Earth Gravity API

Earth Gravity API

Calculate geoid height and gravity anomaly values using the EGM2008 model.

API description

The gravitational field of the earth is non-uniform. The geoid is the shape the ocean surface would take if only gravity and the rotation of the Earth were considered. The geoid is the surface that defines zero elevation.

The geoid height is the difference between an ideal reference ellipsoid and the geoid.

The gravity anomaly is the difference between the acceleration due to gravity on the Earth's surface and the value calculated assuming the reference ellipsoid.

The official Earth Gravitational Model EGM2008 was developed and released to the public by the National Geospatial-Intelligence Agency (NGA).

Potential applications:

  • Geodesy and Surveying: Accurate determination of geoid heights, crucial for precise GPS positioning.
  • Satellite Orbits and Navigation: Enhanced accuracy in orbit prediction and positioning of satellites.
  • Climate and Oceanography: Improved understanding of ocean circulation patterns and sea level variations.
  • Resource Exploration: Support for mineral and hydrocarbon exploration through accurate gravity field information.
  • Global Positioning and Mapping: Improved accuracy of global positioning systems (GPS) for navigation and mapping applications.
  • Academic and Research Applications: Support for academic research in fields like geophysics, geodesy, and atmospheric sciences.

Our Gravity API provides on-demand access to the EGM2008 model.

API Documentation

Endpoints


Calculate the geoid height for a given latitude / longitude using EGM2008



                                                                            
GET https://zylalabs.com/api/3316/earth+gravity+api/3568/geoid+height
                                                                            
                                                                        

Geoid height - Endpoint Features
Object Description
Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                            {
  "height": {
    "units": "m",
    "value": 45.88107058892659
  }
}
                                                                                                                                                                                                                    
                                                                                                    

Geoid height - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/3316/earth+gravity+api/3568/geoid+height' --header 'Authorization: Bearer YOUR_API_KEY' 

    

The gravity anomaly is the difference between the acceleration due to gravity on the Earth's surface and the value calculated assuming the reference ellipsoid.



                                                                            
GET https://zylalabs.com/api/3316/earth+gravity+api/3569/gravity+anomaly
                                                                            
                                                                        

Gravity anomaly - Endpoint Features
Object Description
latitude [Required] Geographic latitude (-90 to 90 deg).
longitude [Required] Geographic longitude (-180 to 180 deg).
Test Endpoint

API EXAMPLE RESPONSE

       
                                                                                                        
                                                                                                                                                                                                                            {
  "eta": {
    "units": "arcsec",
    "value": -0.9413662219916251
  },
  "gravity_anomaly": {
    "units": "mGal",
    "value": 27.954737031742376
  },
  "xi": {
    "units": "arcsec",
    "value": 1.371151956763653
  }
}
                                                                                                                                                                                                                    
                                                                                                    

Gravity anomaly - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/3316/earth+gravity+api/3569/gravity+anomaly?latitude=-45&longitude=-45' --header 'Authorization: Bearer YOUR_API_KEY' 

    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Earth Gravity API REST API, simply include your bearer token in the Authorization header.

Headers

Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.


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A Web API, or Application Programming Interface, is a set of rules and protocols that allows different software applications to communicate with each other over the internet. It defines the methods and data formats that applications can use to request and exchange information. Web APIs enable the integration of different services and systems, allowing them to work together seamlessly.

The gravitational field of the earth is non-uniform. The geoid is the shape the ocean surface would take if only gravity and the rotation of the Earth were considered. The geoid is the surface that defines zero elevation.

The geoid height is the difference between an ideal reference ellipsoid and the geoid. Variations in the geoid height are related to the density of the earth, so they can help us to better understand its internal structure. It is also used to measure surface elevations to high accuracy which is useful in applications such as GPS and surveying.

The gravity anomaly is the difference between the acceleration due to gravity on the Earth's surface and the value calculated assuming the reference ellipsoid.

The official 2008 Earth Gravitational Model EGM2008 was developed and released to the public by the National Geospatial-Intelligence Agency (NGA). This gravitational model is complete to spherical harmonic degree and order 2159. Our Earth Gravity API provides programmatic access to the EGM2008 model.

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 Service Level
100%
 Response Time
1,602ms

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