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A field guide to the central, creeping section of the San Andreas Fault (2006)
- pastureofplenty 2y agoI did not notice any images being incorrectly displayed upside-down when I submitted this, I apologize if some of you had trouble viewing them.
- egl2021 2y agoYou don't have anything to apologize for; you did everyone a service.
- lupusreal 2y agoSomehow, even photographs taken more than 30 years ago get flipped upsidedown when posted on the internet. Flipping images with metadata tags, which are inevitably ignored or stripped, has proven to be an extremely user hostile technical decision.
- lelandfe 2y agoImages can be rotated with metadata? Is that finally an explanation for why I’ll sometimes rotate an image on my computer, upload it, and find the uploaded copy in the original rotation?
- jefftk 2y agoFor JPEG this is the EXIF Orientation flag: https://jdhao.github.io/2019/07/31/image_rotation_exif_info/ https://jdhao.github.io/2019/07/31/image_rotation_exif_info/ It allows the camera to write almost its output without considering how you're holding the camera, and then write just three bits to indicate how it should be displayed. (It should be two bits, since the third logical bit is for mirroring, except the specific flag values they chose for the non-mirrored rotations were 0x0, 0x2, 0x5, and 0x7.)
- dunham 2y agoYeah and web browsers ignore it for compatibility with web browsers that ignored it. I believe rotation is lossy if you don't do it in metadata and the file is using subsampling. Edit: some sites will rotate the file on upload, especially for scaled, non-original versions, to avoid this issue. I've done this at work in the past.
- Mistletoe 2y agoSo frustrating to try and look at these.
- fckgw 2y agoIf you scroll down into the PDF they're also there in the correct orientation.
- ben_w 2y agoHow does law treat boundary disputes when the land itself shifts?
- culebron21 2y agoIf I understand correctly, most land lots are in local coordinate systems and use ground-based anchors as reference, not geographical coordinates (sky, GPS). When there's a slip, the only difficulty is to re-mark the zigzag. That works very well for Australia that moves northwards at 10 cm per year, IIRC.
- pfdietz 2y agoAustralia as a whole moves northward? That wouldn't alter local relationships. The concern would be when land moves on a fault and plots become distorted, like those well known pictures of roads and streams jogging sideways on the San Andreas fault.
- culebron21 2y agoI meant that if Australia had geographical coordinates in the land lots definitions, they'd have become very incorrect in a couple of decades.
- foobarian 2y agoThe point is that if our properties are defined using survey markers (like my deed, which literally spells out in English where the plot starts, how many feet this way and that) this will stand up to ground shifting. It will be the mapmakers' problem to redraw the maps though.
- lazide 2y agoIt doesn’t stand up to shifting, often, because one landmark at one corner may move relative to another. If the fault is through the middle of the property.
- culebron21 2y agoInterestingly, the concrete channel looks similar to those in Central Asia. (The latter have holes in them to let water seep into the ground.) Street view: https://maps.app.goo.gl/pvrsiYMCfeADo8NL6 https://maps.app.goo.gl/pvrsiYMCfeADo8NL6
- tetris11 2y ago(Unrelated) oh wow, ResearchGate actively begs authors to upload their full text in order to make it accessible, but prevent the public from downloading said texts unless you have a RG account?
- deleted 2y ago[deleted]
- egl2021 2y agoHas anyone visited these sites in the last few years? (The field trip was in 2006.) Has construction, road repairs, etc. obscured many of these? I know of a few roadway offsets in the immediate Bay area that have been "fixed" and are no longer visible.
- btx 2y agoOut curiosity I checked Streetview. Figure 7. Hollister 6th street 2021: https://youtu.be/RUNCEZs9nkU?t=168 https://youtu.be/RUNCEZs9nkU?t=168 2022: https://google.com/maps/@36.8506199,-121.4066009,3a,90y,250.38h,44.11t/data=!3m3!1i1!1i1!1i1 https://google.com/maps/@36.8506199,-121.4066009,3a,90y,250.... Figure 22. CA-25 2023 (patched up, drainage channel added): https://google.com/maps/@36.4065854,-120.9937028,3a,90y,216.13h,75.87t/data=!3m3!1i1!1i1!1i1 https://google.com/maps/@36.4065854,-120.9937028,3a,90y,216.... Streetview also available for 2022, 2012, 2007 that shows some cracks/offset.