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    What is the elevation of Lake Michigan?

    What is the elevation of the Willis Tower?

    What is the vegetation in the mountain flanks?

  2. The Elevation of Chicago: A Statistical Mystery | Chicago ...

    4 days ago · When the level of Lake Michigan is 580 feet on IGLD85, it is about 580.5 feet on NAVD88 and 1.3 feet on the Chicago City Datum. Historically the NAVD88 has been used for land and the IGLD85 for water. Thus if you are standing on the beach and dip a toe in the water, your wet toe is suddenly six inches lower than your dry toe.

  3. Mean High Water - Wikipedia

    6 days ago · Mean High Water (MHW) is a Tidal Datum representing the average of all the daily tidal high water heights observed over a period of several years. In the United States this period spans 19 years and is referred to as the National Tidal Datum Epoch.

  4. MTL to NAVD88 Correction - SLAMM Forum

    3 days ago · NAVD 7.176 North American Vertical Datum You can see from these results that, at this site, an elevation of 1.0 meters in NAVD88 units will actually be located below MTL. In this case, the MTL minus NAVD88 will be roughly 1.06 meters. As a general rule, if your MTL-NAVD parameter goes up then elevations go down.

  5. San Jacinto Mountains - Wikipedia

    13 hours ago · The height and steepness of the range points out that the San Jacinto fault and San Andreas fault are very active and very capable of producing major earthquakes (well in excess of magnitude 7). The last massive quake struck the southern segment of the San Andreas-San Jacinto fault complex more than 200 years ago making another major earthquake ...

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  6. Geoid - Wikipedia

    4 days ago · Conversely, height determined by spirit leveling from a tidal measurement station, as in traditional land surveying, is always geoidal height. Modern GPS receivers have a grid implemented in the source of the geoid (e.g. EGM-96) height over the World Geodetic System (WGS) ellipsoid from the current position.

  7. Datum: Canadian Geodetic Vertical Datum of 1928

    2 days ago · Vertical Datum used in Canada - CGVD28. Canadian Geodetic Vertical Datum of 1928 is a vertical datum first defined in 1928-01-01 and is suitable for use in Canada - onshore - Alberta; British Columbia; Manitoba south of 57°N; New Brunswick; Northwest Territories south west of a line between 60°N, 110°W and the coast at 132°W; Nova Scotia; Ontario south of 52°N; Prince Edward Island ...

  8. Crest Considers Ways to Curb Flooding | Environment ...

    4 days ago · First, commissioners may introduce a new bulkhead ordinance, requiring bulkheads to be constructed at an 8.0 elevation standard. According to a January survey, 25% of Crest bulkheads meet the...

  9. Daily Water Flow & Water Conditions for the PNW Area | Avista

    3 days ago · The elevation of Lake Spokane at the Long Lake dam is 1535.55, which is at autumn elevation. We expect the elevation of Lake Spokane to stay about the same until sometime in late December. It is important to remember that water levels could change drastically due to a variety of factors such as weather or equipment problems at the Post Falls dam.

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