Description: REGIONCONTROL data provides georeferencing for the analysis and adjustment of data in an offline editing session.It includes:- legacy control used in the adjustments for the current publication version- "historical" control points whose values have been disabled because their contribution to an optimal solution has been questioned.- any new control being analyzed for possible integration into enterprise data.- adjusted points just outside the adjustment boundary, but are endpoints of REGIONLINES crossing the adjustment boundary. These points are held fixed by weighting and are assumed to be unaffected by the addition of new data in the adjustment dataset.Each user has control of their own REGIONCONTROL table to explore various assumptions in analyzing the uncertainties in measurement data. The user can detect and correct data entry blunders and determine the usability and reliability of new survey data before committing the integrated data to the enterprise CONTROL table for publication.The dataset can be shared with reviewing and approving officials and, once approved, can overwrite the enterprise CONTROL geodatabase for publication.REGIONCONTROL is overwritten each time a new adjustment area is defined.
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Copyright Text: Geodatabase table designed by Dennis K. McKay
Description: Each user has control of their own REGIONPOINT table. The data represents pre-adjustment coordinates until the adjustment is approved. In the current BLM implementation the GMM software performs adjustments with plane coordinates so this geodatabase is populated with an automatically-chosen state plane coordinate zone based on values in the GMMDATASET geodatabase table.All tables from the user's adjustment dataset can be shared as a package with reviewing and approving officials and, once approved, can update the adjustment area in the enterprise publication geodatabases.REGIONPOINT is overwritten each time a new adjustment area is defined.
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Copyright Text: Geodatebase table designed by Dennis K. McKay
Description: REGIONLINE contains the dimensional data from SURVEYLINE existing for survey lines fully within or touching the ADJUSTMENT polygon created by the user for offline editing.All distances have been converted to a single unit and to a ground distance and from grid distances. All bearings have been converted to true mean azimuth from their native values. Any known corrections have been applied to the distances and bearings found in SURVEYLINE.Each user has control of their own REGIONLINE table to explore various assumptions in analyzing the uncertainties in measurement data. The user can detect and correct data entry blunders and determine the usability and reliability of new survey data.All tables from the user's adjustment dataset can be shared as a package with reviewing and approving officials and, once approved, can update the adjustment area in the enterprise publication geodatabases.REGIONLINE is overwritten each time a new adjustment area is defined.
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Copyright Text: Geodatabase table designed by Dennis K. McKay
Description: The survey data within this polygon can be used to analyze and integrate new survey data. Summary statistics of the adjustment are held in persistent storage as attributes of the adjustment polygon.
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Copyright Text: Geodatabase table designed by Dennis K. McKay
Description: The SOURCE table contains data about surveys that allow the user to make determinations of the unreliablility of measurement data for the purpose of weighting least square adjustments and deriving a meaningful "error ellipse" for each coordinate
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Copyright Text: The SOURCE table was designed by Dennis K. McKay. Where possible and appropriate, field names and field definitions are from the PROJECT table of the Multistate Cadastral Corner Control database, a national standard.
Description: The CURVE table contains the essential elements to define curves that serve as parcel boundaries. The geometry of these curves are represented in the survey measurement network as a line (chord) between the endpoints of the curve. To represent each of these curved parcel boundaries a curve feature is created based on its mathematical definition stored as a record in this table. This CURVE table defines the information needed to create four kinds of curves:1) a Circular curve2) a Spiral curve3) an offset to a Spiral curve (this is not concentric to the spiral centerline)4) a median line curve. This is a parabolic curve created from points along the bank of an abandoned channel. The curve is the boundary between upland owners of their newly acquired land in the abandoned channel. and represents equal distance between the original embankments.This data is applied during the conversion of survey measurement geometries to parcel boundary geometries which occurs after adjusting survey measurements and before creating parcel polygons from parcel lines.
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Copyright Text: Geodatabase designed by Dennis K. McKay
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Description: In the Public Land Survey System a Township refers to a unit of land, that is nominally six miles on a side, usually containing 36 sections.
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