Geography

Search for "ArcGIS" then select Desktop or Pro and click on the map

Article from GIS Lounge describing various open source GIS and mapping applications including links to several of them.

GRASS GIS, commonly referred to as GRASS (Geographic Resources Analysis Support System), is a free and open source Geographic Information System (GIS) software suite used for geospatial data management and analysis, image processing, graphics and maps production, spatial modeling, and visualization. GRASS GIS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies. It is a founding member of the Open Source Geospatial Foundation (OSGeo).

This is intended to show how to perform basic GIS operations in QGIS in the most straightforward way. It is modelled after “How do I do that in ArcGIS/Manifold?: illustrating classic GIS tasks”. That document illustrated a selection of tasks which were thought to be representative of common usage in 2004, and was itself derived from a checklist of essential GIS functions that was included in 1988 in “A Process for Selecting Geographic Information Systems”.

QGIS is a user friendly Open Source Geographic Information System (GIS) licensed under the GNU General Public License. QGIS is an official project of the Open Source Geospatial Foundation (OSGeo). It runs on Linux, Unix, Mac OSX, Windows and Android and supports numerous vector, raster, and database formats and functionalities.

Online map creation resource.

Tools, resources, and advice for creating your own maps from ESRI.

Data.gov is primarily a federal open government data site. However, state, local, and tribal governments can also syndicate metadata describing their open data resources on Data.gov for greater discoverability. Data.gov does not host data directly, but rather aggregates metadata about open data resources in one centralized location.

The GIS Data Depot houses data in support of the GIS industry. The majority of the data provided has been downloaded by the GeoCommunity staff from a wide range of GIS Web sites located on the Internet.

This group provides access to data layers from the Esri Data and Maps DVD set that you can download for use with your ArcGIS software. Layer packages require ArcGIS 10.1 or more recent.

In 2009, USGS began the release of a new generation of topographic maps (US Topo) in electronic form, and is now complementing them with the release of high-resolution scans of more than 178,000 historical topographic maps of the United States. The topographic map remains an indispensable tool for everyday use in government, science, industry, land-use and management planning, history, and recreation.

The mission of the Humanitarian Information Unit (HIU) is to serve as a U.S. Government interagency center to identify, collect, analyze, and disseminate all-source information critical to U.S. Government decision-makers and partners in preparation for and response to humanitarian emergencies worldwide, and to promote innovative technologies and best practices for humanitarian information management.