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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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a cross-platform GIS application licensed under the GNU General Public License.
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when ArcGIS Desktop is the product and architecture that you are using from the ArcGIS platform.
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A site-package created by Esri to expose ArcGIS Desktop (ArcMap and ArcGIS Pro) geoprocessing, mapping, etc, to Python.
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an open source interpreted programming language used in many GIS programs.
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an extension for the PostgreSQL object-relational database that adds support for geographic objects.
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a data format consisting of regular grids of values, usually stored in an image-like format.
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A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions.
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the main application of ArcGIS for Desktop and the tag for that (arcgis-desktop) should normally be used in preference
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an open source software server written in Java that allows users to share and edit geospatial data.
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Python bindings for QGIS.
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A vector data storage format for storing the location, shape, and attributes of geographic features. Often referred to as 'an ESRI shapefile', as ESRI developed it.
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GDAL (Geospatial Data Abstraction Library) is an open source translator library & set of command-line utilities for processing raster spatial data formats. As a library, it presents a single abstract …
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when ArcGIS 10.0 is the version you are using from the ArcGIS platform.
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when you are using version 2.x of the OpenLayers JavaScript client toolkit.
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when ArcGIS 10.1 is the version you are using from the ArcGIS platform.
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Statistical computing language and software environment.
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when ArcGIS 10.2 is the version you are using from the ArcGIS platform.
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an open source object-relational database system.
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An Open-Source JavaScript Library for Mobile-Friendly Interactive Maps
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On a map, a closed shape defined by a connected sequence of x,y coordinate pairs, where the first and last coordinate pair are the same and all other pairs are unique.
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when ArcGIS for Server is the product you are using from the ArcGIS platform.
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a set of COM-based APIs from ESRI Inc. that are used in several of their products including ArcGIS Desktop, ArcGIS Engine and ArcGIS Server.
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a prototype-based, object-oriented scripting language that is dynamic, weakly typed and has first-class functions.
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using of the OpenLayers JavaScript client toolkit is 3 or later
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a collaborative project to create a free editable map of the world. The data is free, and free of legal and technical restrictions. OpenStreetMap is often shortened to OSM.
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Software plugins that add functionality to the QGIS package
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For questions about ArcGIS API for JavaScript 2.x and 3.x. For 4.x use arcgis-javascript-api-4 instead
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An application of ArcGIS Pro and also of ArcGIS Desktop 10.x that is used to create, edit and manage models within its Geoprocessing Framework
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when ArcGIS 10.3 is the version you are using from the ArcGIS platform.
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GRASS GIS (Geographic Resources Analysis Support System) is a free, open source geographical information system (GIS) specialized in handling raster, topological vector, image processing, and graphic …
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a geospatial data interchange format based on JavaScript Object Notation (JSON)
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a standard protocol for serving georeferenced map images over the Internet
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Use for questions about Field Calculators of QGIS, ArcGIS Desktop, etc and their Calculate Field tools
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Questions seeking data (except commercial) recommendations are usually better asked at the Open Data Stack Exchange
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Rendering values from attribute tables as text on maps near their feature. For questions about legend labels use the [legend] tag instead.
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a collection of information. It contains specific elements of a gis in a specific presentation method (e.g raster or vector layer). Layers can be edited separately in order to create indivi…