Horizontal Control. Section Corner and quarter section corner locations must be referenced to the Xxxxxxx County Horizontal Control Network. As part of the design survey all Section Corners and Quarter Section Corners within the project area and others used for project control must be located, reference and state plane coordinates determined with GPS equipment. The coordinates and referenced ties shall be shown on the plans and the standard corner reference report submitted to the Kansas State Historical Society, the County Engineer, and cities project engineer within 30 days of the survey as required by state law. If a Xxxxxxx County Horizontal Control marker may be damaged by construction the County public works department should be notified prior to the bid letting.
Horizontal Control. A-E shall recover horizontal control monuments sufficient in density to enable A-E to search for, and to re-set, if required, monuments required to re- establish any boundary lines. A-E may be required to recover vertical control monuments, and if required, this will be detailed for a specific project. The type, character, and number of any monuments set shall be approved in advance and in writing by County and all monument materials shall be furnished by A-E or as directed by County. Copies of all raw data files shall be submitted to County. The basis of bearing and coordinate control shall be as detailed for a specific project.
Horizontal Control. Section Corner and quarter section corner locations must be referenced to the Xxxxxxx County Horizontal Control Network. As part of the design survey all Section Corners and Quarter Section Corners within the project area and others used for project control must be located, reference and state plane coordinates determined with GPS equipment. The coordinates and referenced ties shall be shown on the plans and the standard corner reference report submitted to the Kansas State Historical Society, the County Engineer, and cities project engineer within 30 days of the survey as required by state law. If a Xxxxxxx County Horizontal Control marker may be damaged by construction the County public works department should be notified prior to the bid letting. Plan Notes - Xxxxxxx County Control Bench Marks: Any Xxxxxxx County Benchmarks, Xxxxxxx County Horizontal Control monuments and any Section Corner and Quarter Section Corners within the area surveyed for the project must be conspicuously indicated on the plans. All bench marks and section and quarter section corners and property pins within the construction limits shall include a note for the re-establishment of the monuments. Exhibit A: Basic Services and Other Matters Quivira Road (151st Street to 000xx Xxxxxx) Xxxx xx Xxxxxxxx Xxxx Project No. TH-0495
Horizontal Control. Control shall be established along adjacent State Route and provide reference ties for control recovery. • Horizontal control shall be constrained to the Missouri Department of Transportation Real-Time Network. • Control shall be referenced to the North American Datum of 1983 (NAD83) (2011), Epoch 2010. • Orthometric heights shall be referenced to the North American Vertical Datum of 1988 (NAVD88) using the current GEOID18 model. • Control shall be referenced to the Missouri Coordinate System of 1983 in the west zone. • Control point shall consist of 5/8” x 24” rebar with a 2” aluminum cap containing a defined datum point. • 2D or 3D control points shall be placed a minimum 6 inches below the ground’s surface. If set in a cultivated field the point shall be placed 12” below ground’s surface. • Control shall be placed at the following locations and interval spacing:
Horizontal Control. 3.1 Search and reconnaissance for record and geodetic control points. Recover and verify previous control points set by agent and/or client. Set and maintain intermediate horizontal control points.
Horizontal Control. A-E shall recover horizontal control monuments sufficient in density to enable A-E to search for, and to re-set, if required, monuments required to re-establish any boundary lines. A-E may be required to recover vertical control monuments (if required, this will be detailed in the CTO for a specific project). The type, character, and number of any monuments set shall be approved in advance and in writing by COUNTY SURVEYOR and all monument materials shall be furnished by A-E or as directed by COUNTY SURVEYOR. Copies of all unadjusted field notes shall be submitted to COUNTY SURVEYOR. All material submitted shall be approved in writing by COUNTY SURVEYOR. The basis of bearing and coordinate control shall be as detailed in a specific CTO. DocuSign Envelope ID: 416E67DA-07D8-4514-8A5E-E2D2BDF7D4D8 In the case of Prado Dam Basin Property Acquisition Contract Task Orders, the basis of bearing and coordinate control shall be the California Coordinate System of 1927 (NAD 27), Zone 6, and the vertical control shall be based on the Orange County Surveyor 1976 adjustment, as previously established and available in a manual entitled “Xxxxx Basin Horizontal and Vertical Control” available at the County Surveyor’s office. All found or set monuments shall be tied to the established control system as cited above.
Horizontal Control. Each horizontal control point shall be plotted on the map manuscript within the coordinate grid in which it should lie to an accuracy of 1/50 of an inch of its true position for the point. PLANIMETRIC FEATURES Ninety percent (90%) of all planimetric features, which are well defined on the photographs, shall be plotted so that their position on the manuscript shall be accurate to within at least 1/40 of an inch of their true coordinate position. None of the features shall be misplaced on the manuscript by more than 1/20 of an inch from their true coordinate position. Partially obscured planimetric details that may not meet this requirement will be shown by dashed lines where possible. Planimetric features totally obscured will not be shown. SUMMARY OF ACCURACY STANDARDS The following table specifies the level of E-TOPO® map accuracy (NMAS) to be expected for well defined (distinct) features as viewed in the stereomodel when ground control accuracy requirements are met as specified in Section 3.1.2. Summary Of National Map Accuracy Standards Horizontal Scale Feature Location Contour Interval Vertical (90%) Spot Elevations (90%) 1”=20’ 0.5’± 1’ ½ ft ¼ ft 1”=40’ 1.0’± 2’ 1 ft ½ ft 1”=50’ 1.25’± 2’ 1 ft ½ ft 1”=100’ 2.5’± 2’ 1 ft ½ ft 1”=100’ 2.5’± 5’ 2 ½ ft 1 ¼ ft 1”=200’ 5.0’± 2’ 1 ft ½ ft 1”=200’ 5.0’± 5’ 2 ½ ft 1 ¼ ft well defined (distinct) features as viewed in the stereomodel QUALITY CONTROL It is your responsibility and / or the subsequent users to perform field measurements and sufficient quality control (ground truthing) to determine suitability and acceptance of said mapping for its intended use, and assume all risk and liability in connection therewith. Eastern Topographics’ liability is hereby limited to warranty and accuracy of said mapping within the expense of flying, photography, and compilation. Any errors or omissions, as determined by field editing will be corrected by Eastern Topographics at no additional expense. Failure to notify Eastern Topographics within ninety (90) days from delivery of any errors and / or omissions shall be deemed an acceptance of the map and any claims as a result of such defect are waived. It is imperative that our mapping be field tested prior to any use of basemapping for design or construction.
Horizontal Control. The CONSULTANT shall establish necessary random horizontal control using Global Positioning Systems (GPS) or conventional optical traversing methods. Horizontal control values will be based upon the Indiana State Plane Coordinate system, East Zone, North American Datum 1983. Horizontal control points will be generally spaced at approximate 500 foot intervals.
Horizontal Control. Xxxxxxx shall provide a list of horizontal control points with coordinates, descriptions, station and offset. Horizontal control will be referenced to the Modified State Plane using known land survey monuments provided by the City of Grand Island.
Horizontal Control. A system located in the field that provides a point of horizontal reference for all Work described in the Task Order.
