Elevation

Elevation is the orthogonal distance of the Earth’s surface from the WGS84 ellipsoid at a provided location; i.e., the Altitude of the ground level.

Relevant NENA Documents
Note: To find and download the document, copy the document number (like STA-010) from below and search the NENA Standards and Documents page.

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NENA-REQ-003, NENA Requirements for 3D GIS for E9-1-1 and NG9-1-1