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.
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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.
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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.
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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.
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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.
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Geomarketing
Every municipality should have a plan for commercial activities, but that is only one of the areas where geomarketing can be an indispensable GIS tool.
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Precision Agriculture
In recent years agriculture has seen a growing number of survey techniques in which GIS methods also play an important role.
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Urban Mobility
A GIS can also support urban mobility management because GIS are, above all, decision-support systems.
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Archaeology
Archaeology is one of the disciplines that benefits most from GIS tools. Here is an example of how GIS can support an archaeological survey.
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School Mobility
One of the fields where GIS tools are essential is sustainable mobility. Here is a practical example built around a school.
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Territorial Planning and Management
Territorial planning and management are unthinkable without GIS, yet CAD is still used too often even for planning tasks such as a municipal urban plan.
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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.
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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
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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.
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Territorial Promotion
Territorial promotion is another field where GIS can help, from interactive itineraries to web, print, and mobile experiences.
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Managing Public Green Spaces
Managing public green spaces, from maintenance to improvement planning, is one of the activities that can be organized effectively with GIS.
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Investigative Journalism
Can GIS support investigative journalism? Absolutely. Mapping events and evidence can reveal patterns that are hard to see otherwise.
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Underground Utility Networks
Underground utility networks are often poorly documented. This article explains why structured GIS-based records matter and which rules govern them.
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Outdoor Advertising Inventory
Surveying outdoor advertising assets helps road authorities monitor legality, revenue, and compliance, with GIS as a practical support tool.
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Public Lighting Inventory
A public lighting inventory helps map lighting assets, estimate energy use, and support efficiency strategies and smarter city management.
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The Road Sign Cadastre
This article explains why a road sign cadastre is useful and how GIS can support it within the Italian Highway Code framework.
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The Road Cadastre
Road authorities are required to establish and keep updated maps, a road cadastre, and related assets under the rules set by ministerial decree.
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A GIS for...
What are GIS for? Below is a list of activities where GIS are indispensable.
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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?
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LiDAR: perfectly reproduce the reality around us
Discover LiDAR technology for high-resolution topographic surveys. Applications in monitoring, census and urban development.
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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!
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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.
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How to turn a pdf into a raster
Guide on how to turn a PDF into a raster image using GIMP, with simple steps to get a good result without scanning.
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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.
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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.
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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.