Magnetic Survey Data Form

Date range of interest: to both in decimal years (data available from 1900 to present)

Please enter the latitude and longitude range (in decimal degrees) over which you would like the data to be extracted:

LATITUDE, please enter southernmost latitude followed by northernmost (in the range -90 to 90):

From degrees to degrees

LONGITUDE, please enter westernmost longitude followed by easternmost (in the range 0 to 360):

From degrees to degrees

Types of data required: one-off land survey data; aeromagnetic data;

three-component marine data; satellite data; marine total intensity data;

repeat station data; observatory (variometer) station data.

To download the data or plot on the map, choose one of the following options: Download Data Plot on Map

To clear the form, press this button:

To obtain results from a web service in JSON, GEO-JSON (adding -pp for more human readable format) or CSV format use requests like https://gifswebapi.bgs.ac.uk/wdc/global-survey/data/?start-year=2015.0&end-year=2020.0&north-latitude=90.0&south-latitude=-90.0&west-longitude=0.0&east-longitude=360.0&add-source-information=False&format=geo-json-pp modifying the query string parameters as appropriate. Simple documentation for the web service parameters is available at https://gifswebapi.bgs.ac.uk/wdc/global-survey/.