It may be possible by very skillful use of some software products to manipulate NOAA charts into a format useful with Garmin chart plotters, but this appears to be a rather tedious process and not likely to be easy or free. Furuno says " NavNet TZtouch is the only chart plotter on the market that provides users the ability to choose from official NOAA raster and vector charts Instead of trying to compile such a list, I will mention a few products I have used.
Ward Niffenegger. Actually, they are not charts at all, but merely databases that computer software can interpret and create a chart. That it the purpose of the viewer or chart navigation software. If you look in the archives, you will find a great deal of discussion on this topic. That said, I am glad it keeps surfacing because this IS the future of charts. It only makes sense that keeping a dynamic database will be much cheaper to maintain by NOAA than to continuely reproduce charts.
He said that Garmin digitizes them. Derek Rowell. Richard, you are wasting your time That's because the ENC charts are still being developed and new ones are being released weekly. They still do not have Narragansett Bay for example - so how could Garmin possibly use them? The Garmin charts were around before the ENC releases were really underway.
I have looked at the structure of ENC charts and the data compression used in the Maptech charts. You say you have somebody looking at "the language" Garmin uses.
It's not a language that in question - its the data format on the chip. That's a closely held secret by the company.
Great Lakes ice cover experiences a LOT of year-to-year variability. This image below illustrates the long-term mean in annual maximum ice cover for Lake Ontario's extreme depth 86 m average; m maximum translates to tremendous heat storage capacity. It also has a smaller surface area for heat loss. In addition, cold air outbreaks from the northwest and west are moderated by the waters of Lakes Superior, Michigan, and Huron.
These factors combine to keep ice cover on Lake Ontario at a relatively low level most years. Maximum ice cover on the lower lakes like Lake Erie normally occurs between mid-February and end of February. Maximum ice cover on the upper lakes like Lake Superior normally occurs between end of February and early March. The relationship between ice cover, evaporation, and water levels is complex.
Data on modeled evaporation shows that this process peaks in the fall, before ice cover formation. In a severe ice cover year such as , the thermal structure of the lake could be impacted for the rest of the year, potentially reducing evaporation from the lakes next fall.
Evaporation and precipitation are the major drivers of seasonal water level changes in the Great Lakes. Ice extent plays a part in determining water temperature in the lakes later in the year, as incoming heat will have to melt the ice before it warms the water below. However, meteorological conditions and heat storage in the lakes are also critical components to the thermal cycle in the lakes. Sometimes blue ice develops on the Great Lakes. This is an unusual phenomenon in the Great Lakes that is usually short-lived.
What causes blue ice? Ice can also absorb orange and green light as light energy absorbed by the ice causes the water molecules to vibrate, which can lead to absorption of orange and green light. Family Sharing With Family Sharing set up, up to six family members can use this app. More By This Developer. Cleanly - Restaurant Health Inspections. Cleanly Miami Restaurant Inspe. Zbor na Den - Angliski. Word A Day - Chinese. Zbor Na Den.
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