Skip to main content

GIS Terminology 2





1. Geoid: A model representing the Earth's irregular shape due to variations in gravity and density, used as a reference surface for measuring elevations.

2. Geocoding: The process of converting an address or location description into geographic coordinates (latitude and longitude).

3. Geofencing: Defining virtual boundaries around a location to trigger actions or alerts when someone or something enters or exits the designated area.

4. Georeferencing: The process of aligning an image or map to a known coordinate system to establish its spatial reference.

5. Geoportal: A web-based platform that provides access to geospatial data, maps, and services from various sources.

6. Geoprocessing: A set of operations and tools used to manipulate and analyze geographic data in a GIS.

7. Geospatial Analysis: The process of examining geographic patterns, relationships, and trends within spatial data.

8. Global Navigation Satellite System (GNSS): A network of satellites that provide positioning, navigation, and timing services, including GPS.

9. GPS Accuracy: The degree of closeness between the measured GPS location and the actual location on the Earth's surface.

10. GPS Surveying: The use of GPS technology for precise positioning and data collection during surveying tasks.

11. Ground Truthing: Verifying and validating remotely sensed data using on-the-ground observations or field surveys.

12. Heatmap: A visual representation of data density, where colors indicate the intensity or frequency of occurrences in a geographic area.

13. Hyperspectral Imaging: Remote sensing technique that collects and analyzes detailed information from hundreds of narrow spectral bands.

14. Interpolation: A process of estimating values at unmeasured locations based on values at known locations.

15. Join: Merging data from two or more tables based on a common attribute field.

16. KML (Keyhole Markup Language): A file format used to display geographic data in applications like Google Earth.

17. Land Cover Classification: Categorizing the Earth's surface into different classes based on its physical and biological characteristics.

18. Latitude: Angular distance north or south of the equator, measured in degrees.

19. Lidar (Light Detection and Ranging): Remote sensing technology that uses laser pulses to measure distances and create 3D representations of the Earth's surface.

20. Line of Sight: A direct, unobstructed path between two points that can be used for visibility analysis.

21. Location-Based Services (LBS): Services that utilize location information to provide content or functionality to users based on their geographic position.

22. Longitude: Angular distance east or west of the prime meridian, measured in degrees.

23. Map Projection: A method used to represent the curved surface of the Earth on a flat map.

24. Map Scale: The ratio of distance on a map to the corresponding distance on the Earth's surface.

25. Multi-Criteria Decision Analysis (MCDA): A technique for evaluating multiple criteria to make decisions in GIS.

26. Near-Infrared (NIR): Electromagnetic spectrum region used in remote sensing for vegetation analysis and other applications.

27. Node: A point where two or more lines intersect in a network dataset.

28. Normalization: Scaling data to a common range, usually between 0 and 1, to remove bias during analysis.

29. Oblique Imagery: Aerial or satellite imagery taken at an angle, providing a different perspective from vertical imagery.

30. Orthophoto: An aerial photograph or satellite image that has been corrected for distortion and terrain relief.

31. Parcel Data: Information about individual land parcels, often used for property management and land administration.

32. Participatory GIS (PGIS): Involving local communities in the collection and analysis of geographic data to support decision-making.

33. Photogrammetry: The science of making measurements from photographs or images, often used for creating 3D models.

34. Point Data: Geospatial data represented as discrete, individual points with specific coordinates.

35. Polygon: A closed geometric shape with three or more sides, often used to represent areas on a map.

36. Proximity Analysis: Assessing relationships and distances between geographic features.

37. QuickBird: A commercial high-resolution satellite used for remote sensing applications.

38. Radiometric Resolution: The ability of a remote sensing sensor to distinguish variations in the electromagnetic radiation received from the Earth's surface.

39. Rectification: The process of aligning and transforming an image to remove geometric distortion.

40. Regression Analysis: A statistical technique used in GIS to identify relationships between variables.

41. Remote Sensing Platforms: Satellites, aircraft, or drones used to collect remote sensing data.

42. Resampling: Changing the resolution of raster data to match the desired output.

43. Reverse Geocoding: The process of converting geographic coordinates into human-readable addresses.

44. Routing: Finding the optimal path between two or more locations based on a network dataset.

45. Satellite Imagery: Images captured by satellites from space, used for various applications, such as environmental monitoring and land use analysis.

46. Sensor Fusion: Combining data from multiple sensors or sources to improve data quality and accuracy.

47. Spatial Autocorrelation: A statistical measure that evaluates the degree of spatial clustering or dispersion of data.

48. Spatial Data Infrastructure (SDI): The organizational, institutional, and technological framework for accessing and sharing spatial data.

49. Spatial Data Model: A conceptual representation of how geographic data is organized and structured in a GIS.

50. Spatial Join: A GIS operation that combines attributes from two spatially related datasets based on their spatial location.

51. Spatial Indexing: A technique used to speed up data retrieval and analysis in GIS by optimizing spatial queries.

52. Spatial Interpolation: The process of estimating values at unmeasured locations based on values at nearby measured locations.

53. Spatial Metadata: Information about the characteristics and source of spatial data.

54. Spatial Query: A method of retrieving data from a GIS based on spatial relationships or criteria.

55. Spatial Reference: A set of coordinates used to define the location of features in a GIS.

56. Spatial Resolution: The level of detail represented in a raster or image, typically measured in meters or feet.

57. Spatial-Temporal Analysis: Analyzing geographic data over time to identify patterns and trends.

58. Spectral Bands: Specific ranges of wavelengths in the electromagnetic spectrum used in remote sensing.

59. Spectral Signature: The unique reflectance or emittance pattern of a surface in the electromagnetic spectrum, used for land cover classification.

60. Standardization: The process of converting data to a consistent format or coordinate system for analysis.

61. Stream Network Analysis: Analyzing the flow of water in a river network using hydrologic tools.

62. Symbolization: Representing geographic data using various symbols, colors, and patterns on a map.

63. TIGER/Line: A dataset produced by the United States Census Bureau, providing detailed geographic data for mapping and analysis.

64. Tile-Based Rendering: A method used to display large-scale maps by dividing them into smaller tiles for efficient loading and rendering.

65. Time Series Analysis: Analyzing changes and patterns in geographic data over time.

66. Topographic Map: A detailed map representing natural and man-made features on the Earth's surface.

67. Topology: The spatial relationships and connectivity between geographic features.

68. UTM (Universal Transverse Mercator): A widely used map projection system that divides the world into zones for

 accurate mapping.

69. Vector Data: Geospatial data represented as points, lines, or polygons.

70. Vectorization: The process of converting raster data to vector data.

71. Web GIS: GIS applications and services accessible through web browsers.

72. WMS (Web Map Service): A standard protocol for serving and sharing map images over the internet.

73. WFS (Web Feature Service): A standard protocol for serving and sharing geospatial features over the internet.

74. WMTS (Web Map Tile Service): A standard protocol for serving pre-rendered map tiles over the internet.

75. WKT (Well-Known Text): A text representation of geometric objects in a GIS.

76. WKB (Well-Known Binary): A binary representation of geometric objects in a GIS.

77. Zoom Level: The level of detail shown on a map, determined by the scale or resolution.

78. 3D GIS: A GIS that incorporates three-dimensional data, enabling visualization and analysis in a vertical dimension.

79. 3D Modeling: Creating three-dimensional representations of geographic features or landscapes.

80. 3D Visualization: Displaying and exploring geospatial data in three-dimensional space.

81. 4D GIS: A GIS that includes time as the fourth dimension, enabling temporal analysis.

82. Agent-Based Modeling (ABM): A simulation technique used to model individual entities and their interactions in a geographic environment.

83. Augmented Reality (AR): Overlapping computer-generated information onto a real-world view, often using mobile devices or wearable technology.

84. Bounding Box: The minimum rectangular area that encompasses a set of geographic features or an image.

85. Buffer Analysis: Creating a buffer zone around a geographic feature based on a specified distance.

86. Catchment Area: The area from which water drains to a specific point, such as a river or a lake.

87. Change Detection: Identifying and analyzing differences between multiple datasets taken at different times.

88. Cluster Analysis: Identifying groups of similar features based on their spatial proximity and attribute similarities.

89. Conflation: Merging multiple datasets with similar features to create a more accurate and complete dataset.

90. Crowdsourcing: Gathering geospatial data and information from the public through online platforms or mobile applications.

91. Density Mapping: Creating maps that represent the concentration of points or events in specific geographic areas.

92. Digital Elevation Model (DEM): A digital representation of the Earth's terrain, typically represented as a grid of elevation values.

93. Dissolve: Combining adjacent polygons with the same attribute value into a single, larger polygon.

94. Edge Matching: Aligning adjacent map sheets to ensure a seamless representation of data.

95. Fractal Analysis: Studying the self-similarity and complexity of geographic patterns using fractal geometry.

96. Fuzzy Logic: A mathematical approach that allows for uncertainty and imprecision in spatial analysis.

97. Geoanalytics: The use of advanced statistical and analytical techniques in GIS to extract insights from spatial data.

98. GeoJSON: A data format used to represent geographical features in JSON (JavaScript Object Notation) format.

99. Geoportal: A web-based platform that provides access to geospatial data and services.

100. Geospatial Big Data: Large volumes of geographically referenced data generated from various sources like sensors, mobile devices, and social media.

I hope you find this extended list of GIS terminologies helpful! If you have any more questions or need further explanations, please don't hesitate to ask.

Comments

Popular posts from this blog

Geography of Landslides. Mitigation and Resilience.

A landslide is a geological event in which a mass of rock, earth, or debris moves down a slope under the force of gravity. Landslides can range in size from small to large and can be triggered by natural events such as heavy rainfall, earthquakes, or volcanic activity, or by human activities such as construction or mining. The geography of landslides is affected by a variety of factors that can increase the likelihood of landslides occurring in a particular area. These factors include slope angle and steepness, the type of soil and rock present, the climate and weather patterns of the region, the presence or absence of vegetation, and human activities such as construction, mining, and deforestation. Areas with steep slopes are more prone to landslides because gravity has a stronger effect on loose soil and rock, making it more likely to move downhill. Similarly, areas with loose, sandy soil or weak, fractured rock are more prone to landslides because they are less stable and more easil...

Geography of Flood. Types. Charector.

The geography of floods refers to the characteristics and patterns of floods in different geographic regions. Floods can occur in various landscapes, such as mountains, plains, coastal areas, and urban environments. The geography of a region plays a significant role in determining the frequency, magnitude, and impacts of floods. Some of the factors that influence the geography of floods include: Topography: The shape and elevation of the land can affect the flow and accumulation of water during a flood. For example, flat terrain can lead to slow-moving and widespread flooding, while steep slopes can result in flash floods and landslides. Climate: Regions with high rainfall or snowmelt can experience more frequent and intense floods, while dry regions may experience flash floods due to sudden, heavy rainfall. Hydrology: The characteristics of a river basin, such as its size, shape, and water flow, can influence the severity of a flood. For example, large river basins with extensive floo...

Flood prone regions India

Floods are natural disasters characterized by the overflow of water onto normally dry land. Various factors contribute to floods, including intense rainfall, rapid snowmelt, storm surges from coastal storms, and the failure of dams or levees. The geographical explanation involves understanding the key components of flood-prone regions: 1. Proximity to Water Bodies:    Flood-prone regions are often situated near rivers, lakes, or coastal areas. These locations are more susceptible to flooding as they are in close proximity to large water sources that can overflow during heavy precipitation or storms. 2. Topography:    Low-lying areas with gentle slopes are prone to flooding. Water naturally flows to lower elevations, and flat terrains allow water to accumulate easily. Valleys and floodplains are common flood-prone areas due to their topographical characteristics. 3. Rainfall Patterns:    Regions with high and concentrated rainfall are more likely to experience flooding. Intense and prol...

Landslides. USGS

Landslides. TYPES OF LANDSLIDES The term "landslide" describes a wide variety of processes that result in the downward and outward movement of slope-forming materials including rock, soil, artificial fill, or a combination of these. The materials may move by falling, toppling, sliding, spreading, or flowing. The animated GIF shows a graphic illustration of different types of landslides, with the commonly accepted terminology describing their features. The various types of landslides can be differentiated by the kinds of material involved and the mode of movement.

Volcano

Large magma chamber Bedrock Conduit (pipe) Base Sill Dike Layers of ash emitted by the volcano Flank Layers of lava emitted by the volcano Throat Parasitic cone Lava flow Vent Crater Ash cloud