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USGS CMG "Total station" Definition

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  • This documents InfoBank's usage of "total station".

  • "Total station" (as used within the CMG InfoBank ) is the horizontal and vertical positioning of a ship, platform, benchmark, survey location, etc.

  • The positions are commonly UTM x/y/z or latitude, longitude, elevation triplets.
  • InfoBank Total station survey Activity-ID naming convention:
    California |Pt. Reyes| San Francisco| San Mateo Co.|
    |Santa Cruz Co.| Monterey Bay| Carmel Bay|
    |Estero Bay| Santa Barbara Co.| Ventura Co.|
    |Hawaii| Maui| Oahu|

  • UTMs
    • UTM x/y coordinates are a rectangular coordinate system with units in meters from the equator (the "y" value) and meters from a central meridian (the "x" value).
    • The central meridian defines a 6 degree wide zone.
    • The zone must beknown for uniqueness.
    • Zone 1 starts at the International Date Line, has a central meridian 3 degrees counterclockwise around the earth from there (-177d), and continues another 3degrees.
    • Zone 2 has a central meridian of -171d (-177 - 6), and so on around the globe. Latitudes and longitudes
    • Latitudes are parallel to the Equator and range from -90 degrees (South Pole) to+90 degrees (North Pole).
    • The northern hemisphere has positive latitudes.
    • The southern hemisphere has negative latitudes.
    • Longitudes are perpendicular to the Equator are range from -180 degrees (International Date Line) to +179.99999... degrees (just west of the International Date Line).
    • Under this convention -- the western hemisphere has negative longitudes and the eastern hemisphere has positive longitudes.

  • Total station information occurs in the InfoBank as:
    scattered < Activity-ID >.utm files containing UTM X,Y,Z information.
    metadata information about Total station inventory of gear, deployment of gear, operation of gear, and magnetic media.

  • InfoBank Total station data file names:
    <Activity-ID>.utm UTM X,Y,Z of geodimeter location, control points, and data points

  • InfoBank Total station metadata file names:
    <Activity-ID>.conditions skies, temperature, barometric pressure, wind, precipitation, sea state, optical siting, etc. conditions
    <Activity-ID>.data_files list and descriptions of raw, edited, imagery, etc. data files
    <Activity-ID>.geo_equipment Total station equipment systems metadata
    <Activity-ID>.header description of location and dates
    <Activity-ID>.image_files list and descriptions of image files
    <Activity-ID>.location ellipsoid, horizontal datum, vertical datum, UTM zone, latitude, longitude, elevation, northing, easting metadata
    <Activity-ID>.notes notes and comments
    <Activity-ID>.observations special observations
    <Activity-ID>.post-processing post-data collection processing metadata
    <Activity-ID>.precision horizontal and vertical precision and accuracy metadata
    <Activity-ID>.procedure field procedures
    <Activity-ID>.synopsis synopsis of activity
"Every path serves a purpose." -- Gene Oliver

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Page Last Modified: Mon Nov 4 03:37:28 PST 2013  (chd)