1. The OPUS-DB Experience User and NGS perspectives

2. How to Access NSRS 1)Passive monuments –Datasheets http://geodesy.noaa.gov/cgi-bin/datasheet.prl 2)Active GPS –CORS data http://geodesy.noaa.gov/CORS –OPUS processing http://geodesy.noaa.gov/OPUS

3. How to Maintain NSRS 1)Passive monuments –Add observations via BLUEBOOKING –Online recovery recvy_entry_www.prl –Online GPS observations via OPUS-DB 2)Active GPS –Join Cooperative CORS http://geodesy.noaa.gov/CORS/Coop/

4. Why reinvent bluebooking?

5. GPS dataObservation log description formphoto(s) NGS website: OPUS-DB DATASHEET NGS magic OPUS-DB OBSERVATION DATA STREAM

6. Simple is better! A comparison:Files used: (create, sort, maintain) Required Metadata (input) Programs used: (learn, run, maintain) BLUEBOOK16 files   378 elements     26 programs OPUS-DB 2 files  (GPS data + photo) 15 elements  1 program  (internet browser)

7. The OPUS-DB Experience 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves LIVE!

8. The OPUS-DB Experience 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves LIVE! no internet

13. The OPUS-DB Experience 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves

16. The OPUS-DB Experience 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves LIVE!

17. The OPUS-DB Experience 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves LIVE! no internet

27. The OPUS-DB Experience 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves

35. 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves The OPUS-DB Experience LIVE!

36. 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves The OPUS-DB Experience LIVE! no internet

38. The OPUS-DB Experience 1. user registers 2. NGS approves 3. user uploads 4. NGS reviews 5. user approves 6. NGS approves

42. Bench mark elevation retained Position accuracy improved 95 feet! One more tie between GRS80-NAVD88.

43. OPUS-DB benefits Data submittal –Faster –cheaper Consistent data processing Improve maintenance of NSRS –Add GPS on bench marks –Archive PLSS corners?

44. GPS data only PAGES software only No direct tie to adjacent monuments No redundancy Reduced oversight Idiot-proofing? Field logs are not archived OPUS-DB limitations

45. OPUS-DB data quality Registered, trained users 4+ hours of static GPS OPUS error checking NGS reviews each submittal Datasheet includes: –“Caveat emptor” warning –Datasheet includes DQA statistics –Agency attribution Coordinates: first, best, average

46. OPUS »$$$ receiver, hours of data OPUS-DB share results »$$$ receiver, hours of data, share results OPUS Projects »Multiple »Multiple $$$ receivers, share results OPUS Rapid Static minutes »$$$ receiver, minutes of data OPUS GIS »¢¢ receiver »¢¢ receiver, minutes of data Many Flavors of OPUS Planned