NMucci1
commented
6 days ago Notes from Josh:
- 2018 re-stratified quahog / clam strata
- 2024 redesign of the the scallop survey strata to align with SAMS (panel review)
- Using GRTS instead of stratified random sampling now
- Display quahog / clam strata together (two peas in one pod)
- NEFSCspatial GitHub repo has some survey strata data
- Clam survey strata get adjusted annually to remove untowable bottom (but otherwise rarely updated)
- Caused issue with analyses (so many holes), but Dana has a smoothed version
- Ideally only want 1 polygon per stratum
- Useful info from developers for survey planning:
- Cable locations, surveying for cables (big one)
- Where they'll be doing construction in a given season in the immediate future
- If a station falls in a WEA we’ll check it out, if we can sample within 1 to 3 miles then that’s fine; otherwise choose an alternate station
Data owner / manager
Project / program
Survey Mitigation
Data location
some of them might be on github repo (NEFSC spatial), but they may not be the most up to date. Dana got them from people in her group. Dana will send new shapefile for Ocean Quahog that doesn't have rough edges. She will send the updated Scallop shapefile.
What is the type of data?
Shapefile
If Other, please specify data type
5 separate files (shrimp, clam, quahog, scallop, shellfish (historical))
Metadata
Program description: see InPort Atlantic Surfclam and Ocean Quahog Survey | InPort, Sea Scallop Survey | InPort, Northern Shrimp Surveys | InPort Frequency of update: Clam strata got adjusted a little to remove untowable bottom around 2018 or 2019. The scallop strata recently got adjusted. However, generally strata aren’t updated year to year. Where is metadata currently stored? InPort
Any data attributes that are non-spatial (e.g., stratum id)?
Yes
If Yes, please explain
-there are some, Dana does not have a README file. The data attributes are generally strata ID, depth, area. Some data attributes are unclear.
Spatial reference / coordinate system
all datasets Geographic Coordinate System: NAD 1983 WKID: 4269 Authority: EPSG Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D North American 1983 Spheroid: GRS 1980 Semimajor Axis: 6378137.0 Semiminor Axis: 6356752.314140356 Inverse Flattening:298.257222101
Geographic extent
Ocean Quahog UPDATED Top: 42.144500 deg Bottom: 36.505500 deg Left: -74.934500 deg Right: -66.482500 deg
Surf Clam Top: 42.144500 deg Bottom: 36.499500 deg Left: -75.959500 deg Right: -66.933500 deg
Shrimp Top: 44.087617 deg Bottom: 41.084764 deg Left: -70.681519 deg Right: -67.999412 deg
Shellfish (historical) Top: 42.168171 deg Bottom: 35.501423 deg Left: -75.959816 deg Right: -65.899445 deg
Measurement system
non spatial data attributes in meters
General description of project purpose and summary
-until recently there were strata for all shellfish, in 2018 they remade them to be separate strata (clam, quahog, scallop). This year the scallop survey was redone, Dana will send new file. Surf clam and quahogs are sampled together. See InPort for background information for each program.
Wind developer activity information
-Exact cable locations would be helpful to know, especially since shellfish surveys require dredging and could damage cables. Location of construction activity and structures in a given season would be helpful to know for survey planning.