Send questions, comments or data problems to Andrew Iler.
The National Geodetic Survey's Online Positioning User Service (OPUS) provides access to high-accuracy National Spatial Reference System (NSRS) coordinates. Pima County uploads GPS data and OPUS returns NSRS positions as "OPUS Solutions".
Pima County Static OPUS Solution Control Points are random points proximal to section corners. This page displays the survey section OPUS Control Points Map and each control point's occupation sheet and OPUS Solution Report.
All horizontal data is based on static observations of two or more hours. OPUS solution reports represent the results of the said observations. These control points are, at best, third order and are not a horizontal control point as defined by ARS 33-133. A monument existed at the time the "OPUS" solution position was determined. The monument that existed was in the proximity of, and is NOT an aliquot corner as described in the Public Land Survey System, although OPUS Control Point identifiers name reference section corner numbers as defined by this township corner chart. The OPUS Solution Reports were acquired via the National Geodetic Survey's Online Positioning User Service (OPUS).
You can view the OPUS Control Point information two ways.
OPUS Control Points PimaMaps Map
- Before using PimaMaps make sure to read the Disclaimer
- For more information on PimaMaps, click on PimaMaps - Main. Here you will find the Help section, and the Quick Start Guide for tips on how to use the application, plus FAQ.
- Begin, click on the hyperlink PimaMaps-Survey Map.
- A map will open with a panel on the left side of the screen, scroll down the panel to Control Points, click + toggle button to expand the options, check box for "PC OPUS Control Points" item, Zoom in to view the “Map Layers”
- Double-click on the white title bar above the map to open the toolbar, or click on the Wrench icon in the upper right corner of the map.
- Use the mouse to navigate around the map, left click and hold mouse to move map in the direction desired and release.
- Zoom in, use the wheel on the mouse, move the wheel downward to magnify map until you reach the specific section of road or desired view.
- Zoom-out, move the wheel upward to reduce map image to desired view.
- Hover over the desired road or section, click on it to select it, and a dialog box opens.
- Dialog box will open giving the Control Points: ID, Latitude, Longitude, with three hyperlinks: “More Information”, “View Additional Details” or "Edit Features".
- The hyperlinks will provide the following information:
- More Information will list the Static OPUS Control Point for the selected area or road.
- View Additional Details will give additional information for the selected area or road.
- Edit Features option is not available.
- Any issues contact Maps and Records at (520) 724-6410.
- Go to the map hyperlink above to view map.
OPUS Control Point Document Search
To learn about options, queries, and viewing documents, see OnBase, Document Management System Help or contact Tom Reu. When viewing a control point document, you can click on the "MAP" button to zoom to that document's point on PimaMaps map.