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.

New Jersey State Geodetic Control Monuments

Horizontal Datum: North American Datum 1927 (NAD27) in ft.

Vertical Datum: National Geodetic Vertical Datum 1929 (NGVD29) in ft

The Geodetic Database contains information on permanent geodetic control marks located in Minnesota or just outside its boundaries. Permanent geodetic control marks are established for the purpose of providing precise horizontal and vertical control positions for the registration of surveying and mapping activities in the local area. Information about the location of an object based on its geodetic location locates that object in a worldwide geographic information system. The marks have unique identification and year established stamped on the monument disk, usually an 89 mm (3.5 inch) diameter brass or aluminum disk. Monuments consist of material (concrete or metal) that is meant to stay in place for 50 to 100 years or more, and have little or no movement due to frost action or activity near the monument. The marks have been established by all levels of government in Minnesota, and they are referenced to the National Geodetic Reference System (NAD 1927, NAD 1983, NGVD 1929, and NAVD 1988). The Federal Government supports monumentation at the state level by providing technical expertise, adjustments of the data, and maintenance of the National Geodetic Reference System through its State Advisor Program.

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.

Mascot geodetic control monuments for BC. Geodetic Control Monuments are a network of interconnected markers in the ground which have accurately determined coordinates, and/or elevations. They are fixed points on which to spatially reference surveys, mapping, aerial and satellite imaging, etc

This dataset provides information about the position, position accuracy, mark name, mark type, condition and unique four letter code for geodetic marks in terms of a New Zealand's official geodetic datum.

The dataset only contains marks that are within the New Zealand mainland and offshore islands. These positions have been generated using geodetic observations such as precise differential GPS or electronic distance and theodolite angles measurements. The positions are either 2D or 3D depending of the availability of this measurement data.

The source data is from Toitū Te Whenua Land Information New Zealand's (LINZ) Landonline system where it is used by Land Surveyors. This dataset is updated daily to reflect changes made in the Landonline.

Accuracy

Geodetic marks with a coordinate order of 5 or less have been positioned in terms of NZGD2000. Lower order marks (order 6 and greater) are derived from cadastral surveys, lower accuracy measurement techniques or inaccurate historical datum transformations, and may be significantly less accurate.

The accuracy of NZGD2000 coordinates is described by a series of 'orders' classifications. Positions in terms of NZGD2000 are described by three-dimensional coordinates (latitude, longitude, ellipsoidal height). The accuracy of a survey mark is indicated by its Order. Orders are classifications based on the quality of the coordinate in relation to the datum and in relation to other surrounding marks. For more information see

Note that the accuracy applies at the time the mark was last surveyed. Refer to the web geodetic database for historical information about mark coordinates.

Note also that the existence of a mark in this dataset does not imply that there is currently a physical mark in the ground - the dataset includes destroyed or lost historical marks. The geodetic database provides more information on the mark status, valid at last time it was visited by LINZ or a maintenance contractor.

This data contains a set of geodetic control stations maintained by the National Geodetic Survey in the state of Rhode Island. 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.

This dataset represents all geodetic control stations throughout the state of Rhode Island. 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 data set depicts the estimated horizontal locations of some 1,700 + City of Long Beach Survey Benchmarks. A survey benchmark is a permanent marker established by a land surveyor to provide elevation reference to a defined vertical datum. More precise locations are provided in the descriptions of the individual benchmarks contained within the Survey Benchmark Book published on the City website (longbeach.gov/pw/resources/maps/). The elevations shown therein are based upon measurements made through conventional differential leveling methods. The latest comprehensive inventory, measurement and adjustment of citywide benchmarks was made in 1985. The network is referenced to the National Geodetic Vertical Datum of 1929 (NGVD29) and is based upon an elevation of +11.129 feet on the tidal benchmark named “Tidal 8” located at Berth 69 of Municipal Pier No.1 in the Los Angeles Outer Harbor. The intention of the benchmark list is to provide vertical elevation data to the public on city-maintained benchmarks. As with all survey data, care should be taken to verify the benchmark elevations by measuring multiple benchmarks. The horizontal locations contained in the data set are only approximate and intended exclusively for geographical representation for project planning purposes. Please report any inconsistencies in this data to the Surveying department at the City of Long Beach by phone at (562)570-3093 or by email at CLBSurvey@longbeach.gov.For more information, see Surveying Practice - California Business & Professions Code, Chapter 15; Article 5; Section 8771.”

Alberta Survey Control Marker (ASCM) index maps are a graphical representation of the provincial spatial referencing system. The index maps display the location of integrated ASCMs in relation to various base mapping features including the Alberta Township System, hydrography, geo-administrative boundaries (Municipal and Canada lands), road networks, railways, and airports. In addition, index maps covering urban areas include street names, networks, and major facilities (schools, hospitals, etc.). Only those markers with a marker condition of GOOD or ANOMALOUS are displayed on the index maps. ASCM index maps are available from https://www.alberta.ca/geodetic-control-unit.aspx#toc-3.

The Nova Scotia Control Monuments (NSCM) dataset is updated and maintained from ongoing observations on survey monuments. The NSCM indicates the locations of physical survey monuments in Nova Scotia. Information includes the Station Number, Station Name, Station Description, Monument Type, Monument Status, Status Date, Construction Date, GPS suitability and general comments.

Discover Panama's Geodetic GPS NetworkThis interactive map pinpoints the exact locations of Panama's Geodetic GPS Network. Whether you're calibrating your GPS equipment or setting up a GPS Base receiver, this map is your essential tool.What is a Geodetic Network?A geodetic network is a precisely measured network of points used as a reference for surveying and mapping. These points, marked by plaques, are crucial for accurate geographic positioning.How it Works:Historically, geodetic networks were established through intricate triangulation methods involving angle and distance measurements. Today, advanced technologies like satellite geodesy and precise instruments like theodolites and tacheometers are employed to ensure the highest level of accuracy.Explore the Map:Zoom in to view specific locations and their details.Click on a marker to learn more about the geodetic point.Use the search bar to find a specific location.By utilizing this map, you can gain valuable insights into Panama's geodetic infrastructure and make informed decisions for your GPS-related activities.