Understanding Map Scale
Map scale refers to the ratio between the distance on a map and the corresponding distance on the Earth’s surface.
Map scale refers to the ratio between the distance on a map and the corresponding distance on the Earth’s surface.
This article reviews some of terminology and types of elevation based datasets available to GIS.
This GIS 101 page is the launch page for accessing information about GIS and geospatial technologies on GIS Lounge.
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.
This article discussions different types of GIS data in both vector and raster formats.
The Geospatial Data Abstraction Library (GDAL) is a set of software tools used by GIS platforms such as ArcGIS, QGIS, and GRASS GIS.
Resources for accessing ZIP code data. Ben Fry has created zipdecode that shows the location of all the ZIP codes in the United States.
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.
An open access book focusing on the use of GIS in sustainable urban planning and management includes six chapters containing exercises and GIS data.
GIS data info, exploring geographic data types (vector/raster), data errors, metadata, and online GIS data sources.
Free data viewers for a variety of GIS data formats. These viewers allow you to display geographic data as well as perform some basic GIS functions.
Listed here are some of the more common file formats along with associated file extension for GIS file types.