Getting Alaska’s National Hydrography Data into OpenStreetMap

The current coastline in OpenStreetMap is lacking in detail for much of Alaska, particularly the very coastal, Southeast Alaska.

Myriad Islands - as they appeared in OSM June 2019 (-136.209, 57.634)

I’d like to use National Hydrography Data to improve the entirety of Southeast Alaska in OpenStreetMap. Here is a side-by-side comparison map that shows current OpenStreetMap data (as of 2019-06-07) with NHD data.

OSM / NHD Comparison

The coastline has been my particular interest ever since I started editing the map.

… Gweld y cofnod llawn