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A clean reference shelf for map reading, geospatial systems, coordinates, routing, and the mechanics behind modern digital maps.
Latitude
Latitude is the angular distance of a place north or south of the Equator and is a fundamental component of geographic coordinate systems.
Open articleLongitude
Longitude is the angular distance of a place east or west of a prime meridian and forms one half of the standard geographic coordinate system.
Open articleMap Legend
A map legend is a guide that explains the meaning of symbols, colors, and patterns used on a map.
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Articles are grouped to make the front page easier to scan and less like a flat file list.
Fundamentals
Coordinate systems, orientation, projection, and basic map literacy.
Latitude
Latitude is the angular distance of a place north or south of the Equator and is a fundamental component of geographic coordinate systems.
Read articleLongitude
Longitude is the angular distance of a place east or west of a prime meridian and forms one half of the standard geographic coordinate system.
Read articleMap Legend
A map legend is a guide that explains the meaning of symbols, colors, and patterns used on a map.
Read articleMap Symbols
Map symbols are visual signs used to represent geographic features, categories, and relationships on a map.
Read articleMap Scale
Map scale expresses the relationship between distance on a map and distance in the real world.
Read articleCompass
A compass is an instrument used to determine direction, most commonly by reference to the Earth's magnetic field.
Read articleGPS
GPS is a satellite-based navigation system that provides position, timing, and velocity information to users on or near Earth.
Read articleMap Projections
Map projections are methods for representing the curved surface of the Earth on a flat plane.
Read articleSystems
How spatial data is structured, rendered, grouped, and delivered.
Map Generalization
Map generalization is the controlled simplification of geographic information so that it remains legible and useful at a given scale.
Read articleClustering
In cartography and geospatial analysis, clustering is the grouping of nearby features or data points to reveal concentration and reduce visual congestion.
Read articleMap Layers
Map layers are separate sets of geographic information that can be combined to form a complete cartographic view.
Read articleTiles Rendering
Tile rendering is a method of displaying maps by dividing geographic content into many small square sections that can be loaded and drawn efficiently.
Read articleGeospatial Data
Geospatial data is information that describes objects, events, or phenomena by reference to location on or near the Earth's surface.
Read articleMap APIs
Map APIs are software interfaces that allow software systems to display maps and use geographic functions such as search, routing, and geocoding.
Read articleHow Web Maps Work
Web maps are interactive map systems delivered through browsers and built from geographic data, network requests, rendering engines, and user interface controls.
Read articleOperations
Search, routing, proximity, movement, and applied spatial logic.
Points of Interest (POI)
A point of interest is a specific location that is considered noteworthy, useful, or relevant within a geographic context.
Read articleDistance
Distance is a measure of separation between locations and is a fundamental concept in geography, navigation, and spatial analysis.
Read articleRadius Search
Radius search is a spatial query method that finds locations within a specified distance of a central point.
Read articleBounding Boxes
A bounding box is a rectangular frame used to enclose a geographic feature or area for indexing, display, and spatial querying.
Read articleGeofencing
Geofencing is the use of virtual geographic boundaries to detect and respond to movement in relation to a defined area.
Read articleNavigation
Navigation is the process of determining position and planning or following a course from one place to another.
Read articleTravel Time
Travel time is the duration required to move between locations and is a central measure of accessibility in geography and transport studies.
Read articleShortest Path Algorithms
Shortest path algorithms are computational methods used to find efficient routes through networks such as roads, railways, and communication systems.
Read articleReverse Geocoding
Reverse geocoding is the process of converting geographic coordinates into a human-readable place description such as an address, locality, or named feature.
Read articleForward Geocoding
Forward geocoding is the process of converting a textual place description such as an address or place name into geographic coordinates.
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