Closed bbest closed 2 years ago
Hey @bbest. Question on what to do for polygons that extend far beyond the calcofi study area. The biggest example here is with territorial and non-territorial waters. I have found these polygons no problem (available here and here), but these polygons extend way beyond the calcofi zone, which is obviously too much. Should I clip the waters polygons to the boundary of the calcofi study area that you already found?
Hi @superjai, please read the Overlap Strategy heading above in this issue. We don’t want to clip, just retain any features that intersect. I’d start by downloading any relevant ones into Google Drive. Then run through intersecting, ideally with an R script or similar.
Please be sure to include a README with source URL in the Gdrive folders and check Task boxes as you go. Thanks!
Hey @bbest - I have gotten as far as I can with this one and I have sent emails out where I have had issues. All of the requested datasets have been saved to the google drive, with the following exceptions:
Response from Erin: I was looking at this data (https://www.boem.gov/oil-gas-energy/mapping-and-data/pacific-cadastral-data) and was thinking of:
Q: What about the terrestrial layers, like Counties and Ports?
See https://ohi-science.org/pages/create_regions.html for ArcGIS Python script to handle this.
All the data layers have now been grabbed with the exception of "CCE biological sampling areas", which is unavailable. Here's the note from Chris Harvey, NOAA scientist, who generated that sampling area map:
JAI: In the following report for which you were the lead, I was hoping to get the shapefiles you used to generate two of your figures: https://www.pcouncil.org/documents/2020/02/g-1-a-iea-team-report-1.pdf/ A. I was hoping you could direct me to the shapefiles used in Figure 2.1.a. for "oceanographic sampling locations". B. Additionally, I was looking for the shapefiles used in Figure 2.1.c for "biological sampling areas".
CHRIS: That Figure 2 is the worst...I basically made those panels myself in Powerpoint with some screen captures and crude artwork, and frankly my computer skills are pretty limited, so there aren't any shape files per se. I'm happy to share those images with you but they're terrible and a bit out-of-date, and they've been on my list of things to improve for several years.
Ok, this is great Jai! Thanks for gathering all the data. We'll leave out the CCE biological sampling areas per Chris' comment.
Locate spatial data from Erin's list, download into Google Drive into
areas-of-interest
folder under data/, and read into R (e.g. withsf::read_sf()
README.md
with:I think these are the main ones -- added some specificity below:
CalCOFI
International
Federal
[x] Sanctuaries: sanctuaries.geojson
[x] IEA California Current
[x] Freshwater ecoregion - SoCal Bight
[ ] CCE biological sampling areas (Central CCE, Southern CCE)- https://www.pcouncil.org/documents/2020/02/g-1-a-iea-team-report-1.pdf/
[x] Federal waters: 3-12nm (see image on page 16 http://www.opc.ca.gov/webmaster/ftp/pdf/docs/Documents_Page/Noteworthy/Overview_Ocean_Coastal_Laws.pdf)
[x] EEZ federal: 3 (12?) to 200 nm (see MarineCadastre.org) OR (see image on page 16 http://www.opc.ca.gov/webmaster/ftp/pdf/docs/Documents_Page/Noteworthy/Overview_Ocean_Coastal_Laws.pdf)
BOEM
State
County/local
Overlap strategy
We don't need to keep features that do not intersect CalCOFI study area, eg Sanctuaries on the East Coast, but we don't want to clip intersecting features to the study area, ie keep the original polygon shape. So technically, that means keep all
sf::st_intersects()
(notsf::st_intersection()
).Motivation
Goal: Get AOIs that intersect CalCOFI study area for extraction of key variables over time, a la ...
https://shiny.ecoquants.com/calcofi/