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Updated listing of free GIS mapping software. Download free GIS software and free GIS shapefiles to create your own GIS maps.
NRDB (Natural Resources Database) is a free database and mapping application for developing and distributing environmental databases. Its aim is to provide people in developing countries with a powerful yet simple tool to assist in the managing of their own resources.
OGR Simple Features Library is a C++ open source library (and commandline tools) providing read (and sometimes write) access to a variety of vector file formats including ESRI Shapefiles, and Mapinfo mid/mif and TAB formats.
OpenDMTP, is a protocol and framework that allows bi-directional data communications between servers and devices (clients) over the Internet and similar networks. OpenDMTP is particularly geared towards Location-based information (LBS) such as GPS, as well as temperature and other data collected in remote-monitoring devices.
OpenEV is a software library and application for viewing and analysing raster and vector geospatial data. OpenEV is used by private companies, universities, governments and non-profit organizations around the world.
OpenGTS - The "Open GPS Tracking System" is the first available open source project designed specifically to provide web-based GPS tracking services for a "fleet" of vehicles.
OpenLayers is a pure JavaScript library for displaying map data in most modern web browsers, with no server-side dependencies. OpenLayers implements a (still-developing) JavaScript API for building rich web-based geographic applications, similar to the Google Maps and MSN Virtual Earth APIs, with one important difference -- OpenLayers is Free Software, developed for and by the Open Source software community.
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Orbit EOS Lite Free GIS Map Server - EOS is the scalable, extenable Orbit Server system, used for corporate and internet GIS data sharing. EOS supports most popular data formats, and can be extended with functionalities such as geoprocessing or gis-data related database access and transaction control.
Orbit Explorer GIS Freeware - Orbit Geospatial Technologies presents Orbit Explorer Freeware 4.4 for Windows 32 and 64bit, 4.1 for Linux and Unix 32 and 64bit, and 4.3 for Mac OSX systems on G4, G5 and Intel Dual Core machines. The Orbit Explorer Desktop solution now comes with full OGC WMS supportover 50 new and improved functionalities.
PostGIS adds support for geographic objects to the PostgreSQL object-relational database. In effect, PostGIS "spatially enables" the PostgreSQL server, allowing it to be used as a backend spatial database for geographic information systems (GIS), much like ESRI's SDE or Oracle's Spatial extension. PostGIS follows the OpenGIS "Simple Features Specification for SQL" and has been certified as compliant with the "Types and Functions" profile.
Practical Map Server (PMS) is a geospatial software package that delivers
geographic content to web browsers and other compatible clients. PMS is written in Java. One source archive is temporarily available from the FreeGIS ftp
Server.
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