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Categoria: tutorial

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

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,

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

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,

Quick reference guides for learning individual CARTO Builder features

Quick reference guides for learning individual CARTO Builder features.

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

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/

Dynamic styling expressions with aggregates & variables

In a recent post, we used aggregates for labeling purposes. This time, we will use them to create a dynamic data driven style, that is, a style that automatically adjusts to the minimum and maximum values of any numeric field … and that field will be

QGIS-Plugin: GeoSearch

m QGIS nach Adressen suchen, Distanzen oder Routen berechnen? Kein Problem mit dem QGIS-Plugin „GeoSearch“ von Walter Tsui. Genutzt werden die Daten aus dem Google Maps Service. Ich hab’s probiert, hier mal die Adress-Suche

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