the opus-db experience user and ngs perspectives
TRANSCRIPT
The OPUS-DB Experience
User and NGS perspectives
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
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/
Why reinvent bluebooking?
GPS data Observation log description formphoto(s)
NGS website:
OPUS-DB
DATASHEET
NGS magic
OPUS-DB OBSERVATION DATA STREAM
Simple is better!
A comparison: Files used:(create, sort,
maintain)
Required Metadata
(input)
Programs used:(learn, run, maintain)
BLUEBOOK
16 files
378 elements
26 programs
OPUS-DB2 files
(GPS data + photo)
15 elements
1 program
(internet browser)
The OPUS-DB Experience
1. user registers2. NGS approves
3. user uploads
4. NGS reviews
5. user approves
6. NGS approves
LIVE!
The OPUS-DB Experience
1. user registers
2. NGS approves3. user uploads
4. NGS reviews
5. user approves
6. NGS approves
The OPUS-DB Experience
1. user registers
2. NGS approves
3. user uploads4. NGS reviews
5. user approves
6. NGS approves
LIVE!
The OPUS-DB Experience
1. user registers
2. NGS approves
3. user uploads
4. NGS reviews5. user approves
6. NGS approves
1. user registers
2. NGS approves
3. user uploads
4. NGS reviews
5. user approves6. NGS approves
The OPUS-DB Experience
LIVE!
The OPUS-DB Experience
1. user registers
2. NGS approves
3. user uploads
4. NGS reviews
5. user approves
6. NGS approves
Bench mark elevation retained
Position accuracy improved 95 feet!
One more tie between GRS80-NAVD88.
OPUS-DB benefits
• Data submittal– Faster– cheaper
• Consistent data processing• Improve maintenance of NSRS
– Add GPS on bench marks– Archive PLSS corners?
• 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
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
• OPUS» $$$ receiver, hours of data
• OPUS-DB
» $$$ receiver, hours of data, share resultsshare results• OPUS Projects
» MultipleMultiple $$$ receivers, share results• OPUS Rapid Static
» $$$ receiver, minutesminutes of data• OPUS GIS
» ¢¢ receiver¢¢ receiver, minutes of data
Many Flavors of OPUS Planned