In addition to providing public access to chart data, ENC Online will also help NOAA cartographers improve our current suite of ENCs. Viewers can measure areas and distance, and use other functions. This allows the user to seamlessly zoom from the high level of detail of the large scale Band 5 ENCs, to small-scale overviews available on Band 1. Each zoom moves you through an ENC depiction that takes into account the ENC scale band and other attributes that are encoded in the ENC, such as scale minimum and feature masking. Users can click on the web map and zoom to selected features or locations, to see the information contained in over a thousand ENCs of NOAA-charted waters. Since NOAA ENC Online is web-based, there is nothing to download. NOAA ENC downloads are still free to the public.) ( IMMEDIATE CAVEAT: You still need a specialized display system to use the multi-layered functional data that make ENCs so valuable. Starting today, you don’t need a system to view the ENC depictions you can use Coast Survey’s new web-based viewer called NOAA ENC® Online. For more than ten years, since NOAA introduced its electronic navigational charts, you have needed to purchase a specialized chart display system to view the NOAA ENC® as a seamless chart database.
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