Global Mapper is described as 'GIS Data processing application that offers access to a variety of spatial datasets and provides GIS functionality. Global Mapper is a must-have utility for anyone who deals with maps or spatial data'. There are more than 10 alternatives to Global Mapper for a variety of platforms, including Windows, Linux, Online / Web-based, Android and iPhone. The best alternative is QGIS, which is both free and Open Source. Other great apps like Global Mapper are GRASS GIS (Free, Open Source), ArcGIS (Paid), what3words (Free) and MapWindow GIS (Free, Open Source).
QGIS, formerly Quantum GIS, is a user friendly open source Geographic Information System (GIS) licensed under the GNU General Public License that runs on Linux, Unix, Mac OSX, and Windows and supports numerous vector, raster, and database formats and functionalities.
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Almost everyone thinks QGIS is a great alternative to Global Mapper.
GRASS GIS (Geographic Resources Analysis Support System) is an open source, free software (FOSS) Geographical Information System (GIS) with raster, topological, vector, image processing, and visualization functionality.
ArcGIS is geographic information system (GIS) software for visualizing, managing, creating, and analyzing geographic data. Using ArcGIS, you can understand the geographic context of your data, allowing you to see relationships and identify patterns in new ways.
MapWindow is a fully free and open source geographic information system project. It includes an open source programming component, MapWinGIS ActiveX, and an extensible desktop application that supports plug-ins written in .NET (C# and VB.NET).
gvSIG is a Geographic Information System (GIS), that is, a desktop application designed for capturing, storing, handling, analyzing and deploying any kind of referenced geographic information in order to solve complex management and planning problems.
Surfer is a full-function contouring, gridding, and 3D surface mapping software. It is used extensively for terrain modeling, bathymetric modeling, landscape visualization, surface analysis, contour mapping, and watershed mapping.
uDig is a GIS software program produced by a community led by Canadian-based consulting company Refractions Research. It is based on the Eclipse platform and features full layered open source GIS. It is written in Java and released under GNU Lesser General Public License.
Business mapping software (geographic information system) that delivers affordable, easy-to-use, professional mapping tools for mapping in these sectors: franchising, health care, business, territories, site selection, sales, marketing, banking, more.