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Map

The left window is a Google map, with pushpin icons at kayak put-ins, tide stations, and other points of interest. There are standard Google Maps controls on the map. Note: these controls are provided by Google and may change in future versions.
  • Map Type Selector (upper left corner of the map):
    • Map: with or without Terrain shading.
    • Satellite: Satellite image, with or without Labels for roads and place names.
  • Traffic button (upper-right corner of the map): This shows the current traffic conditions of major highways.
  • Fullscreen button (below the Traffic button): Shows the map in fullscreen mode. Type <esc> to exit from fullscreen.
  • Zoom Controls (lower-right corner of the map):
    • Click the + button to zoom in.
    • Click the button to zoom out.
  • Street View (above the Zoom controls): drag the little man onto the map to show Street View at the dropped location (if available).
  • Click Icon: Click any icon and it will move to the center of the map. Click it again and a brief description of the location will pop up.
  • Show or Hide Icons: Click an icon in the map key beneath the map to hide all icons of that type; click it again to show them.
    • Tide: Tide height prediction stations.
    • Current: Tidal current prediction stations.
    • Subordinate: NOAA tide and current prediction stations come in two types: Harmonic and Subordinate. Harmonic stations have detailed mathematical models to accurately predict tides or currents throughout the day. Subordinate stations make predictions by applying fixed corrections to the predictions of a nearby Harmonic (a.k.a. Reference) station. Subordinate predictions are accurate only at the tidal extremes: high and low tide, max ebb and max flood. See Types of Stations in the NOAA Tide Predictions Users Guide for more details. The Reference station and correction parameters for a Subordinate station appear at the bottom of the Details Tab listing.
    • Legacy: Tide and current prediction stations based on older and/or unofficial data. Users of previous versions of the Trip Planner may be more familiar with these stations. Both predicted values and marker positions are suspect for Legacy stations.
    • Ebb&Flow: Tidal current visualization. Arrows on the map show the speed and direction of currents at current stations, at the time shown under the tide graph. Drag the vertical red time cursor on the graph to see the currents change throughout the day. For Harmonic stations (black arrows), speed and direction predictions come from the NOAA CO-OPS server. For Subordinate stations (gray arrows with double-line arrowheads), speed predictions come from XTide, but direction predictions are not available, so the arrow always points in the mean ebb or flood direction for the station. For a small number of Harmonic stations (e.g Oakland Harbor Entrance, Southampton Shoal Channel, Benicia Bridge), CO-OPS provides actual measurements of speed and direction; these are shown with blue arrows when they are in service (they often are not). You can change the scale of the arrows using the selector under the tide graph. All arrows have white tick marks at knot intervals. When the scale is medium or large, there are also yellow half-knot ticks.
    • Put-In: Kayak access points.
    • Destination: Interesting places to go in your kayak.
    • Meeting Place: Places on land where kayakers meet.
    • YourCoast: Access points listed on the California Coastal Commission YourCoast website.
    • Bay Area Water Trail: Access points on the Bay Area Water Trail.
    • Aerial Photo: There is only one Aerial Photo icon, but you can drag it anywhere on the map. A thumbnail-sized aerial photo of the nearby coastline will pop up. Click on the thumbnail to open a new window with a larger image. Photos are provided by the California Coastal Records Project.
      Note: Currently no images are available for the SF Bay shoreline.

Tabbed Information Display

Click a pushpin icon to display associated weather, tide, and current information on the tabbed sheets to the right of the map. The selected icon will move to the center of the map, and a star will appear under it to indicate that it has been selected.

  • Tides Tab: A text table of tides or currents, below a graph of the same data. On current graphs, positive (blue) values are flood currents, negative (green) values are ebb currents. Use the clickable text between the graph and the tables to get a prediction for another day, or to select how many days of predictions are displayed.
    The red cursor line on the graph corresponds to the red entry in the tables; click on another table entry or another part of the graph to move the cursor.
    Note: The tide and current predictions are done by XTide version 2.15.3. By default all of the tide and current prediction stations are based on up-to-date NOAA data downloaded from the XTide website (harmonics-dwf-20210110-free.tcd). Click on the Legacy icon under the map to also see prediction stations based on older and/or unofficial data. Click the Details tab to see where we got the prediction data for the selected station.
  • Weather Tab: The NOAA marine forecast for the selected icon is displayed. The banner at the top shows the current weather conditions for a nearby city, according to Weather Underground.
  • Details Tab: A brief description of the selected location. For tide and current stations, you'll see a description of the TCD data on which predictions are based.
  • Directions: Get driving directions to or from the selected location. Directions will be displayed in a separate Google Maps window.
  • Search Tab: This tab has two kinds of search:
    • Search for a location by name: Type something into the text box and click the Search button. The list of all locations matching your text will be displayed. Click any of the results to select that location. The Tides, Weather, and Details tabs will now show data for the selected location.
    • Search for tides or currents: In conjunction with the Tides tab, you can search for tidal extremes (max ebb, low tide, etc.) within a specified time period, at the tide or current station selected on the map. A period of one, three, six, or twelve months starts on the date selected in the Tides tab. You can restrict the search to certain days of the week, hours of the day, and a given tidal range. Optionally, you can look for sequences of high and low tide, or max ebb and flood within the specified hours. All matching days are displayed in a table. Click on a date in the table to see that day's tides displayed in the Tides tab.
    • Search for YourCoast features: Looking for a dog-friendly sandy beach with no fee? You can find it with this function. Select Yes for the features that you want, No for the features that you don't want. Only the matching YourCoast locations will be shown on the map.
  • Measure Tab: Measure distances along a track, and get GPS coordinates of points on the map. See instructions on the tab page.
  • Help Tab: You're looking at it now!

Saving and Sharing your Session

  • Click the Save link, to the right of the Help tab. This will pop up a dialog containing two items: a text box which you can copy and paste from, and a clickable link. They each contain the entire state of your session, including the map view, the selected icon, the selected tab, and (optionally) the tide prediction dates and your From address in the Directions tab. Copy and paste from the text box into email, for example, to send a link to this page to someone else. If you want to bookmark the session in your browser, click the link, wait for the page to reload, then bookmark it. Check the Make a very short URL checkbox to shorten the link using the services of goo.gl.
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