Temporary 2019 Map


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GPS on Bench Marks

This map will not be maintained. A new list and tracking map will be released in a few weeks.

Welcome to the GPS on Bench Marks Temporary 2019 Web Map. This provides a view of 2900 priority marks that were not collected in the 2018 list but can still help improve the Transformation Tool that will be created for NAPGD2022.

Geographic Location Search

Search by location or decimal coordinates (lat/lon). An X is placed at the top result with the specified km buffer. You can also place an X by right clicking at a location on the map.
Click magnifying glass on the map to search by PID

Symbology

Priority A mark with n observation(s) needed

Priority A Mark with n observation(s) requested

Priority B mark with n observation(s) needed

Priority B Mark with n observation(s) requested

Cluster with # marks

Priority mark clusters with # listed.


Notice:
Boundary representation is not necessarily authoritative

Help


Priority A Marks

Priority A are marks we need to either fill gaps or resolve conflicting existing information. These bench marks would provide the most value to improve geoid modeling with new observations.

Priority B Marks

Priority B are marks where we need to confirm the relationships suggested by other data in the area... We could build the model without them but we'll have more confidence in the geoid modeling if we have more data.

Help Notes:

  • Mouse wheel and buttons on top left of menu will zoom in and out of map
  • Hover over clusters to see extent of the cluster marks. Example with 487 marks below.
    Cluster extent
  • Click cluster to zoom in to larger scale of cluster area
  • Zoom level 9 is where there is no more clustering
  • Click markers to see information
  • Click on the search to search for a particular PID
  • Search for a location using left menu top icon

* Right click on map for context menu

Who To Contact


GPS on Bench Marks Team

  • Email the Team

NGS Information Center

  • Email : NGS Info Center
  • Telephone: (301) 713-3242
    ( Mon. – Fri., 9:00 a.m. – 4:30 p.m., EST )

Geodetic Advisor

  • Find Your Geodetic Advisor

Get a Datasheet by PID

Ex: HV3668 (two characters, 4 numbers)