HORIZONTAL AND VERTICAL GEODETIC CONTROL DATA FOR FLORIDA - MAY 2014

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

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