Geospatial_Data_Requirements_Incirlik_AB.pdf

Geospatial Data Requirements for

LJYC 13-4001 ,RPR SANITARY SEWER SYSTEM,FALCON HOUSING MFH

Incirlik AB, Turkey

30 Nov. 2013

1.0 General The Contractor shall use Global Positioning System (GPS) technology to locate and collect data on water utilities that are installed or modified as a result to the Contractor’s installation work. Required features for this contract are included in this attachment. The Contractor shall convert the GPS data to an ESRI Personal Geodatabase (PGDB) set suitable for the Government to load the file and transcribe information from the Personal Geodatabase into the installation’s GeoBase database.

1.1 GPS Data Collection Requirements

1.1.1 GPS Accuracy Standards The Contractor shall use GPS to determine the horizontal position of water utulities features in accordance with the Federal Geographic Data Committee (FGDC)-STD-007.4-2002. FGDC publications are downloadable from the website:

http://www.fgdc.gov/.

1.1.2 GPS Accuracy of Feature Locations Each feature requiring geospatial coordinates shall be located to within one meter of its true ground position, in the horizontal plane, with a 95% spatial accuracy confidence level as defined in FGDC-STD-007.3-1998 (Refer to paragraph 1.2.2.for documentation requirements) . Geospatial coordinates for the location of manholes(valve box) and vaults shall be recorded for the center of the manhole(valve box) lid.

Geospatial coordinate data for the location of utulity pathways lines shall be recorded at a minimum of every 50 feet along the lines. Also, at each turn or bend in the utulity pathways, coordinates must also be collected and recorded so that the coordinates for any point along the pathway lines will fall within the allowable accuracy.

1.1.3 GPS Data Format The Contractor shall format the data dictionary in the GPS data loggers by using the entity naming convention, attribute fields and domain values as specified in Table A. GPS data loggers shall be set up to record and export the GPS Data Collector Setup properties listed in Table B. All GPS data shall comply with the Version 2.6 of the Spatial Data Standards for Facilities, Infrastructure, and Environment (SDSFIE) available from the Defense Installation Spatial Data Infrastructure Group.

1.2 Geospatial Data Requirements

1.2.1 Shape Files The GPS collected features and utulity pathways attribute, metadata, and location information shall be converted to, stored, and submitted in Environmental Systems Research Institute (ESRI) Personal Geodatabase format. The Personal Geodatabase shall contain the Table A entities, attributes, and domain values for utulity features and the GPS Data Collector Setup Properties listed in Table B.

1.2.1 Metadata For each set of utulity pathways data using GPS, the Contractor shall complete all metadata elements marked mandatory as defined by the FGDC–STD-001-1998. Metadata shall be formatted and stored as an XML document that is compatible with the submitted Personal Geodatabase.

1.2.2 Accuracy Worksheets Calculation worksheets showing compliance with the National Standard for Spatial Data Accuracy (NSSDA) statement at the 95% confidence level, as required by paragraph 1.1.2, shall be submitted as an Excel (.xls) file. Examples of the Horizontal Accuracy Statistical Worksheet are given in FGDC-STD-007.3-1998, Appendix 3-B (informative) Horizontal Accuracy Computations, Tables 1 and 2.. The standard can be downloaded from a FGDC website: http://www.fgdc.gov/.

1.2.3 Data Compatibility with GeoBase Common Installation Picture Geospatial Personal Geodatabase data shall overlay on the installation’s most current GeoBase Common Installation Picture (CIP) provided by the Government in Personal Geodatabase Format The collected data will incorporate the datum and the coordinate and projection system of the Incirlik AB CIP, WGS 84, UTM Zone 36N, Transverse Mercator.

1.2.4 Quality Control. The Contractor shall utilize a topology build and clean routine and professional standards to assure the utulity pathways data for the submitted Personal Geodatabase have:

a. no erroneous overshoots, undershoots, dangles or intersections in the line work;

b. features snapped where applicable (for example, GPS_Path_Segment snapped to GPS_Manhole

c. continuous lines, with no pseudo-nodes ( Nodes should only exist where the attributes of a line change);

d. no sliver polygons;

e. all polygons completely closed and have a single unique centroid;

f. digital representation of the common boundaries for all graphic features that is coincident, regardless of feature layer.

1.3 Submittal of Deliverables Personal Geodatabase, metadata XML files, the quality control report and the calculation worksheets validating the NSSDA accuracy statement shall be submitted on CD-ROM storage media in accordance with the project specifications.

Government representatives must verify that Personal Geodatabase graphics and data tables can be visualized in the GeoBase prior to project closeout.

2.0 Applicable Documents and Standards. The following documents are hereby incorporated by reference. The Contractor shall comply with these documents during the performance of the contract requirements.

FGDC-STD-001-1998 - Content Standard for Digital Geospatial Metadata FGDC-STD-007.3-1998 - Geospatial Positioning Accuracy Standards Part 3: National Standard for Spatial Data Accuracy FGDC-STD-007.4-2002 - Geospatial Positioning Accuracy Standards Part 4: Standards for Architecture, Engineering, Construction (A/E/C) and Facilities Management Spatial Data Standard for Facilities, Infrastructure and Environment, Version 2.6

The contractor shall obtain and comply with any other applicable manuals not identified above that would be required to meet industry standards.

TABLE A

Entities, Attributes, and Domain Values for Recording Required

Water Utulities Feature Data

LIST TABLES THAT SHALL BE COMPLETED BY CONTRACTOR HERE

A.1.1 GPS_MANHOLE

A.1.1.1 Definition. An enclosed structure (manhole, handhole and pullbox). A butterfly layout is used that shows the floor and walls flattened out so that duct openings can be drawn on the walls. This must be represented as one polygon (one row in the table). The point is used to show the center of the manhole/handhole cover.

A.1.1.2 Geometry type. Site (Point).

A.1.1.3 Attributes.

Column Name

SDSFIE

Common

Name

Description

Data Type

Use

Domain Table

Table B Numbers GPS Data Collector Setup Properties

FOR ALL

FEATURE

TYPES

PDOP

(Position Dilution of Precision)

HDOP

(Horizontal Dilution of Precision)

Correction

Status

Receiver

Type

Date

Recorded

Time

Recorded

Update Status

Feature Name

Data File Name

Total Positions

Filtered Positions

GPS

Week

GPS

Second

IN

ADDITION

FOR LINE

FEATURES

Length (2D)

Length (3D)

Average Vertical

Precision

Average Horizontal Precision

Worst Vertical

Precision

Worst Horizontal

Line ID

IN

ADDITION

FOR POINT

FEATURES

Height

Vertical

Horizontal

Standard Deviation

Point ID