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As a result of the work on Lake Superior, eight new charts of that lake were published between 1865 and 1873. The charts were given away for free to mariners. Between October 1861 and October 1865, 15,210 navigational charts had been distributed to Great Lakes mariners, bringing the number issued since 1852 to 30,120.
Lake Superior's water level was at a new record low in September 2007, slightly less than the previous record low in 1926. [25] Water levels recovered within a few days. [26] Historic high water The lake's water level fluctuates from month to month, with the highest lake levels in October and November. The normal high-water mark is 1.17 feet (0 ...
Automatically labeled nautical chart. Nautical charts must be labeled with navigational and depth information. There are a few commercial software packages that do automatic label placement for any kind of map or chart. Modern systems render electronic charts consistent with the IHO S-52 specification, issued by the International Hydrographic ...
OpenSeaMap is a software project collecting freely usable nautical information and geospatial data to create a worldwide nautical chart. This chart is available on the OpenSeaMap website, and can also be downloaded for use as an electronic chart for offline applications. [1] The project is part of OpenStreetMap. OpenSeaMap is part of the ...
Chicago Bay is a small bay on the North Shore of Lake Superior located at 1] Hovland, Minnesota, is nearby. ... NOAA Nautical Chart 14967
A chart datum is the water level surface serving as origin of depths displayed on a nautical chart and for reporting and predicting tide heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. [1] Common chart datums are lowest astronomical tide (LAT) [1] and mean lower low water (MLLW).