Maintained by: DC GISOwner: DouglasCountyCO_GISServicesSource: National Geodetic SurveyEdit Frequency: NoneSummary: Data Including Feature Layer: NGS Survey Control Monuments. Open data. 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.
https://wiki.creativecommons.org/wiki/public_domainhttps://wiki.creativecommons.org/wiki/public_domain
This map depicts the locations of survey monuments within and surrounding the City of Salinas, Monterey County, California. Included are National Geodetic Survey (NGS) and city maintained monuments datasets. See NGS website for additional details on NGS monuments. This is not a comprehensive dataset for all survey monuments within the city, additional sources of monuments may be present within the city. City maintained monuments may not be included in the NGS dataset. This service was created by a member of the GIS team in 2017.
Geospatial data about Houston, Texas NGS Monuments. Export to CAD, GIS, PDF, CSV and access via API.
This is a vector point dataset that represents survey monument features within Great Smoky Mountains National Park. It provides useful information for park staff and who are working on construction projects or boundary management activities. It also provides useful information for the public, such as boundary monument location information for state-licensed surveyors working on property surveys adjoining NPS lands. The NPS Monuments layer was initially created on 08/06/2010 using ArcMap 9.3 by generating point features from coordinate pairs provided by Denver Service Center (DSC) survey project deliverable files. Scanned monument record sheets or survey plats are hyperlinked to each point feature. Detailed attributes include point source, coordinate values, expected accuracies and date/time information. The NGS Monuments layer is a subset of the National Geodetic Survey monuments layer. The Boundary Markers layer is managed and maintained by the Great Smoky Mountains National Park Land Surveyor. The goal of this dataset is to provide survey information to help reduce redundancies and costs for construction projects, boundary surveys and boundary management.The corresponding Integration of Resource Management Applications (IRMA) NPS Data Store reference is Great Smoky Mountains National Park Monuments.
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.
This feature class is maintained to keep construction, mapping and all city services in and adjacent to the city on the same vertical datum. Thus minimizing mistakes or conflicts in construction or maintenance of the infrastructure of the city. This feature class represents the cities vertical control network which was started approximatley in 1971. The oringinal bench mark used to start the network was a NGS (Nationa Geodetic Survey) monument located in the northwest part of the city (Stapleton Airport/Peoria and Smith). Level loops and runs were added and extended as the city grew. Which also incorporated more NGS monuments. The datum used when the program started was NGVD (National Geodetic Vertical Datum) of 1929 . In June of 2006 the city converted from NGVD 1929 to NAVD (North American Vertical Datum) of 1988 using Corpscon 6.0.1 and the Geoid 2003. This network has been successful and should be maintained until a improved alternative can be utilized.
Geodetic control monuments GPS'd and inventoried by the Stark County Engineer (SCE). SCE locates these structures to make their locations available to surveyors and the public. Each record includes an attachment that displays attribute data in a report format. The report also includes a picture of the original survey. Geodetic control monuments are permanent structures that provide a reference point to aid surveyors the means to obtain accurate horizontal and vertical measurements. These monuments were established and maintained by the National Geodetic Survey (NGS).
This dataset represents the geographic position of geodetic control as maintained by the National Geodetic Survey that have been placed in the field and used as control points by land surveyors. Includes some monuments within a 5 mile buffer from the County border. This file is not actively updated by County staff and was last compiled on December 9, 2014. More detailed information can be obtained from the NGS Datasheet Page (http://www.ngs.noaa.gov/cgi-bin/datasheet.prl).
Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
License information was derived automatically
With the continued risk of flooding in Southeast Texas, Lamar University is working to help the region improves its resiliency during large-scale flooding events. Real-time water stage, elevation, and coordinates in different points of a watershed are essential agents in flood monitoring and mapping. It also helps researchers with hydrological modeling. Southeast Texas and its watersheds and sub-watersheds were subjected to gathering data in order to monitor and map water movements. This data includes the precise positioning of 74 flood-level networked sensors installed in the first phase of this study throughout 7-county regions spanning nearly 6000 square miles in Southeast Texas to achieve the most accurate horizontal and vertical results, 0.4 in. accuracy and lower. Positions of the sensors and their surrounding critical points, including the node, bottom of the node, top of the bank, bottom of the ditch, bottom of the bridge's deck, and the center and edge of the roads, have been measured. Also, the relatives between these points are of significance and were collected. Each site's thresholds have been established with the aid of this data. Thresholds, real-time relative elevation data of these sensors, and their critical surrounding points are being transmitted to dashboards related to road closures or modeling efforts of mitigation decision-makers, emergency managers, and the public. Furthermore, in the project's next phase, this data was used to propagate flood hydrological models in Southeast Texas watersheds and sub-basins. Furthermore, some important descriptions of the water bodies where the sensors are located have been considered. Moreover, some information regarding the validation of results and also surveying operations and their most accurate benchmarks are available. Real-time kinematic (RTK) surveying technology concerning the Global Navigation Satellite System (GNSS) has been used as an accurate, rapid, and relatively low-cost surveying method. A ZIPLEVEL PRO-2000 High Precision Altimeter and a Trimble handheld GEOX7 using RTK were applied in this regard. In order to achieve the most accurate results, the GPSPathfinder Office software was used to post-process raw materials collected from the field. CORS NAD 1983 (2011) projection for the differential correction file during postprocessing was used as the geographic coordinate system. The North American Vertical Datum of 1988 (NAVD 88) is the vertical control datum. GEOID18 is intended for use with coordinates in the North American Datum of 1983 (2011) [NAD 83 (2011) epoch 2010.00]. It provides orthometric heights consistent with the North American Vertical Datum of 1988 (NAVD 88). ZIPLEVEL PRO-2000 was used to validate and double-check the measured elevation by Trimble. Also, we measured the NGS monument coordinates and elevations near each site and compared them to the published NGS reports hence finding the most accurate base providers to use as a benchmark in postprocessing. This project involves the Flood Coordination Study team at Lamar University, Center for Resiliency, in collaboration with various entities such as the U.S. Department of Homeland Security Science and Technology Directorate, the Southeast Texas Flood Control District, and various other regional agencies, municipalities, and industries. We hope this data works for researchers and hopefully they find it useful for their studies.
This layer represents the location of high-order geodetic monuments set by Prince William County. These monuments are placed throughout the County and are used as anchoring points for land surveyors. There are 17 recorded points in the data layer. Its attribute information includes fields such as ownership, latitude, longitude, elevation, and station name for the particular monument on the day it was set. The 17 Monuments are B Order and set by Prince William County in 2001. They are Blue Booked with the National Geodetic Survey (NGS) within the National Ocean and Atmospheric Administration (NOAA) the detailed information and monument data sheets can be found at - https://geodesy.noaa.gov/datasheets/ . The NGS monument designations are PW01 through PW17.
Not seeing a result you expected?
Learn how you can add new datasets to our index.
Maintained by: DC GISOwner: DouglasCountyCO_GISServicesSource: National Geodetic SurveyEdit Frequency: NoneSummary: Data Including Feature Layer: NGS Survey Control Monuments. Open data. 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.