Eye4Software Hydromagic

  Hydrographic Survey Software

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Eye4Software Hydromagic - Knowledge Base - Tags - GEOID18

Q200018 I want to use GEOID18B for the United States, how do I know which zone I must use?
The GEOID18 model for CONUS (the The contiguous United States) is divided into eight (8) zones to reduce file size and reduce lookup times. To determine which geoid zone you have to use, please have a look at the table below: Zone No. Latitude Range (N) Longitude Range ( ...
Tags:  GEOID12, GEOID12A, GEOID12B, GEOID18, NAVD88, geoid model, zones, CONUS