(Geographic Resources Analysis Support System)
GIS Freeware, con licenza GNU (General Public License).
Uno dei Gis di riferimento al mondo, nato inizialmente in America per scopi militari, è attualmente utilizzato in particolar modo in ambienti governativi, commerciali e accademici.
E' nato sotto sistemi GNU/Linux, ma ne è stato fatto il porting anche in Windows. Attualmente è in fase di sviluppo una versione nativa per Windows.
Commonly referred to as GRASS, this is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies. GRASS is official project of the Open Source Geospatial Foundation.
Over the past decade Geographical Information Systems (GIS) have evolved from a highly specialized niche to a technology that affects nearly every aspect of our lives, from finding driving directions to managing natural disasters.
GRASS GIS is a general purpose raster/vector GIS combined with integrated image processing and data visualization subsystems. It includes a large number of modules for management, processing, analysis and visualization of georeferenced data.
Unlike most proprietary GIS, GRASS provides complete access to its internal structure and algorithms. Advanced users who want to write their own GIS modules may therefore learn from existing modules as well as by reading the "GRASS Programmer's Manual''. The documented GRASS GIS libraries with the Application Programming Interface (API) make the new module development more efficient and allow to integrate new functionality into GRASS. Applications can be also written with shell scripts to automate the GIS workflow.
Gis multipiattaforma (Linux, Unix, Mac OSX, e Windows) con licenza Open Source.
E' di facile utilizzo rispetto a tanti Gis commerciali, oltre che più leggero e con una interfaccia grafica intuitiva, anche se non presenta le estese funzioni di certi software.
Può però essere installato un supporto per GRASS e con questo utilizzare i tools di GRASS stesso.
QGIS is a cross-platform (Linux, Windows, Mac) opensource application with many common GIS features and functions. The major features include:
view and overlay vector and raster data in different formats and projections without conversion to an internal or common format. Supported formats include:
spatially-enabled PostgreSQL tables using PostGIS,
Gis molto ridotto, ma leggero ed efficiente.
Unico difetto è che lo sviluppo è fermo al 2005.
Traducibile anche in italiano.
Developed by the Wisconsin DNR using the TatukGIS Developer Kernel, this was released publicly and updated through 2005, when changes in the license made public distribution impossible without royalty payments. Too bad - even two years later, it’s a decent freeware GIS, and certainly would have been a lot better by now.
Open and view geo-referenced raster images including digital orthophotos and topographic maps in MrSID®, ECW, BIL, ADF, JPG, TIFF, GeoTIFF, BMP, IMG, JPEG2000, PNG and SDTS file formats.
Open and view vector data in ESRI® shapefile (SHP) and e00 files, AutoCAD DXF™, MapInfo® MIF, Microstation® DGN, DLG-O, TIGER2000/line, GML/XML, SDTS and TatukGIS SQL (ttkls) file formats. An advanced R-Tree index system allows easy viewing of large (100+ MB) data files.
Create and edit point, line and area shapefile objects and their associated data attribute tables. fGIS also edits and writes MIF, DXF, DLG & GML vector layers.
Buffer point, line or area objects at any designated radius or width.
Generate Cruise Points. Select an area object and fill it with either a random or ordered grid.
Design maps with pre-defined layer symbology, or use advanced layer properties to define your own.
Copy and paste shapefile objects from one layer to another.
Designate the direction and distance of the next leg of a line or polygon with the COGO-like Traverse Tool. Directions can be entered in decimal degrees or degrees-minutes-seconds (handy for plotting deeds or laying out a field data collection route).
Split a polygon or line (including GPS tracks) into separate units by drawing a line with the Split Shapes Tool.
Clip Shapefiles to the boundaries of a polygon layer.
Merge multiple shapefiles into a new one.
Customize map properties including line width and color, area fills, label fonts and positions, image transparency, thematic rendering of data and more.
Measure areas and distances. fGIS reports distances and areas in English units (feet, miles and acres) and metric units. Area and perimeter measurement fields can be added to data tables and updated automatically.
Display data at user-specified scales.
View maps in 3D.
Map live GPS positions from any connected GPS unit with NMEA output (beta).
Extract geo-referenced images of selected portions of a screen display.
Export part of a vector layer and save it as a new file.
Manage large data sets organized in dBase tables with the “Load Library Layer” utility.
Join dBase and Access tables to shapefile attribute tables.
Create point shapefiles from comma delimited text files with x|y coordinates.
Convert Geographic WGS84 coordinate shapefiles to and from worldwide UTM zones and Wisconsin Transverse Mercator.
Print the map with three flexible output options. The Simple Print command will add a map title, subtitle, footer and the scale to the page. The Send Map to Word command will send an image of the view at a user specified resolution and scale to Microsoft® Word. A third option through the Export Image tool will send the map to a technical illustration/page layout module called Diagram Designer. You can add headers, legends, annotations and non-spatial symbols from template palettes in the Diagram Designer module.
Software di origine spagnola, tradotto anche in italiano, caratterizzato da una semplice interfaccia.
gvSIG is a tool oriented to manage geographic information. It is characterized by a user-friendly interface, with a quick access to the most usual raster and vector formats. In the same view it includes local as well as remote data through a WMS, WCS or WFS source.
It is aimed at users of geographic information, whether professionals or civil servants (city councils, councils, regional councils or ministries) from any part of the world ( at the moment its interface is in Spanish, Valencian, English, Basque, Gallego, Czech, Chinese, French, German, Italian, Romanian, Polish and Portuguese), in addition to being free.
Given its Free Software nature (open source) it is highly interesting for the international community of developers and, in particular, for university settings due to its R&D&I component. In fact, special emphasis has been placed on the expansion of the project so that potential developers can easily expand the functions of the application, as well as develop completely new applications from the libraries used in gvSIG (as long as they comply with the GPL license).
uDig is an open source desktop GIS development platform. It is also a working open source desktop GIS application.
uDig is an open source (LGPL) desktop application framework, built with Eclipse Rich Client (RCP) technology.
uDig can be used as a stand-alone application.
uDig can be extended with RCP “plug-ins”.
uDig can be used as a plug-in in an existing RCP application
uDig is built to be an "internet GIS", a system which can interact with data across potentially slow and/or unreliable networks using open and de facto standards, such as OpenGIS and ESRI standards.
The "internet GIS" philosophy means that we treat all map layers the same way, and try to provide the same capabilities for all layers, whether local or remote:
All layers can be reprojected into arbitrary coordinate systems.
All layers can be queried with the same tool.
All read/write layers can be edited with the same tools.
All layers are re-orderable, can be made semi-transparent, and can be turned off and on separately – layers received from the same server are not bound together into a monolithic layer stack.
All data sources are managed in the same catalogue.
All data sources are searched through the same interface.
Keeping layer interactions the same between data sources simplifies use understanding of the application – whether data is a local shape file, nearby database, or remote Web Feature Server, the same tools and operations apply. Data Sources
Map Maker Gratis is a powerful introduction to the world of GIS. Unlike other free viewers, Gratis is a fully functional map production program with GIS functions such as thematic mapping and data interrogation. The program can be used both with vector and raster data and produces high quality, accurately scaled print outs.
Good looking maps
Unlimited number of layers, raster and vector.
Colour, mono, and grey-scale bitmap backgrounds.
Large range of fill, line, and symbol styles
Translucent and semi-translucent fills.
Curved, stretched, and outline text.
Arrows, and dimensions.
Easy to create scale bars, north points, legends, text panels, inset images, etc.
Point-and-click to pop-up images, documents and internet links.
Print accurately scaled maps on any true Windows compatible printer.
Multi-sheet printing of large maps.
Map Creation & Editing
Create from new or import and edit.
Vector drawing and editing.
Intuitive cutting and joining of polygons.
Create polygons with islands.
Simple editing of common boundaries.
Numerous "snap-to" options.
Drag, stretch, rotate, duplicate groups of objects.
Create buffer zones.
Calibrate raster images.
Using data with maps
Use data from DBF files to colour up a map or determine symbols.
Measuring areas and lengths is simple.
Edit data sets.
Import vector data including ArcView SHP, MapInfo MIF, AutoCAD DXF, Idrisi VXP.
View BMP, TIF, Geo-Tiff, and JPG raster data.
Export BMP, JPG, TIF.
Export DBF data to Microsoft Access, Excel, dBase etc.
Software Gis che viene utilizzato soprattutto per l'analisi di dati sulle biodiversità. Basato sulla piattaforma gis uDig.
DIVA-GIS can be used to map and analyze biological distribution data, such as can be provided by natural history collections and genetic resources collections. Typically, the distribution data would refer to locations where different species, phenotypes or genotypes have been observed, and perhaps collected.
These data can be analyzed to identify areas of high diversity; to predict the chance of finding a species in areas that have not been explored; to study the distribution of certain traits of interest; and to select and design of sites for in situ conservation.
Spatial analysis with DIVA-GIS can also be used to identify geographic areas of interest, for example those are:
Likely to contain habitats of interest;
Highly diverse (e.g. environmentally, taxonomically, or genetically);
Complementary (e.g. areas rich in biodiversity but with relatively few common taxa);
Currently under-represented in conservation efforts;
Threatened with genetic erosion;
Likely to be suitable as in situ conservation sites;
SAGA – (System for Automated Geoscientific Analyses)
Gis particolare. E' orientato all'analisi e gestione di dati geoscientifici.
Ha una interfaccia user friendly ed è fornito di un'ambiente di programmazione.
SAGA – System for Automated Geoscientific Analyses- is a hybrid GIS software. The first objective of SAGA is to give (geo-)scientists an effective but easy learnable platform for the implementation of geoscientific methods, which is achieved by SAGA's unique Application Programming Interface (API). The second is to make these methods accessible in a user friendly way. This is mainly done by the Graphical User Interface (GUI). Together this results in SAGA's true strength: a fast growing set of geoscientifc methods, bundled in exchangeable Module Libraries.The figure shows SAGA's system architecture. Standard Modules:
Currently there are about 120 modules available in SAGA's standard edition. This list gives an overview of the variety of implemented methods.
- File access: interfaces to various table, vector, image and grid file formats.
- Filter for grids: gaussian, laplacian, multi direction lee filter...
- Gridding: interpolation from vector data using triangulation, nearest neighbour, inverse distance...
- Geostatistics: residual analysis, ordinary and universal kriging, single and multiple regression analysis, variance analysis...
- Grid calculator: combine grids through user defined functions...
- Grid discretisation: skeletonisation, segmentation...
- Grid tools: merging, resampling, gaps filling...
- Image classification:cluster analysis, box classification, maximum likelihood, pattern recognition, region growing...
- Projections:various coordinate transformations for vector and grid data (using Proj4 and GeoTrans libraries), georeferencing of grids.
- Simulation of dynamic processes: TOPMODEL, nitrogen distributions, erosion, landscape development...
- Terrain analysis:slope, aspect, curvatures, curvature classification, analytical hillshading, sink eliminition, flow path analysis, catchment delineation, solar radiation, channel lines, relative altitudes...
- Vector tools: polygon intersection, contour lines from grid...
- And more... Application Programming Interface:
The heart of SAGA is its application programming interface. It is compiled as a shared library and provides the module programmer with a comprehensive set of functions and object classes.
- Geometrical (points, intersections...), numerical (matrix operations..) and other tools (memory, strings...)
- The data object classes for tables, vector and gridded data are responsible for memory handling and data access and provide various data type specific methods.
- Interaction with the GUI like progressbar notification and other message handling
- Module related definitions include classes for the construction of parameter lists, basic functionality for all derived module classes and the SAGA module library interface definition
Gis semplice, open source e programmabile, con possibilità di diverse estensioni tramite dei plug-ins dedicati.
The MapWindow application is a free, extensible geographic information system (GIS) that can be used in many ways:
- As an open-source alternative desktop GIS
- To distribute data to others
- To develop and distribute custom spatial data analysis tools
This User Guide is only intended for use with the MapWindow Desktop GIS Application.
As an open-source tool, MapWindow is free to use and redistribute to the user clients and other end users. It may also be modified to fit the user needs, or embedded into proprietary software.
MapWindow is more than just a data viewer. It is an extensible geographic information system.
This means that advanced users or developers can write plug-ins to add additional functionality (models, special viewers, hot-link handlers, data editors, etc) and pass these along to any number of the users clients and end users.
MapWindow includes standard GIS data visualization features as well as DBF attribute table editing, shapefile editing, and data converters. Dozens of standard GIS formats are supported, including Shapefiles, GeoTIFF, ESRI ArcInfo ASCII and binary grids.
Getting the Software:
The MapWindow GIS software is freely available to download from the MapWindow website.
In addition, there are further Plug Ins to add capability to the base software for download from the site.
MapWindow GIS software installer will provide a range of the key plug-ins required for use, including GIS Tools, Shapefile Editor plus others. There are additional plug-ins available from the MapWindow website downloads page, or from links in the Sample Code Forum. New plug-ins are constantly being developed, so it is advised to check the website.