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  2. List of satellite map images with missing or unclear data

    en.wikipedia.org/wiki/List_of_satellite_map...

    During talks with the Indian government, Google issued a statement saying "Google has been talking and will continue to talk to the Indian government about any security concerns it may have regarding Google Earth." [4] Google agreed to blur images on request of the Indian government. [1]

  3. Magnetic declination - Wikipedia

    en.wikipedia.org/wiki/Magnetic_declination

    For example, if the boat is aligned to magnetic north and the compass' north mark points 3° more east, deviation is +3°. Deviation varies for every compass in the same location and depends on such factors as the magnetic field of the vessel, wristwatches, etc. The value also varies depending on the orientation of the boat.

  4. Talk:List of satellite map images with missing or unclear data

    en.wikipedia.org/wiki/Talk:List_of_satellite_map...

    "REPORTER'S NOTEBOOK: Orbital View: Google Earth on Acid". The Atlantic There's even a whole Wikipedia page for "Satellite map images with missing or unclear data," as is wont. Editorial (5 May 2014). "GOOGLE MAPS: KEEPING AN EYE ON ISRAEL". Canadian Jewish News

  5. Google Earth - Wikipedia

    en.wikipedia.org/wiki/Google_Earth

    Google Earth is a web and computer program that renders a 3D representation of Earth based primarily on satellite imagery.The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.

  6. Magnetic dip - Wikipedia

    en.wikipedia.org/wiki/Magnetic_dip

    Magnetic dip causes the compass to dip upward or downward depending on the latitude. Illustration of magnetic dip from Norman's book, The Newe Attractive. Magnetic dip, dip angle, or magnetic inclination is the angle made with the horizontal by Earth's magnetic field lines. This angle varies at different points on Earth's surface.

  7. Null Island - Wikipedia

    en.wikipedia.org/wiki/Null_Island

    Natural Earth describes the entity as a "1 meter square island" with "scale rank 100, indicating it should never be shown in mapping". [7] The name "Null" refers to the two zero coordinates, as null values (indicating an absence of data) are often coerced to a value of 0 when converted to an integer context or "no-nulls allowed" context .

  8. Compass rose - Wikipedia

    en.wikipedia.org/wiki/Compass_rose

    A compass rose or compass star, sometimes called a wind rose or rose of the winds, is a polar diagram displaying the orientation of the cardinal directions (north, east, south, and west) and their intermediate points. It is used on compasses (including magnetic ones), maps (such as compass rose networks), or monuments.

  9. Heading (navigation) - Wikipedia

    en.wikipedia.org/wiki/Heading_(navigation)

    The most common use of the TVMDC method is deriving compass courses during nautical navigation from maps. The inverse correction from compass heading to true heading is "CDMVTAE", with compass heading, deviation, magnetic heading, variation, true heading, add easterly The most common use of the CDMVTAE rule is to convert compass headings to map ...