cartographic techniques

Laptop with QGIS, a desktop GIS software program

GIS 101: Learn About GIS

Caitlin Dempsey

This GIS 101 page is the launch page for accessing information about GIS and geospatial technologies on GIS Lounge.

Visualizing Climate Change With Maps

Mark Altaweel

The choice of labeling and color can have a pronounced influence in shaping opinions when visualizing climate change on maps.

The easiest way to show spatial change over time: side by side maps each showing a slice of time.

Time and GIS: Ways of Representing Time on a Map

Caitlin Dempsey

Spatialtemporal visualization are ways to illustrate changes in an area over time on a map. The famous geographer Immanuel Kant maintained that geography was the study of knowledge in a location, while history was the study of knowledge in time. This article explores different cartographic methods of showing changes in time over space on a map.

Noncontiguous cartogram showing population density within Europe. (Source: Vinny Burgoo). Projection: Lambert Azimuthal Equal Area. Data: January 2008 population data from Eurostat.

Area Cartogram Maps Explored

Caitlin Dempsey

Area cartogram maps are maps of non-absolute space where the areal extent is in proportion to some measured value.  Cartogram ...