HORIZONTAL AND VERTICAL GEODETIC CONTROL DATA FOR FLORIDA - MAY 2014

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
National Oceanic and Atmospheric Administration, National Geodetic Survey
Publication_Date: 2004
Title:
HORIZONTAL AND VERTICAL GEODETIC CONTROL DATA FOR FLORIDA - MAY 2014
Edition: latest available
Geospatial_Data_Presentation_Form: Diagram
Series_Information:
Series_Name: N/A
Issue_Identification: N/A
Publication_Information:
Publication_Place: NOAA Campus, Silver Spring, MD
Publisher:
National Oceanic and Atmospheric Administration, National Geodetic Survey
Other_Citation_Details: State of Florida
Online_Linkage: <http://www.ngs.noaa.gov/cgi-bin/datasheet.prl>
Description:
Abstract:
This data contains a set of geodetic control stations maintained by the National Geodetic Survey. Each geodetic control station in this dataset has either a precise Latitude/Longitude used for horizontal control or a precise Orthometric Height used for vertical control, or both. The National Geodetic Survey (NGS) serves as the Nation's depository for geodetic data. The NGS distributes geodetic data worldwide to a variety of users. These geodetic data include the final results of geodetic surveys, software programs to format, compute, verify, and adjust original survey observations or to convert values from one geodetic datum to another, and publications that describe how to obtain and use Geodetic Data products and services.
Purpose:
Provide a base of reference for latitude, longitude and height throughout the United States.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20140519
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -87.429040
East_Bounding_Coordinate: -79.872251
North_Bounding_Coordinate: 30.983191
South_Bounding_Coordinate: 24.492815
Keywords:
Theme:
Theme_Keyword_Thesaurus: NONE
Theme_Keyword:
NSRS, geodetic, horizontal control, vertical control, ellipsoid height, benchmark, orthometric height, latitude, longitude
Theme:
Theme_Keyword_Thesaurus: NONE
Theme_Keyword: imageryBaseMapsLandCover
Theme_Keyword: elevation
Theme_Keyword: planningCadastre
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: The geographic limits of USA including trust Territories
Stratum:
Stratum_Keyword_Thesaurus: N/A
Stratum_Keyword: N/A
Temporal:
Temporal_Keyword_Thesaurus: N/A
Temporal_Keyword: N/A
Access_Constraints:
Geodetic Data are in the public domain, not restricted from access or distribution.
Use_Constraints:
Not restricted; Geodetic Data, including software were developed and compiled with U.S. Government funding; no proprietary rights may be attached to them nor may they be sold to the U.S. Government as part of any procurement of ADP products or services.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA, National Geodetic Survey
Contact_Person: NGS Information Services Branch
Contact_Position: IT Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
SSMC2/9152 1315 East-west Highway
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: 301-713-3242
Contact_Facsimile_Telephone: 301-713-4172
Contact_Electronic_Mail_Address: ngs.software@noaa.gov
Hours_of_Service: 8:30am to 5:00pm EST
Contact_Instructions: Prefer EMail
Data_Set_Credit:
NOAA, National Geodetic Survey and cooperating organizations
Security_Information:
Security_Classification_System: DOD
Security_Classification: Unclassified
Security_Handling_Description: none
Native_Data_Set_Environment:
The data was extracted from NGS datasheets which are available at <http://www.ngs.noaa.gov/cgi-bin/datasheet.prl> The NGS datasheet is a text document which summarizes key geodetic information stored in the NGS database.
Cross_Reference:
Citation_Information:
Other_Citation_Details:
National Geodetic Survey: <http://www.ngs.noaa.gov/>

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
GeoPlan relied on the integrity of the attribute information within the original data.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: 95 percent confidence level for geodetic quality data.
Attribute_Accuracy_Explanation:
Geodetic Data are continuously being processed; their standards and specifications are being reviewed for next publication release. "Standards and Specifications for Geodetic Control Networks", 1984 and "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques," FGCS (formally FGCC) publication version 5.0 1989, are most current published documents.
Logical_Consistency_Report:
FGCS sponsored testing in cooperation with equipment manufacturers and National Institutes of Standards and Technology, Gaithersburg, MD 20850
Completeness_Report:
This dataset DOES NOT include destroyed marks. All other non-publishable marks are NOT included. Non-publishable criteria is available at <http://www.ngs.noaa.gov/cgi-bin/craigs_lib.prl?HELP_NONPUB=1>
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The description of tests are explained in "Geometric Geodetic Accuracy Standards and Specifications For Using GPS Relative Positioning Techniques," FGCS (formally FGCC) publication version 5.0, 1989.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: .05 meters for highest order of accuracy
Horizontal_Positional_Accuracy_Explanation:
Horizontal positional accuracy statements pertain to horizontal control stations only. i.e. Those with geodetic quality Latitude, Longitudes. Positional Accuracy explanation contained in "Geometric Geodetic Accuracy Standards and Specifications For Using GPS Relative Positioning Techniques," FGCS (formally FGCC) publication version 5.0, 1989, (See table 1, p6). with the exception of Order A and Order B which have an accuracy of as described at: <http://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=HORZ%20ORDER>
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The description of tests are explained in "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques," FGCS (formally FGCC) publication version 5.0, 1989, (See table 1, p6).
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: .05 meter for highest order of accuracy
Vertical_Positional_Accuracy_Explanation:
Vertical positional accuracy statements pertain to vertical control stations only. i.e. Those with geodetic quality Orthometric Heights. Orthometric Height accuracy explanation is contained in FGDC publication "Standards and Specifications for Geodetic Control Networks" with the exception of vertical control of class 0 POSTED and READJUSTED Heights which are described at: <http://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=VERT%20ORDER>
Ellipsoid height accuracy explanation contained in "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques," FGCS (formally FGCC) publication version 5.0, 1989. (see table 1, p6). The accuracies for ellipsoid heights are described at: <http://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=ELLP%20ORDER>
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
National Oceanic & Atmospheric Administration, National Geodetic Survey
Publication_Date: 20140519
Title:
"Input Formats and Specifications of the National Geodetic Survey Data Base" published by FGCS (formally FGCC)
Edition: latest available
Geospatial_Data_Presentation_Form: diagram
Series_Information:
Series_Name: N/A
Issue_Identification: N/A
Publication_Information:
Publication_Place: NOAA Campus, Silver Spring, MD
Publisher: NOAA, National Geodetic Survey
Other_Citation_Details: N/A
Online_Linkage: <http://www.ngs.noaa.gov/FGCS/BlueBook/>
Source_Scale_Denominator: Unknown
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1994
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: NOAA, NGS
Source_Contribution: Spatial and Attribute Information
Process_Step:
Process_Description:
The National Geodetic Survey produces geodetic data. Geodetic data comprise the results of geodetic surveys to determine, among other things, latitude, longitude, height, scale, and orientation control. The National Geodetic Survey original field survey project observations and final reports are accessioned into records system of the National Archives and Records Administration of the U.S.A. These surveys provide information valuable for a variety of uses in the mapping, charting and surveying community.
The NGS' final product is the geodetic data sheet. Geodetic data sheets are comprehensive summaries of all published information for a given geodetic reference point, including: the geographic position and/or height based on the current reference datum, condition of the survey mark when it was last visited, a description of where the point is located and how to reach it, and an explanation of the terms used in the data sheet. In support of these geodetic data, the NGS provides software, publications, and various user services, including geodetic advisor program, instrument calibration, surveying standards, and technical workshops.
This dataset contains certain information extracted from the above mentioned data sheet.
Source_Used_Citation_Abbreviation: Geodetic Data
Process_Date: Not complete
Source_Produced_Citation_Abbreviation: NOAA, National Geodetic Survey and cooperating organizations.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: NGS Information Services Branch
Contact_Position: IT Specialist
Contact_Address:
Address_Type: Mailing and Physical Address
Address:
SSMC2/9152 1315 East-west Highway
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: 301-713-3242
Contact_Facsimile_Telephone: 301-713-4172
Contact_Electronic_Mail_Address: ngs.software@noaa.gov
Hours_of_Service: 8:30am to 5:00pm EST
Contact_Instructions: Prefer EMail
Process_Step:
Process_Description:
GeoPlan downloaded this data in on May 22nd, 2014 from the following website: <http://www.ngs.noaa.gov/cgi-bin/datasheet.prl> When downloaded the data was in shapefile format. The data was projected from GCS NAD83 HARN to the FGDL Albers NAD83 HARN projection.
- Changed name from fl.shp to ngs_points_may14.shp - A DESCRIPT field was added based on QUAD. - A FGDLAQDATE field was added based on date GeoPlan acquired the data from the source.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20140522

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Geodetic Data- horizontal positional datum conversion, use program NADCON (version 2.1)
Geodetic Data - vertical positional datum conversion, use program VERTCON (version 2.0)
These programs provide indirect spatial reference data and are available from NOAA, National Geodetic Survey at <http://www.ngs.noaa.gov/PC_PROD/pc_prod.shtml>
Direct_Spatial_Reference_Method: point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 50640

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 24.000000
Standard_Parallel: 31.500000
Longitude_of_Central_Meridian: -84.000000
Latitude_of_Projection_Origin: 24.000000
False_Easting: 400000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.002048
Ordinate_Resolution: 0.002048
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983 (NAD 83)
Ellipsoid_Name: Geodetic Reference System 80 (GRS80)
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.26
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name:
North American Vertical Datum of 1988 (NAVD 88), including Ellipsoidal and Orthometric Heights.
Altitude_Resolution: .01
Altitude_Distance_Units: meters
Altitude_Encoding_Method: implicit coordinate
Depth_System_Definition:
Depth_Datum_Name: the local surface
Depth_Resolution: .01
Depth_Distance_Units: meters
Depth_Encoding_Method: implicit coordinate

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: NGS_POINTS_MAY14
Entity_Type_Definition: NGS_POINTS_MAY14.DBF
Entity_Type_Definition_Source:
National Oceanic & Atmospheric Administration, National Geodetic Survey
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: FeatureId
Attribute_Definition: Temporary unique ID assigned to this station.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: DATA_DATE
Attribute_Definition:
The date when this information was retrieved from the NGS database.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: DATA_SRCE
Attribute_Definition:
Data Source where the information for the mark came from. You should use this link to obtain a full datasheet for the mark or obtain the datasheets from <http://www.ngs.noaa.gov/cgi-bin/datasheet.prl> if you intend to use the data for survey control.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: DEC_LONG
Attribute_Definition:
Decimal equivalent of the LONGITUDE Always displayed to 10 decimal places, but you should see POS_SRCE and POS_ORDER to determine the true accuracy.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: DEC_LAT
Attribute_Definition: Decimal equivalent of the LATITUDE
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: PID
Attribute_Definition: Permanent Identifier assigned by NGS to each mark
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: NAME
Attribute_Definition: Station Name (a.k.a. Designation)
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: STATE
Attribute_Definition: State Code
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: COUNTY
Attribute_Definition: County Name
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: QUAD
Attribute_Definition: USGS Topographic Quad Map Name
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition: Latitude in Deg-Min-Sec format
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition: Longitude in Deg-Min-Sec format
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: POS_DATUM
Attribute_Definition: Datum of the LATITUDE,LONGITUDE Should always be NAD83
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: DATUM_TAG
Attribute_Definition:
Datum Tag of the LATITUDE,LONGITUDE NAD83 (1986) indicates positions on the NAD83 datum for the North American Adjustment, completed in 1986. NAD83 (nnnn) indicates positions on the NAD83 datum for the North American Adjustment, but readjusted to a State High Accuracy Reference Network (HARN) on the date shown in (nnnn). NAD83 (CORS) indicates positions which are part of the CORS network.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: POS_SRCE
Attribute_Definition: Position Source for the LATITUDE,LONGITUDE
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: ADJUSTED
Enumerated_Domain_Value_Definition:
Least squares adjustment. (Lat,Lon Rounded to 5 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: HD_HELD1
Enumerated_Domain_Value_Definition:
Differentially corrected hand held GPS observations. (Lat,Lon Rounded to 2 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: HD_HELD2
Enumerated_Domain_Value_Definition:
Autonomous hand held GPS observations. (Lat,Lon Rounded to 1 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: SCALED
Enumerated_Domain_Value_Definition:
Scaled from a topographic map. (Lat,Lon Rounded to 0 decimal places.)
Attribute:
Attribute_Label: ELEVATION
Attribute_Definition:
Present if available. The Orthometric Height in METERS indicating the height above the Geoid.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: ELEV_DATUM
Attribute_Definition: Datum of the ELEVATION
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: ELEV_SRCE
Attribute_Definition: Elevation Source for the ELEVATION
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: ADJUSTED
Enumerated_Domain_Value_Definition:
Direct Digital Output from Least Squares Adjustment of Precise Leveling. (Rounded to 3 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: ADJ UNCH
Enumerated_Domain_Value_Definition:
Manually Entered (and NOT verified) Output of Least Squares Adjustment of Precise Leveling. (Rounded to 3 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: POSTED
Enumerated_Domain_Value_Definition:
Pre-1991 Precise Leveling Adjusted to the NAVD 88 Network After Completion of the NAVD 88 General Adjustment of 1991. (Rounded to 3 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: READJUST
Enumerated_Domain_Value_Definition:
Precise Leveling Readjusted as Required by Crustal Motion or Other Cause. (Rounded to 2 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: N HEIGHT
Enumerated_Domain_Value_Definition:
Computed from Precise Leveling Connected at Only One Published Bench Mark. (Rounded to 2 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: RESET
Enumerated_Domain_Value_Definition:
Reset Computation of Precise Leveling. (Rounded to 2 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: COMPUTED
Enumerated_Domain_Value_Definition:
Computed from Precise Leveling Using Non-rigorous Adjustment Technique. (Rounded to 2 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: LEVELING
Enumerated_Domain_Value_Definition:
Precise Leveling Performed by Horizontal Field Party. (Rounded to 2 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: H LEVEL
Enumerated_Domain_Value_Definition:
Level between control points not connected to bench mark. (Rounded to 1 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: GPS OBS
Enumerated_Domain_Value_Definition: Computed from GPS Observations. (Rounded to 1 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: VERT ANG
Enumerated_Domain_Value_Definition:
Computed from Vertical Angle Observations. (Rounded to 1 decimal place; If No Check, to 0 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: SCALED
Enumerated_Domain_Value_Definition: Scaled from a Topographic Map. (Rounded to 0 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: U HEIGHT
Enumerated_Domain_Value_Definition:
Unvalidated height from precise leveling connected at only one NSRS point. (Rounded to 2 decimal places.)
Enumerated_Domain:
Enumerated_Domain_Value: VERTCON
Enumerated_Domain_Value_Definition:
The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height. (Rounded to 0 decimal places.)
Attribute:
Attribute_Label: ELLIP_HT
Attribute_Definition:
Present if available. The ellipsoid height in METERS referenced to GRS80 ellipsoid.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: ELLIP_SRCE
Attribute_Definition:
Ellipsoid Ht Source for the ELLIP_HT Should always be GPS_OBS when present.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: POS_ORDER
Attribute_Definition:
Order of accuracy for the LATITUDE,LONGITUDE Should be one of the following- A,B,1,2,3 Order and class for Orders 1, 2, and 3 are defined in the Federal Geodetic Control Committee publication "Standards and Specifications for Geodetic Control Networks". In addition- Order A stations have a relative accuracy of 5 mm +/- 1-10,000,000 relative to other A-order stations. Order B stations have a relative accuracy of 8 mm +/- 1- 1,000,000 relative to other A- and B-order stations.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: POS_CHECK
Attribute_Definition: Observational Check
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Y
Enumerated_Domain_Value_Definition: Observational Check was made for the position
Enumerated_Domain:
Enumerated_Domain_Value: N
Enumerated_Domain_Value_Definition: NO Observational Check was made for the positions
Attribute:
Attribute_Label: ELEV_ORDER
Attribute_Definition:
Order of accuracy for the ELEVATION Should be 1,2, or 3 for Vertical Control Stations. Will be blank for stations used for Horizontal Control only. Also see attribute DIST_RATE which is used for some vertical control stations. Elevation order and class for 1, 2, and 3 are defined in the Federal Geodetic Control Committee publication "Standards and Specifications for Geodetic Control Networks". In addition- Vertical control which were determined only for the purpose of supplying a height for Horizontal Distance Reductions are assigned an order of 3. Class 0 is used for special cases of orthometric vertical control as follows-
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: class 0 - 2.0 mm or less
Enumerated_Domain:
Enumerated_Domain_Value: 2
Enumerated_Domain_Value_Definition: class 0 - 8.4 mm or less
Enumerated_Domain:
Enumerated_Domain_Value: 3
Enumerated_Domain_Value_Definition: class 0 - 12.0 mm or less
Attribute:
Attribute_Label: ELEV_CLASS
Attribute_Definition: Should be 0, 1, or 2 See details under ELEV_ORDER
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: ELEV_CHECK
Attribute_Definition: Observational Check
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Y
Enumerated_Domain_Value_Definition: Observational Check was made for the orthometric height,
Enumerated_Domain:
Enumerated_Domain_Value: N
Enumerated_Domain_Value_Definition: NO Observational Check was made for the orthometric heights
Attribute:
Attribute_Label: DIST_RATE
Attribute_Definition:
Distribution rate for POSTED and READJUSTED benchmarks which do not have an Order and Class are as follows "Posted bench marks" are vertical control points in the NGS data base which were excluded from the NAVD 88 general adjustment. Some of the bench marks were excluded due to large adjustment residuals, possibly caused by vertical movement of the bench marks during the time interval between different leveling epochs. Adjusted NAVD 88 are computed for posted bench marks by supplemental adjustments. A range of mean distribution rate corrections is listed for each posted bench mark in the data portion of the publication. A summary table of the mean distribution rates and their codes is listed below. The mean distribution rate corrections which were applied to the original leveling observations is a good indication of the usefulness of the posted bench marks' adjusted NAVD 88 heights. POSTED BENCH MARKS SHOULD BE USED WITH CAUTION. As is the case for all leveling projects, the mandatory FGCS check leveling two-mark or three-mark tie procedure will usually detect any isolated movement (or other problem) at an individual bench mark. Of course, regional movement affecting all the marks equally is not detected by the two- or three-mark tie procedure.
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: a
Enumerated_Domain_Value_Definition: 0.0 thru 1.0 mm/km
Enumerated_Domain:
Enumerated_Domain_Value: b
Enumerated_Domain_Value_Definition: 1.1 thru 2.0 mm/km
Enumerated_Domain:
Enumerated_Domain_Value: c
Enumerated_Domain_Value_Definition: 2.1 thru 3.0 mm/km
Enumerated_Domain:
Enumerated_Domain_Value: d
Enumerated_Domain_Value_Definition: 3.1 thru 4.0 mm/km
Enumerated_Domain:
Enumerated_Domain_Value: e
Enumerated_Domain_Value_Definition: 4.1 thru 8.0 mm/km
Enumerated_Domain:
Enumerated_Domain_Value: f
Enumerated_Domain_Value_Definition: greater than 8.0 mm/km
Attribute:
Attribute_Label: ELLP_ORDER
Attribute_Definition:
Order of accuracy for the ELLIP_HT Should be 1,2,3,4, or 5 if present. The following ellipsoid height order and class relative accuracy standards have not yet been adopted by the Federal Geodetic Control Subcommittee, but are currently in use by NGS-. The ellipsoid height difference accuracy (b) is computed from a a minimally constrained correctly weighted least squares adjustment by - b = s / sqrt(d) where b = height difference accuracy s = propagated standard deviation of ellipsoid height difference in millimeters between control points obtained from the least squares adjustment. d = horizontal distance between control points in kilometers
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: order 1 - class 1
Enumerated_Domain_Value_Definition: 0.5 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 1 - class 2
Enumerated_Domain_Value_Definition: 0.7 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 2 - class 1
Enumerated_Domain_Value_Definition: 1.0 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 2 - class 2
Enumerated_Domain_Value_Definition: 1.3 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 3 - class 1
Enumerated_Domain_Value_Definition: 2.0 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 3 - class 2
Enumerated_Domain_Value_Definition: 3.0 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 4 - class 1
Enumerated_Domain_Value_Definition: 6.0 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 4 - class 2
Enumerated_Domain_Value_Definition: 15.0 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 5 - class 1
Enumerated_Domain_Value_Definition: 30.0 (mm)/sqrt(km)
Enumerated_Domain:
Enumerated_Domain_Value: order 5 - class 2
Enumerated_Domain_Value_Definition: 60.0 (mm)/sqrt(km)
Attribute:
Attribute_Label: ELLP_CLASS
Attribute_Definition:
Class of accuracy for ELLIP_HT Should be 1 or 2 See details under ELLP_ORDER
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: FIRST_RECV
Attribute_Definition:
Date when the station was first monumented or in the case of landmarks, first observed.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: LAST_RECV
Attribute_Definition: Date when the station was last recovered.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: LAST_COND
Attribute_Definition:
Last recovered condition of the mark. Should be one of the following- MONUMENTED FIRST OBSERVED GOOD POOR MARK NOT FOUND SEE DESCRIPTION DESTROYED
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: LAST_RECBY
Attribute_Definition: Agency who reported the last condition of the mark.
Attribute_Definition_Source: National Geodetic Survey
Attribute:
Attribute_Label: SAT_USE
Attribute_Definition: Undefined by Source
Attribute_Definition_Source: Unknown
Attribute_Domain_Values:
Attribute:
Attribute_Label: SAT_DATE
Attribute_Definition: Undefined by Source
Attribute_Definition_Source: Unknown
Attribute:
Attribute_Label: STABILITY
Attribute_Definition:
The stability of the mark may have 1 of 4 codes as indicated below-
Attribute_Definition_Source: National Geodetic Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: A
Enumerated_Domain_Value_Definition: MOST RELIABLE AND EXPECTED TO HOLD POSITION/ELEVATION WELL
Enumerated_Domain:
Enumerated_Domain_Value: B
Enumerated_Domain_Value_Definition: PROBABLY HOLD POSITION/ELEVATION WELL
Enumerated_Domain:
Enumerated_Domain_Value: C
Enumerated_Domain_Value_Definition:
MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO SURFACE MOTION - E.G. FROST HEAVE, ETC
Enumerated_Domain:
Enumerated_Domain_Value: D
Enumerated_Domain_Value_Definition: MARK OF QUESTIONABLE OR UNKNOWN STABILITY
Attribute:
Attribute_Label: DESCRIPT
Attribute_Definition: GeoPlan added field based on QUAD
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: FGDLAQDATE
Attribute_Definition: Date GeoPlan acquired data from source
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: AUTOID
Attribute_Definition: Unique ID added by GeoPlan
Attribute_Definition_Source: GeoPlan
Overview_Description:
Entity_and_Attribute_Detail_Citation:
All values were obtained from the NGA Datasheet available at <http://www.ngs.noaa.gov/cgi-bin/datasheet.prl>

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Geographic Data Library (FGDL)
Contact_Person:
Contact_Position:
Contact_Address:
Address_Type: mailing address
Address: 431 Architecture PO Box 115706
City: Gainesville
State_or_Province: Florida
Postal_Code: 32611-5706
Country: United States
Contact_Voice_Telephone:
Contact_TDD/TTY_Telephone:
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: Web site: <http://www.fgdl.org>
Contact_Electronic_Mail_Address: Technical Support: <http://www.fgdl.org/fgdlfeed.html>
Contact_Electronic_Mail_Address: For FGDL Software: <http://www.fgdl.org/software.html>
Contact_Electronic_Mail_Address:
FGDL Frequently Asked Questions: <http://www.fgdl.org/fgdlfaq.html>
Contact_Electronic_Mail_Address: Mailing list for FGDL: <http://www.fgdl.org/fgdl-l.html>
Hours_of_Service:
Contact_Instructions:
Resource_Description: DOWNLOADABLE DATA
Distribution_Liability:
The Florida Geographic Data Library is a collection of Geospatial Data compiled by the University of Florida GeoPlan Center with support from the Florida Department of Transportation. GIS data available in FGDL is collected from various state, federal, and other agencies (data sources) who are data stewards, producers, or publishers. The data available in FGDL may not be the most current version of the data offered by the data source. University of Florida GeoPlan Center makes no guarantees about the currentness of the data and suggests that data users check with the data source to see if more recent versions of the data exist.
Furthermore, the GIS data available in the FGDL are provided 'as is'. The University of Florida GeoPlan Center makes no warranties, guaranties or representations as to the truth, accuracy or completeness of the data provided by the data sources. The University of Florida GeoPlan Center makes no representations or warranties about the quality or suitability of the materials, either expressly or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. The University of Florida GeoPlan Center shall not be liable for any damages suffered as a result of using, modifying, contributing or distributing the materials.
A note about data scale:
Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modeling purposes. Please be sure you are using the best available data.
1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger.
Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our webpage at: <http://geoplan.ufl.edu/education.html>
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ShapeFile
Format_Version_Number: 0.3.0
File_Decompression_Technique: Download options include PC Zip and Unix compressed tar
Transfer_Size: 1.352
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://www.ngs.noaa.gov/cgi-bin/datasheet.prl?Explain=ShapeFiles>
Access_Instructions:
Distributed through <http://www.ngs.noaa.gov/cgi-bin/datasheet.prl>
Online_Computer_and_Operating_System: SUN Solaris
Fees: free if you retrieve it yourself
Technical_Prerequisites:
This data is intended for use with a Geographic Information Systems or Remote Sensing software package.

Metadata_Reference_Information:
Metadata_Date: 20040129
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
National Oceanic & Atmospheric Administration, National Geodetic Survey
Contact_Person: NGS Information Services Branch
Contact_Position: IT Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: SSMC2/9152 1315 East-west Highway
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: 301-713-3242
Contact_Facsimile_Telephone: 301-713-4172
Contact_Electronic_Mail_Address: ngs.software@noaa.gov
Hours_of_Service: 8:30am to 5:00pm EST
Contact_Instructions: Prefer EMail
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints:
Geodetic Data are in the public domain, not restricted from access or distribution.
Metadata_Use_Constraints:
not restricted; Geodetic Data, including software were developed and compiled with U.S. Government funding; no proprietary rights may be attached to them nor may they be sold to the U.S. Government as part of any procurement of ADP products or services.
Metadata_Security_Information:
Metadata_Security_Classification_System: DOD
Metadata_Security_Classification: unclassified
Metadata_Security_Handling_Description: none
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.9.6 on Tue Jul 01 13:07:17 2014