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CategoryTermWorking Definition
Notes/Comments from Stace
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See https//docs.google.com/document/d/1DokoZoN98wwP1tnXHiTViXAT1y1xFL57E-XxvV8oqQs for some intial work from the IIIF Maps Community group.
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GeocodeAlgorithmic determination of a numeric (coordinate) location from a text-based location (ie: street address to lat/long, zipcode to Zipcode Tabulation Area Centroid (Coordinate Point, etc...)
the key here is the numeric location (coordiates). geocoding is a specific form of geolocation
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Geolocate???? This, perhaps, refers to the use of a numeric description of the spatial domain. Identification or estimation of the real-world geographic location of an object. The process or technique of identifying the geographical location of a thing.
this comonly refers to identifying the "location" of an object, in the context of live services. For instance, Uber uses the GPS form your device to "geolocate" or "determine the geolocation" of a user. It can be thought of as more general than Geocoding, which is a form of geolocation.
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GeorectifyCommonly used to indicate the stacking of data “layers” (scanned maps, basemaps, satellite imagery, vector data, etc…), based upon a common geographic or projected coordinate system
Be careful using this term. Rectification is, technically, the act of taking a georeferenced image that is being "warped" on the fly using Control Points and exporting it to to new set of planimetric pixels. Georeferenced images that have been "rectified" often exhibit the background or "NODATA" value "black triangles" familiar to those who work with satellite imagery.
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GeoreferenceAugmentation of an image representation of the surface of the Earth to allow “co-location” with other spatially enabled datasets. Assigning real-world coordinates to image coordinates.
the identification of Ground Control Points, which identify the geographic coordiates that correspond to specific pixel coorindates in an image representation (scanned map, aerial photo, oblique photo, etc...) of the surface of the Earth.
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Co-locateThe stacking of data “layers” (scanned maps, basemaps, satellite imagery, vector data, etc…), based upon a common geographic or projected coordinate system
this is pretty much spot on.
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Geospatial vs spatiotemporalspatial data is not necessarily temporal, though it will often be referencing a particular point in time. Some spatial imagery formats (NetCDF) do incorporate temporality into spatial data, but these are esoteric datasets, probably not relevant to GLAM.
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Map vs Globe(Image of Map vs Interactive Space ex. Leaflet/Mapbox/etc.)
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Geographic Coordinate SystemSystem for referencing locations on the surface of the 3-Dimensional Earth. Enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position.
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Projected Coordinate System (Commonly: Projection)Systems for mathematical transformation of Geographic Coordinates to a planimetric system for measurement and representation of features on flat surfaces (paper, or computer monitors). Projections are generally designed to minimize the distortion of Shape, Area, Distance, Direction, or some combination of these geometric characteristics for limited regions.
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Spatial Reference Systema coordinate-based local, regional or global system used to locate geographical entities. A spatial reference system defines a specific map projection, as well as transformations between different spatial reference systems.
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Coordinate Reference System == Spatial Reference System ??
Commonly used interchangeably
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Ground/Control Pointsare the key to accurately georeferencing parcels on the surface of the earth in a coordinate-based cadastral system.
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Geometrically Correct == Georectify ???
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OrthorectifyTo take an image in its original geometry and very accurately adjust it so that it is in a known coordinate system, with distortions due to topographic variation corrected. An orthorectified image has uniform scale throughout the image. A DEM (and by this, I mean an image in which the pixel values represent the ground elevation above sea level) is required for true orthorectification.
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Cadastral SystemA specific system (of a map or survey) providing geographic/geometric and other information about land, as property (ownership, value extent, etc...), on the surface of the Earth.
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Web Map
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GeoJSON
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GeoJSON-LD
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