Latitude Longitude System
Latitude Longitude System - Related Videos
01:27
Latitudes and Departures
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2025
Latitudes and departures are essential concepts in surveying, providing a systematic way to analyze the projections of traverse lines. These projections allow surveyors to interpret a line's north-south and east-west components, which are crucial for precisely calculating areas, bearings, and lengths. Latitude is the north-south projection of a line, calculated as the product of the line's length and the cosine of its bearing. Departure, conversely, is the east-west projection obtained by...
10:58
Using GIS to Investigate Urban Forestry
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Urban forests broadly include urban parks, street trees, landscaped boulevards, public gardens, river and coastal promenades, greenways, river corridors, wetlands, nature preserves, natural areas, shelterbelts of trees, and working trees at industrial brownfield sites. The history of urban trees begins with trees as landscape embellishment. Today, urban trees are seen as essential components of city infrastructure...
16:14
Trajectory Data Analyses for Pedestrian Space-time Activity Study
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Cited by 15 •
2013
A suite of spatiotemporal processing methods are presented to analyze human trajectory data, such as that collected using a GPS device, for the purpose of modeling pedestrian space-time activities.
10:46
A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
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Cited by 2 •
2015
Combining plot analysis with trigonometric regression is a robust method for exploring complex, cyclical phenomena such as relapse onset timing in multiple sclerosis (MS). This method enabled unbiased characterisation of seasonal trends in relapse onset permitting novel inferences around the influence of seasonal variation, ultraviolet radiation (UVR) and latitude.
10:17
Cities As Interfaces of Zoonotic Hazard Emergence: Development of the New York City Tick and Wildlife Urban Surveillance System
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2026
There is a critical need to monitor how ticks and their wildlife hosts respond to urbanization. This protocol outlines the steps for developing a standardized Tick and Wildlife Urban Surveillance System that will enable adaptive management in response to emerging tick-borne hazards in urban environments.
FAQs
The equator and Prime Meridian provide fixed zero references for angular measurements. A position is therefore described by two signed directional changes: north or south from the equator and east or west from the Prime Meridian. This shared convention allows measurements made in different locations or studies to be compared within one geographic reference frame.
Coordinates describe angular location on Earth’s approximately spherical surface rather than ordinary distances on a flat plane. Spherical geometry preserves the relationship between angular measurements and position around the globe. This matters when analyzing global spatial data or translating a coordinate pair into a three-dimensional position, because Earth’s radius supplies the scale.
Latitude and longitude specify direction on Earth’s surface through two angles, whereas a position vector represents the same location in three-dimensional space. Converting between them adds Earth’s radius as a scale parameter. The coordinate form is convenient for geographic mapping, while the vector form connects the location with physical calculations using spatial geometry.
The conversion requires the latitude, the longitude, and a value for Earth’s radius. First, the angular coordinates identify the surface direction relative to the equator and Prime Meridian. The radius then supplies the distance from Earth’s center, allowing the location to be represented as a three-dimensional position vector rather than only as angular data.
In physics and Earth science, the system provides a consistent way to assign locations to observations and tracked objects. Geophysics can use coordinates to organize spatial measurements, while satellite tracking uses them to describe positions. Climate studies and global spatial analyses likewise depend on consistent geographic references when comparing data from different regions.
Coordinate-based analysis can identify where measurements, tracked objects, or environmental observations occur and place them within a common global framework. When a radius is available, the same locations can also become three-dimensional vectors for geometric analysis. These outcomes support mapping, navigation, satellite tracking, geophysics, climate studies, and interpretation of global spatial datasets.