All Topics

AM-94 - Machine Learning Approaches

Machine learning approaches are increasingly used across numerous applications in order to learn from data and generate new knowledge discoveries, advance scientific studies and support automated decision making. In this knowledge entry, the fundamentals of Machine Learning (ML) are introduced, focusing on how feature spaces, models and algorithms are being developed and applied in geospatial studies. An example of a ML workflow for supervised/unsupervised learning is also introduced. The main challenges in ML approaches and our vision for future work are discussed at the end.

KE-19 - Managing GIS operations and infrastructure
  • Calculate the estimated schedule required to carry out all of the implementation steps for an enterprise GIS of a given size
  • List some of the topics that should be addressed in a justification for implementing an enterprise GIS (e.g., return on investment, workflow, knowledge sharing)
  • Indicate the possible justifications that can be used to implement an enterprise GIS
  • Exemplify each component of a needs assessment for an enterprise GIS
  • Describe the components of a needs assessment for an enterprise GIS
AM-06 - Map algebra
  • Explain the categories of map algebra operations (i.e., local, focal, zonal, and global functions)
  • Explain why georegistration is a precondition to map algebra
  • Differentiate between map algebra and matrix algebra using real examples
  • Perform a map algebra calculation using command line, form-based, and flow charting user interfaces
  • Describe a real modeling situation in which map algebra would be used (e.g., site selection, climate classification, least-cost path)
  • Describe how map algebra performs mathematical functions on raster grids
CV-23 - Map analysis
  • Create a profile of a cross section through a terrain using a topographic map and a digital elevation model (DEM)
  • Measure point-feature movement and point-feature diffusion on maps
  • Describe maps that can be used to find direction, distance, or position, plan routes, calculate area or volume, or describe shape
  • Explain how maps can be used in determining an optimal route or facility selection
  • Explain how maps can be used in terrain analysis (e.g., elevation determination, surface profiles, slope, viewsheds, and gradient)
  • Explain how the types of distortion indicated by projection metadata on a map will affect map measurements
  • Explain the differences between true north, magnetic north, and grid north directional references
  • Compare and contrast the manual measurement of the areas of polygons on a map printed from a GIS with those calculated by the computer and discuss the implications these variations in measurement might have on map use
  • Determine feature counts of point, line, and area features on maps
  • Analyze spatial patterns of selected point, line, and area feature arrangements on maps
  • Calculate slope using a topographic map and a DEM
  • Calculate the planimetric and actual road distances between two locations on a topographic map
  • Plan an orienteering tour of a specific length that traverses slopes of an appropriate steepness and crosses streams in places that can be forded based on a topographic map
  • Describe the differences between azimuths, bearings, and other systems for indicating directions
CV-34 - Map Icon Design

The use of map icons is an efficient way to condense a map object into a concise expression of geospatial data. Like all cartographic design, map icon design merges artistic and scientific elements into symbolic representations intended to be readily legible to map readers. This entry reviews the types of map icons and elements of icon design, including the ways in which the visual variables are used in map icon communication. As communicative devices, icons are imbued with cultural meanings and can oftentimes lead to the preservation of stereotypes. This review concludes with an examination of icons’ perpetuation of – and challenge to – cultural stereotypes.

CV-22 - Map interpretation
  • Identify the landforms represented by specific patterns in contours on a topographic map
  • Hypothesize about geographic processes by synthesizing the patterns found on one or more thematic maps or data visualizations
  • Match features on a map to corresponding features in the world
  • Compare and contrast the interpretation of landscape, geomorphic features, and human settlement types shown on a series of topographic maps from several different countries
CV-30 - Map Production and Management

Map production describes the experience of managing the many aspects and details of map creation. Often the map product is created for someone else—a client, supervisor, or instructor. Describing the intention of the map and evaluating available resources ahead of the project can help the cartographer define content requirements, stay on task, and ultimately meet deadlines. The project management life cycle involves clear communication between the cartographer and client, with resolutions to common questions best addressed at the beginning of the project. The process then iteratively cycles through phases that include research and production, followed by quality control, and concludes with file preparation and delivery.

CV-06 - Map Projections

Map projection is the process of transforming angular (spherical / elliptical) coordinates into planar coordinates. All map projections introduce distortion (e.g., to areas, angles, distances) in the resulting planar coordinates. Understanding what, where, and how much distortion is introduced is an important consideration for spatial computations and visual interpretation of spatial patterns, as well as for general aesthetics of any map.

CV-21 - Map reading
  • Discuss the advantages and disadvantages of using conventional symbols (e.g., blue=water, green=vegetation, Swiss cross=a hospital) on a map
  • Find specified features on a topographic map (e.g., gravel pit, mine entrance, well, land grant)
  • Match map labels to the corresponding features
  • Match the symbols on a map to the corresponding explanations in the legend
  • Execute a well designed legend that facilitates map reading
  • Explain how the anatomy of the eye and its visual sensor cells affect how one sees maps in terms of attention, acuity, focus, and color
  • Explain how memory limitations effect map reading tasks
AM-48 - Mathematical models of uncertainty: probability and statistics
  • Devise simple ways to represent probability information in GIS
  • Describe the basic principles of randomness and probability
  • Compute descriptive statistics and geostatistics of geographic data
  • Interpret descriptive statistics and geostatistics of geographic data
  • Recognize the assumptions underlying probability and geostatistics and the situations in which they are useful analytical tools