GIS Data

This category contains introductory text about GIS data such as types of error in GIS datasets, types of GIS data (raster and vector), and metadata. Find resources to finding GIS data and where to download data.

GIS Data

When a line feature cross back over itself without a node at the intersection of the two lines, the result is a weird polygon.

What are Weird Polygons?

April 26, 2018By Caitlin DempseyGIS Data

The straightforward definition of a weird polygon is a GIS data feature that is missing nodes.

Using Machine Learning to Speed Up Electrical Grid Mapping

April 22, 2018By Caitlin DempseyGIS Data

Development Seed, working for the World Bank Group, created a methodology for integrating machine learning with manual mapping in order to speed up the mapping of high-voltage (HV) grids in developing countries.

Antarctica GIS Resources

April 20, 2018By Caitlin DempseyGIS Data

Find resources relating to GIS including case studies, articles and access to data relating to Antarctica.

Where to Find GIS Data for Historical Country Boundaries

April 17, 2018By Caitlin DempseyGIS Data

Finding historical GIS data can be hard to find. Listed here are available sites that offer historical country data in GIS file formats for download.

Over 2000 Sentinel-1 Satellite Images Were Used to Create a Map of Land Deformation in the United Kingdom

April 11, 2018By Caitlin DempseyGIS Data

A new map of the United Kingdom map tracks areas of land subsidence and uplift based on processed data from Sentinel-1’s Synthetic Aperture Radar (SAR)

Access 6 Years of Sea Surface Salinity Maps and Data for the North Atlantic Ocean and the Mediterranean Sea

April 11, 2018By Caitlin DempseyGIS Data

The SMOS Barcelona Expert Center recently released products available for downloading relating to Sea Surface Salinity.

Mapping Minerals with Satellite Imagery

April 11, 2018By Mark AltaweelGIS Data

Mapping minerals with remote sensing was one of the main motivating reasons for creating the earliest multispectral satellite systems.

This New Tool from Sentinel Hub Lets You Create Time-lapse GIFs from Satellite Imagery

April 6, 2018By Caitlin DempseyGIS Data

The latest upgrade of the EO Browser includes the ability to create an animated GIF from a time series of satellite images. This short tutorial shows you how to create your own time-lapse GIF.

The Use of Drones in Human and Physical Geography

March 20, 2018By Mark AltaweelGIS Data

With the widespread use of drones, methods are likely to be further refined to improve not only the use of UAVs in physical measurements in geography but even expanded to areas of the social sciences.

GIS, Data Preservation, and Gentrification

March 19, 2018By Olivia HarneGIS Data

Olivia Harne discusses how smart planning that incorporates GIS needs to take into account the historic identity of gentrifying neighborhoods.

Creating Ground-level Views from Satellite Imagery

Recreating a ground-level image and perspective using satellite imagery has only recently been developed.

A New Global Peatland Map Expected for 2020

A new global high-resolution peatland map is expected for 2020.

Elements of a Map

Maps are the primary tools by which spatial relationships are visualized. Maps therefore become important documents. There are several key elements that should be included each time a map is created in order to aid the viewer in understanding the communications of that map and to document the source of […]

Learn GIS for Free

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.