open source GIS

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

GIS 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

GIS 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.