I'm looking to add a layer of oil and gas pipelines for the state of Oklahoma, or maybe just a few counties of Oklahoma. The NPMS public viewer (link below) seems to only have major pipelines, when you zoom in they disappear,
and there is no GIS data.
https://pvnpms.phmsa.dot.gov/PublicViewer/
It's just a bunch of image tiles, not really a vector layer.
I always suggest folks start with OpenStreetMap. You'd be surprised what dedicated hobbyists will take the time to map out, sometimes in incredible levels of detail. It's not likely to be comprehensive, but it's somewhere to start, and it's a dataset that you could easily add information to.
Here's a query to find all the pipelines in Oklahoma. You can export to GeoJSON from here.
https://overpass-turbo.eu/s/1DIK
Thanks! That works, it doesn't have everything but there's more on there than the online NPMS public viewer.