GIS Data

Examples of topological errors in GIS that can occur during data creation/digitization. Image: Caitlin Dempsey

GIS Data: A Look at Accuracy, Precision, and Types of Errors

GIS Contributor

What are the types of error found in GIS data? This article reviews the difference between accuracy and precision and explains the most common types of error found in GIS data.

GDAL logo.

GDAL: Geospatial Data Abstraction Library

Mark Altaweel

The Geospatial Data Abstraction Library (GDAL) is a set of software tools used by GIS platforms such as ArcGIS, QGIS, and GRASS GIS.

Selected examples listed in this article illustrating why spatial data quality matters. Image: Joseph Kerski

Ten Reasons Why Spatial Data Quality Matters More Now Than Ever

Joseph Kerski

Geographer Josephy Kerski writes about 10 key reasons why geospatial data quality matters.

A black and white dot map showing ZIP codes in the continental United States.

Understanding and mapping ZIP Codes

Caitlin Dempsey

Resources for accessing ZIP code data. Ben Fry has created zipdecode that shows the location of all the ZIP codes in the United States.

World Bank GIS data catalog

World Bank and Geospatial Data

Mark Altaweel

The World Bank in August 2018 launched the Integrated Geospatial Information Framework, which is seen as a way for GIS data to be provided for governments, NGOs, and companies to make more informed decisions that not only benefit their economies but also enable sustainable development.