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  2. Gold Canyon, Arizona - Wikipedia

    en.wikipedia.org/wiki/Gold_Canyon,_Arizona

    According to the United States Census Bureau, the CDP has a total area of 22.3 square miles (57.8 km 2), all land. Gold Canyon is located on U.S. Route 60. Peralta Regional Park, a Regional Park, is located in Gold Canyon, east of Peralta Road. The park is 498 acres in area. [9] The park was opened at 10:00 a.m. on January 11, 2023. [10]

  3. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    The user may choose to replace the inclination angle by its complement, the elevation angle (or altitude angle), measured upward between the reference plane and the radial line—i.e., from the reference plane upward (towards to the positive z-axis) to the radial line. The depression angle is the negative of the elevation angle.

  4. Depression (geology) - Wikipedia

    en.wikipedia.org/wiki/Depression_(geology)

    A watering hole is a natural depression where water collects and animals come to drink. Karst closed depression with permanent lake Stymfalia, Peloponnese, Greece. Seasonal abundant precipitation drained by 3 sinkholes. In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms.

  5. File:Year 9 Trigonometry; Angles of Elevation and Depression ...

    en.wikipedia.org/wiki/File:Year_9_Trigonometry;...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  6. Headward erosion - Wikipedia

    en.wikipedia.org/wiki/Headward_erosion

    Widening of the canyon by erosion inside the canyon, below the canyon side top edge, or origin or the stream, such as erosion caused by the streamflow inside it, is not called headward erosion. Headward erosion is a fluvial process of erosion that lengthens a stream, a valley or a gully at its head and also enlarges its drainage basin. The ...

  7. Gold Canyon - Wikipedia

    en.wikipedia.org/wiki/Gold_Canyon

    Gold mining began in Gold Canyon in the early 1850s and has continued to present day. Three major gold mines are located here: German Bar Mine, Gold Canõn Mine, and Independent Mine. [1] In 1859 the Gold Canyon area became the first to ban Chinese miners, after a group of 50 Chinese miners had earned a reported $35,000.

  8. Side looking airborne radar - Wikipedia

    en.wikipedia.org/wiki/Side_looking_airborne_radar

    This angle γ = 90° − β is called grazing angle. The angle θ = ε + 90° is used for a mathematical description in a spherical coordinate system. For the approximation of a flat earth – which is usual for airborne radar with short to medium range – the grazing angle and the depression angle can be assumed to be equal γ = ε and the ...

  9. Cañada del Oro - Wikipedia

    en.wikipedia.org/wiki/Cañada_del_Oro

    The Cañada del Oro (Spanish, 'Canyon of Gold'), is a primary watershed channel in Oro Valley, Arizona, U.S. [1]. The Cañada del Oro originates in the remote Canyon del Oro in the Santa Catalina Mountains north of Tucson, fed by rainfall and melted snow from the northern face of Mount Lemmon and flows northward toward the town of Oracle.