{
 "guid": "",
 "name": "magnetics_wdmam_rtp_lp20km",
 "licenseInfo": "",
 "tags": [
  "nz. gns. magetic. anomaly. map. frogtech."
 ],
 "url": "https://gis.gns.cri.nz/server/admin/geophysical/magnetics_wdmam_rtp_lp20km/ImageServer",
 "title": "MAGNETICS_WDMAM_RTP_LP20KM",
 "thumbnail": "thumbnail/thumbnail.png",
 "summary": "Data sourced from the FROGTECH_NZ_ECS_SEEBASE product in the NZP&M 2013 Block Offer Data Pack.\n\nThe magnetic grid was generated by FROGTECH from the World...",
 "snippet": "Data sourced from the FROGTECH_NZ_ECS_SEEBASE product in the NZP&M 2013 Block Offer Data Pack.\n\nThe magnetic grid was generated by FROGTECH from the World...",
 "culture": "en-US",
 "catalogPath": "",
 "typeKeywords": [
  "Data",
  "Service",
  "Image Service",
  "ArcGIS Server"
 ],
 "spatialReference": "NZGD_2000_New_Zealand_Transverse_Mercator",
 "type": "Image Service",
 "accessInformation": "FROGTECH",
 "description": "Data sourced from the FROGTECH_NZ_ECS_SEEBASE product in the NZP&M 2013 Block Offer Data Pack.The magnetic grid was generated by FROGTECH from the World Digital Magnetic Anomaly Map (WDMAM) or EMAG3 (2007), a global 3-arc-minute resolution grid of the anomaly of the magnetic intensity at an altitude of 5 km above mean sea level. It was compiled from satellite, marine, aeromagnetic and ground magnetic surveys. Information on this dataset can be found in http://www.geomag.us/models/wdmam.html The TMI magnetic data was Reduced to the Pole (RTP). The RTP image showed numerous noise and artefacts which were further attenuated by applying a Low Pass (20Km) filter. This filter passes low frequencies but substantially attenuates (or reduces) frequencies higher than 20km, emphasizing magnetic anomalies with wavelengths greater than 20km. Caution is warranted "
}