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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.

Version 2.x of QGIS (previously Quantum GIS)
818 questions
An extent is the minimum bounding box/rectangle (xmin, ymin and xmax, ymax) defined by coordinate pairs of a data source. All coordinates for the data source fall within this boundary.
809 questions
An application of QGIS used to develop models utilizing a large variety of powerful Geoprocessing tools via a GUI.
Normalized Difference Vegetation Index is used to quickly identify vegetation and its condition in remotely-sensed data.
A Styled Layer Descriptor (SLD) is an XML schema specified by the Open Geospatial Consortium (OGC) for describing the appearance of map layers.
The vertical distance of a point or object above or below a reference surface or datum (generally mean sea level).
772 questions
Python bindings for QGIS 3.
772 questions
GeoTools is an open source Java library that provides tools for geospatial data.
771 questions
Google's virtual globe application that allows users to view 3D buildings, imagery, terrain, any other information stored in KML files.
766 questions
A Geospatial Data Abstraction Library (GDAL) image mosaicing, reprojection, and warping utility.
Performance concerns how effectively a computing system uses resources.
754 questions
The process of sorting or arranging entities into groups or categories; on a map, the process of representing members of a group by the same symbol, usually defined in a legend.
738 questions
An extension to ArcGIS for Desktop and Server which adds functionality for analyzing networked data, particularly for road and transport networks.
731 questions
Questions related to GIS objects that have three dimensions.
719 questions
A series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey.
To show, hide, extract, or remove particular data from a larger set, narrowing it down, or the specific criteria used to do so.
706 questions
SpatiaLite is a spatial extension to SQLite, providing vector geodatabase functionality.
704 questions
NetCDF (Network Common Data Form) is a set of software libraries and self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.
700 questions
Version 2.7 of the Python programming language
694 questions
A command used to retrieve information from a database
692 questions
For questions about ArcGIS Python Parser for labelling expressions and field calculations
687 questions
Esri geodatabase is a database schema designed by ESRI for managing feature classes, versioning, topology, networks, terrains and other Esri application specific storage requirements.
682 questions
when asking questions about the R package sf (Simple Features for R)
675 questions
The field of study concerning statistical methods that use space and spatial relationships (such as distance, area, volume, length, height, orientation, centrality and/or other spatial characteristics…
671 questions
Remote sensing satellites with Multispectral imaging capabilities
662 questions
Questions about data from the Moderate-Resolution Imaging Spectroradiometer sensors aboard the Terra and Aqua satellites.
656 questions
when ArcGIS 9.3 is the version you are using from the ArcGIS platform.
648 questions
Layout refers to the appearance of a map as it is published, including not only the map view itself but any north arrows, legends, scale bars, map titles, neatlines, and so on. Questions should relate…
644 questions
To select data records according to logical criteria applied to their field values ("attributes")
643 questions
Ubuntu is a computer operating system based on the Debian Linux distribution and distributed as free and open source software, using its own desktop environment.
638 questions
SAGA (System for Automated Geoscientific Analyses) is a GIS toolbox with many modules that can be used from the GUI, command line or accessed through R,python or directly using C++.
634 questions
GeoPackage is an OGC format for vector, tiled and raster data, plus associated metadata, built on top of SQLite. It is described as the modern alternative to formats like SDTS and Shapefile.
Excel is a spreadsheet application from Microsoft with native *.xls and *.xlsx formats.
618 questions
Partitioning data points into subsets of objects according to their mutual "similarity," without using preexisting knowledge such as class labels.
609 questions
when ArcGIS 10.4 is the version you are using from the ArcGIS platform.
608 questions
A library for performing conversions between cartographic projections.
600 questions
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