Modificare con QGis le geometrie di una mappa online con PostGIS e LeafletJS

Questa soluzione ci permette di aprire con QGis i dati cartografici pubblicati su una mappa web, pubblicata ad esempio con LeafletJS. Sto usando un sistema operativo Windows 10 e mediante il software PuTTY, creo un tunnel ssh alla porta 5432 di un server con PostGIS. La modifica dei dati quindi è possibile farla con il […]

Introducing CARTO SalesQuest: Location-Based Sales Analytics

We’ve talked a lot on this blog about how different business functions use Location Intelligence in very different ways to solve very different problems. This has led customers to ask us if we would ever build specific solutions for use cases. Today, with years of experience and thousands of customer applications deployed, we’re excited to […]

Movement data in GIS #9: trajectory data models

Movement data in GIS #9: trajectory data models There are multiple ways to model trajectory data. This post takes a closer look at the OGC® Moving Features Encoding Extension: Simple Comma Separated Values (CSV). This standard has been published in 2015 but I haven’t been able to find any reviews of the standard (in a GIS context […]

Introducing Voyager: The New CARTO Basemap

The basemap is the unsung hero of cartography. Regardless of the intended purpose, scale, or theme, the basemap must always provide the proper context, use a clear visual language, and effectively communicate the underlying data. For that reason, we’re constantly working to improve our basemaps and have decided to release a new version: Voyager. Designed by […]

Set Up a PostGIS Database With Docker

For GIS users who haven’t heard of PostGIS: PostGIS is a spatial database extender for PostgreSQL object-relational database. It adds support for geographic objects allowing location queries to be run in SQL. In this tutorial post we’ll cover how to install and run a PostGIS database on Windows using Docker, a popular containerization platform. We’ll then connect to the […]

New OSM routing plugin for QGIS OSM Tools

Two years ago I wrote the OSMroute plugin which enable the QGIS user to use the OpenRouteService API for geocoding of points, accessibility analysis as well as routing from A to B. Unfortunately the managing of a plugin/ open source tool is time-consuming/ hard. But fortunately Nils Rode lifted the plugin to a new level: OSM tools. […]

georeferencing images in QGIS using OSM data: how to distort the City

You probably already referenced maps with written coordinates but using photos or images is a little different as you need some characteristic points so you can control the position of the image according to the real world. In this little tutorial I’ll show you how to do a so-called image to image refernciation using Open […]