open source GIS

A group of people watching a presentation with a map on a screen.

5 Ways GIS Users Can Expand Their Geospatial Skills

Caitlin Dempsey

Listed here are five practical strategies that GIS users can adopt to further develop their geospatial capabilities.

What is PostGIS?

Mark Altaweel

PostGIS is an Open Geospatial Consortium (OGC)-compliant software that serves as an extension for PostgreSQL, an object-relational database.

Growth of GIS job listings with the term open source.

Five Reasons to Start Using QGIS

Caitlin Dempsey

Here are five compelling reasons to start using the open-source GIS platform QGIS, a free and open source software.

Free Ways to Learn QGIS

Caitlin Dempsey

If you want to start learning how to use QGIS, a free and open source GIS software package, there are some excellent free resources out there. 

Laptop with QGIS, a desktop GIS software program

Learn GIS for Free

Caitlin Dempsey

There are a few online options to learn GIS for free. Take advantage of resources that provide you access to free courses from some of the world's best universities and institutions.

Open Source GIS and Freeware GIS Applications

Caitlin Dempsey

There are many open source GIS and web mapping applications to choose from.

A detailed map showing a shaded relief area and a popup with attribute data about a fly fishing shop.

Using GIS to Map Fly Fishing Destinations

Geo Contributor

William Bakemeyer describes how he used QGIS and open source data to create a fly fishing map.

Two images - one from 2013 and one from 2021 showing changes in orange in the coastline of an area.

QGIS from a Graduate Student’s Perspective

Geo Contributor

Kent Campbell writes about how he has come to view the benefits of using QGIS as a graduate student.

An example of map vandalism where this area of farmland was given a network of non-existent roadwork by a user. Example from OpenStreetMap, CC BY-SA 2.0

Efforts to Combat Map Vandalism in OpenStreetMap Data

Mark Altaweel

Map vandalism is the deliberate wrong change or update to map data, such as adding an incorrect name for a street or place.

Diagram showing WebGIS architecture. Adapted from Emmanuel Jolaiya.

WebGIS Section 3: Architecture

Emmanuel Jolaiya

Emmanuel Jolaiya explains the architectural workflow of a WebGIS.

The OpenLayers site hosts many examples of the library in use. Screenshot from OpenLayers showing calculated shaded relief from elevation data.

Openlayers: Geospatial JavaScript Library

Mark Altaweel

One of the most under-utilized programming languages in geospatial analysis and processing is JavaScript.

Logos of open source GIS and WebGIS tools.

Businesses Using Open Source GIS

Mark Altaweel

Businesses are using open source GIS software, finding that there are a lot of benefits along the way.

Screenshot from GRASS showing part of the user interface. Source: grass.osgeo.org

Why GRASS Delivers Powerful GIS Capabilities

Mark Altaweel

A recent MapScaping podcast with Markus Neteler, chairman on the GRASS GIS Project Steering Committee, makes it is clear that GRASS will continue to be a powerful GIS open source effort for years to come.

Series: WebGIS Using Open Source Tools

Emmanuel Jolaiya

Emmanuel Jolaiya's series on WebGIS using open source geospatial tools and technologies.

Self-Guided QGIS Courses

Caitlin Dempsey

These six QGIS courses are available for free self-guided learning.

H3, developed by Uber, divides the Earth into hexagons. Image: Uber.

H3: Open Source Geospatial Indexing System

Mark Altaweel

H3, developed by Uber, divides the Earth into hexagons.

QGIS is a very popular popular open source GIS software.

QGIS and Free Mobile Applications

Mark Altaweel

The capabilities of QGIS can be extended with plugins and mobile GIS apps.

EarthPy: Python Package for Plotting and Working with Spatial Data

Mark Altaweel

A Python language spatial package, called EarthPy, has been released for free download for working with GIS data.

Portable GIS

Caitlin Dempsey

Portable GIS is a collection of open source GIS software applications and tools that can be run from a portable drive.

Platforms for Making Deep Learning Easier for GIS

Mark Altaweel

New tools have been developed to facilitate the integration of deep learning tools within GIS applications.

How to Change the Projection of a Shapefile Using QGIS

Caitlin Dempsey

If you know your shapefile's beginning coordinate system or projection, you can export the data using QGIS.

A Case Study on Converting a Geodatabase From ArcGIS for Use in QGIS

Geo Contributor

In this article Charles Altendorf outlines a method he developed to convert GIS data located in a geodatabase created in ArcGIS into open source data that can be used in QGIS.

Using GIS to Analyze Pedestrian Accessibility

Mark Altaweel

GIS tools to compute pedestrian accessibility are not just available to governments, academics, or companies, but are also free and open source.

Free Urban Planning GIS Book and Exercises

Caitlin Dempsey

An open access book focusing on the use of GIS in sustainable urban planning and management includes six chapters containing exercises and GIS data.

QGIS Map Design, 2nd Edition

Caitlin Dempsey

Updated to be used with QGIS 3.4, the second edition of QGIS Map Design is now available in its final version.

How to Get the Map View in QGIS to Resize Properly on a Mac

Caitlin Dempsey

One Mac OS specific bug is the map view canvas doesn't fill the available space in QGIS 3.x versions. Learn how to fix this.

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