File:Columbia River Mouth and Bar.jpg
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English: Topographic map of the underwater area in and around the mouth of the Columbia River in the state of Oregon, USA. Map is based on soundings in feet taken by the National Oceanic and Atmospheric Administration and published in NOAA navigational chart #18521, "Columbia River - Pacific Ocean to Harrington Point", August 2009 (original chart available here: http://www.charts.noaa.gov/OnLineViewer/18521.shtml) which itself is a public domain image.
Topographic lines on this map begin at a depth of 15 feet and occur at 5-foot intervals continuously down to 310 feet (i.e., the edge of the map). Land masses (states of Washington and Oregon) are shown in dark green with urbanized areas highlighted around the edge in bright green. Tidal sand bars are shown in yellow. Français : Carte topographique de l'estuaire et de la zone sous-marine périphérique à l'embouchure du fleuve Columbia dans l'état de l'Oregon, aux États-Unis. D'après les données de laNOAA (Administration nationale des océans et de l'atmosphère ; carte de navigation n ° 18521, "Fleuve Columbia - océan Pacifique à Harrington Point", août 2009 ; la carte originale est disponible ici: http://www.charts.noaa.gov/OnLineViewer/18521.shtml, elle-même publiée sous licence domaine public). Les lignes topographiques commencent à une profondeur de 15 pieds et apparaissent à intervalles de 5 pieds de manière continue jusqu'à 310 pieds (bord gauche de la carte). Les masses continentales (États de Washington et de l'Oregon) apparaissent en vert foncé avec les zones urbanisées surlignées en vert clair. Les bancs de sable de marée sont indiquées en jaune. |
| Date | |
| Source | Own work |
| Author | KDS444 |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:38, 18 December 2012 | | 3,957 × 2,557 (4.04 MB) | KDS444 (talk | contribs) | Added labels for the towns of Ilwaco and Long Beach, Washington, and made labels for North Jetty, South Jetty, and Sand Island more visible in thumbnail view. |
| 12:57, 16 December 2012 |  | 3,957 × 2,557 (4.05 MB) | KDS444 (talk | contribs) | Added labels for jetties and Sand Island | |
| 12:27, 16 December 2012 |  | 3,957 × 2,557 (4.03 MB) | KDS444 (talk | contribs) | Added all contour lines down to 310 ft. | |
| 19:20, 15 August 2012 |  | 900 × 582 (472 KB) | KDS444 (talk | contribs) | corrections | |
| 20:37, 12 August 2012 |  | 1,200 × 775 (697 KB) | KDS444 (talk | contribs) |
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