qgis
Articoli correlati al tag qgis
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.
Online from
01 May 2018
Reading time
2 minutes
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.
Online from
09 March 2018
Reading time
3 minutes
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.
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.
Online from
17 January 2018
Reading time
4 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
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
Online from
11 January 2017
Reading time
2 minutes
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.
Online from
20 December 2016
Reading time
4 minutes