- InfoBank geodetic survey Activity-ID naming convention:
- "Geodetic" (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.
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.
- Geodetic information occurs in the
InfoBank
as:
scattered
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< Activity-ID >.utm files containing UTM X,Y,Z information.
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metadata
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information about geodetic inventory of gear, deployment of gear, operation of gear, and magnetic media.
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- InfoBank geodetic data file names:
<Activity-ID>.utm
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UTM X,Y,Z of geodimeter location, control points, and data points
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- InfoBank geodetic metadata file names:
<Activity-ID>.conditions
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skies, temperature, barometric pressure, wind, precipitation, sea state, optical siting, etc. conditions
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<Activity-ID>.data_files
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list and descriptions of raw, edited, imagery, etc. data files
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<Activity-ID>.geo_equipment
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geodetic equipment systems metadata
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<Activity-ID>.header
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description of location and dates
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<Activity-ID>.image_files
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list and descriptions of image files
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<Activity-ID>.location
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ellipsoid, horizontal datum, vertical datum, UTM zone, latitude, longitude, elevation, northing, easting metadata
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<Activity-ID>.notes
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notes and comments
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<Activity-ID>.observations
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special observations
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<Activity-ID>.post-processing
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post-data collection processing metadata
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<Activity-ID>.precision
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horizontal and vertical precision and accuracy metadata
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<Activity-ID>.procedure
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field procedures
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<Activity-ID>.synopsis
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synopsis of activity
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"Every path serves a purpose." -- Gene Oliver
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