tutorials
Articoli correlati al tag tutorials
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".
Online from
03 September 2023
Reading time
4 minutes
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.
Online from
13 June 2020
Reading time
3 minutes
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.
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.
Online from
30 April 2019
Reading time
2 minutes
Personal manifesto on Sharing Knowledge
Sharing knowledge is not a loss of competitive advantage, but an opportunity to grow and create value. A personal manifesto on the importance of Sharing Knowledge.
Online from
30 March 2018
Reading time
2 minutes
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.
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.
Online from
23 June 2017
Reading time
2 minutes
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.
Online from
26 May 2017
Reading time
1 minute
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.
Online from
18 March 2017
Reading time
2 minutes
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!
Online from
21 August 2015
Reading time
4 minutes