Survey Control. Such general reference points and bench marks on the building site as will enable the Contractor to proceed with the Work will be established in the drawings and specifications. If the Contractor finds that any previously established reference points have been lost or destroyed, Contractor shall promptly notify the Division Manager.
Survey Control. 6 Developer shall establish Project survey control by utilizing those primary horizontal control 7 points depicted on the Results of Survey for Project No. 202L MA 000 H5439, by Xxxxxxx 8 Consultants, included in the RIDs. Developer shall establish secondary survey control points 9 throughout the Project alignment at intervals not to exceed 1,000 feet. These points must 10 include horizontal and vertical data sufficient to control construction. These survey control points 11 and bench marks must be shown on the Plans and expressed in northing, easting, elevation, 12 station, and offset.
Survey Control and setting out of the works
Survey Control. The CONSULTANT may be requested to reestablish project survey controls. The CONSULTANT may be requested to provide project surveying to fulfill project requirements.
Survey Control. The Developer shall provide all property corners and street centerline stakes, and shall provide reasonable and necessary opportunities and facilities for setting points and making measurements. Construction shall not commence until the Developer has made provision to establish such points and measurements to the District's satisfaction. The Extension shall conform to such points and instructions. The Developer shall preserve bench marks, reference points and stakes, and, in case of destruction, shall be charged for any resulting expense and shall be responsible for any errors that may be caused by their absence or disturbance.
Survey Control. Unless otherwise provided in the Contract, the Design-Builder will provide engineering surveys and establish those survey control points necessary to lay out the Work. The Design- Builder must: (1) lay out the Work, unless otherwise specified in this Contract, (2) protect and preserve the established survey control points, and (3) make no change or relocation of the survey control points without the prior written approval of the City. The Design-Builder must report to the City whenever any survey control point is lost, destroyed, or requires relocation. At no additional cost to the City, the Design-Builder shall be responsible for the accurate replacement or relocation of survey control points lost or destroyed without City approval. Such replacement must be by a professional land surveyor licensed by the State of Oregon.
Survey Control. Contains Surveyor’s notes and benchmark information, control data, curve and line tables, and plan showing control points and start/end construction labeled in cyan and right-of-way lines labeled in proper colors per City of Lancaster standards as applicable. (1 Sheet)
Survey Control. Simultaneous to the LiDAR data collection mission, QSI will conduct a static (1 Hz recording frequency) survey of the horizontal and vertical positions of two or more survey control dual-frequency DGPS base stations established at monuments with known coordinates. Maximum baseline lengths between control points and the aircraft GPS do not exceed 24 kilometers (13 nautical miles). After the static GPS data have been collected, the files will be processed using the Online Positioning User Service (OPUS). Multiple sessions will be processed over the same monument to confirm antenna height measurements and reported OPUS position accuracy. Control monument locations will be certified by a QSI Washington PLS. Q uality control real-time kinematic (RTK) ground check survey data will be collected within the project area, with an established Root Mean Square Error (RMSE) of less than 2 cm. Absolute laser spot accuracies will be statistically analyzed based upon an adequate sample (500 per 50,000 acres, depending on access and GPS conditions within study area) of well-distributed RTK ground survey points on open, bare earth surfaces with level slope. Deliverables Deliverables will match standard for Puget Sound LiDAR Consortium: Report of Survey Text report that describes survey methods; results; vendor's accuracy assessments, including internal consistency and absolute accuracy; and metadata .pdf, .doc, or .odt format Aircraft trajectories (SBET files) Aircraft position (easting, northing, elevation) and attitude (heading, pitch, roll) and GPS time recorded at regular intervals of 1 second or less. May include additional attributes. ASCII text format All-return point cloud List of all valid returns. For each return: GPS week, GPS second, easting, northing, elevation, intensity, return#, return classification. May include additional attributes. No duplicate entries. ASCII text and LAS version 1.2 format 1/100th USGS 7.5-minute quadrangle (0.75 minute by 0.75 minute) tiles Ground point list List of X,Y,Z coordinates of all identified ground points. ASCII text. 1/100th USGS 7.5-minute quadrangle (0.75 minute by 0. 75 minute) tiles Ground surface model Raster of ground surface, interpolated via triangulated irregular network from identified ground points. No unavoidable point misclassification ESRI floating point grid, 3 ft cell size, snapped to (0,0), 1/4th USGS 7.5-minute quadrangle (3.75 minute by 3.75 minute) tiles First-return (highest-hit) surface model Raster of ...
Survey Control. WG will establish semi-permanent primary and secondary control points necessary for the topographic and right of way surveys based upon the North America Datum of 1983 and the Caltrans High Accuracy Reference Network (XXXX), NAD 83 1991.35 epoch or the Continuously Operating Reference Stations (CORS). Prior to the start of field work, WG will coordinate with Caltrans to determine the preferred horizontal control basis. The coordinate system used will be the California Coordinate System 1983, Zone 5 (CCS83) Elevations will be based upon the North American Vertical Datum of 1988 (NAVD 88). WG will provide ground control for the Aerial Map described above, and all control for the “densification” of the aerial map described below. The project control will be “tied” to NAD 83 with the coordinate values of the control on the ground. Combined factor to convert to grid will be provided. All mapping products will be on the ground. All control points will be durable and identifiable. WG will establish semi-permanent primary and secondary control points throughout the project necessary for the topographic and right of way surveys. After meeting with Caltrans to discuss the control scheme, the control can be based on:
1) The North America Datum of 1983 and the Caltrans High Accuracy Reference Network (XXXX), NAD 83 1991.35 epoch or the Continuously Operating Reference Stations (CORS).
2) The horizontal coordinate system will be the California Coordinate System 1983, Zone 5 (CCS83)
3) Elevations will be based upon the North American Vertical Datum of 1988 (NAVD 88). According to Xxx Xxxxx, PLS of Caltrans, there is only NAD27 control near the site. Therefore, we will utilize the following NGS control points to provide primary control for the site: • NGS Control Point HPGN D CA 05 HL (FV2066) near State Highway 227 and Xxxxxxx Canyon on the 2011 epoch using NAD 83 (feet) coordinate values. • NGS Control Point SBP C (FV4511) along the south fence at the San Xxxx Obispo Airport on the 2011 epoch using NAD 83 (feet) coordinate values. The vertical datum will be NAVD 88. Sufficient control points will be established, with some set in strategic locations to survive until the start of the construction phase, roughly five years into the future. The survey control points will be compiled onto the Base Map described below and the survey base map deliverable will include a Survey Control Sheet showing the location and coordinates of these control stations. The control sheet will ...
Survey Control. The horizontal control used for the survey shall be based on the Washington State Plane Coordinate System – North Zone. The vertical control used for the survey shall be based on the North American Vertical Datum of 1988 (NAVD-88) The location and elevation of the monuments and benchmarks used shall be referenced on the survey.
