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Posted: 10/17/2020 8:32:14 PM EDT
There are a bunch of these pavement markers on one of the back roads we travel. They are on both sides. at random intervals and point either left or right. What is their meaning?
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Posted: 10/17/2020 8:34:59 PM EDT
[#1]
It's a private road.
 Or signs telling you the road will be curving that way coming up. |
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Posted: 10/17/2020 8:35:40 PM EDT
[#2]
Quote HistoryQuoted: It's a private road. Damn, that was painful |
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Posted: 10/17/2020 8:36:44 PM EDT
[#3]
it let's you know that particular back road is exit only
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Posted: 10/17/2020 8:37:12 PM EDT
[#4]
probably markers for sat. photography of some feature or easement in that area
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Posted: 10/17/2020 8:38:03 PM EDT
[#5]
Markers for a bicycle race or marathon?
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Posted: 10/17/2020 8:38:27 PM EDT
[#6]
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Posted: 10/17/2020 8:38:44 PM EDT
[#7]
Markers for the soon to arrive UN peacekeeping force.
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Posted: 10/17/2020 8:38:54 PM EDT
[#8]
Airborne speed enforcement? Arrow in one direction to start timing, other direction to stop timing?
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Posted: 10/17/2020 8:39:06 PM EDT
[#9]
The markers are at the edges of the road and pointing toward the bar ditch in some cases.
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Posted: 10/17/2020 8:42:10 PM EDT
[#10]
I've seen them, never knew what they meant.
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Posted: 10/17/2020 8:42:16 PM EDT
[#11]
Quote HistoryQuoted: Markers for a bicycle race or marathon? |
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Posted: 10/17/2020 8:43:33 PM EDT
[#12]
Quote HistoryQuoted: Airborne speed enforcement? Arrow in one direction to start timing, other direction to stop timing? Those are normally a white stripe. |
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Posted: 10/17/2020 8:46:18 PM EDT
[#13]
They are typically ground control markers for aerial photography. Crews paint them and then obtain the GPS location of the point of the arrow. When the aerials are flown they are 2-dimensional representations of a 3-dimensional surface and are not perfect. They are "Georectified" so that the points in the photographs match the coordinates obtained using GPS so that the photograph more closely matches the surface.
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Posted: 10/17/2020 8:47:31 PM EDT
[#14]
For a serious answer, I have seen something similar here and it's always a pointer to a drainage grate on the road.
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Posted: 10/17/2020 8:55:20 PM EDT
[#15]
Quote HistoryQuoted: You're supposed to play the note on your ocarina as you drive over it. https://www.AR15.Com/media/mediaFiles/394169/CB493936-DC0C-432B-929D-293B8BB9F291_jpe-1641287.JPG  |
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Posted: 10/17/2020 8:55:48 PM EDT
[#16]
The road is in a rural part of the county and is very winding. On weekends we hear crotch rockets winding up and screaming down the road. There are quite a few bike riders (pedal powered) on the road on weekends. Lots of curves and changes in elevations.
What I'm curious about is there is a dark background that was put down, then the white chevron was applied. That would lead me to think it needs to be visible from overhead. Maybe some super secret UFO landing zone. OH!! I KNOW, ITS FOR JADE HELM!!!! |
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Posted: 10/17/2020 8:57:48 PM EDT
[#17]
Quote HistoryQuoted: They are typically ground control markers for aerial photography. Crews paint them and then obtain the GPS location of the point of the arrow. When the aerials are flown they are 2-dimensional representations of a 3-dimensional surface and are not perfect. They are "Georectified" so that the points in the photographs match the coordinates obtained using GPS so that the photograph more closely matches the surface. This. Small ones like this typically along the road with 2 foot legs are for mobile, truck mounted lidar and photogrammetry. We place larger, 4 foot leg panels for aerial, UAV or aircraft mounted lidar and photogrammetry for topographic survey of large acreage tracts of land. ETA: fresh black background for best contrast. The white shows up great in the photo, but the black gives better returns in the laser scan of lidar. |
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Posted: 10/17/2020 9:02:55 PM EDT
[#18]
Quote HistoryQuoted: They are typically ground control markers for aerial photography. Crews paint them and then obtain the GPS location of the point of the arrow. When the aerials are flown they are 2-dimensional representations of a 3-dimensional surface and are not perfect. They are "Georectified" so that the points in the photographs match the coordinates obtained using GPS so that the photograph more closely matches the surface. This actually makes sense. I was thinking there is a plan to "straighten" the road to make it more usable for increased traffic flow. |
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Posted: 10/17/2020 9:03:17 PM EDT
[#19]
I know they use white chevrons much like that to track the elevation of the road using areal photography.
photogrammetry or lidar+areal photo. The idea being the elevations of that point are known via ground survey methods, so they can be used to calibrate the elevation models. Though often times there will be a survey point at the tip of the chevron (like a mag nail, or a hub if placed in grass). Not really seeing that in the pick at the OP, but maybe they do it differently than I'm used to seeing. |
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Posted: 10/17/2020 9:04:17 PM EDT
[#20]
Quote HistoryQuoted: This. Small ones like this typically along the road with 2 foot legs are for mobile, truck mounted lidar and photogrammetry. We place larger, 4 foot leg panels for aerial, UAV or aircraft mounted lidar and photogrammetry of large acreage tracts of land. ETA: fresh black background for best contrast. The white shows up great in the photo, but the black gives better returns in the laser scan of lidar. I didn't have a tape measure with me, but I would estimate the legs of the chevron to be around 18"-24". |
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Posted: 10/17/2020 9:10:16 PM EDT
[#21]
Fema camps? Anybody?
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Posted: 10/17/2020 9:14:41 PM EDT
[#22]
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Posted: 10/17/2020 9:16:35 PM EDT
[#23]
 |
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Posted: 10/17/2020 9:16:43 PM EDT
[#24]
They are "L's" pointing to the homes of losers.
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Posted: 10/17/2020 9:18:29 PM EDT
[#25]
That part is greater than the other part.
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Posted: 10/17/2020 9:30:04 PM EDT
[#26]
Quote HistoryQuoted: The markers are at the edges of the road and pointing toward the bar ditch in some cases. Bar ditch? |
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Posted: 10/17/2020 9:35:13 PM EDT
[#27]
Quote HistoryQuoted: Markers for a bicycle race or marathon? My guess |
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Posted: 10/17/2020 9:38:19 PM EDT
[#28]
Quote HistoryQuoted: For a serious answer, I have seen something similar here and it's always a pointer to a drainage grate on the road. They do that so the plows can dig em out Probably not a thing in Texas |
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Posted: 10/17/2020 9:39:22 PM EDT
[#29]
Quote HistoryQuoted: Bar ditch? Quote HistoryQuoted: Quoted: The markers are at the edges of the road and pointing toward the bar ditch in some cases. Bar ditch? You never heard of a "BAR DITCH"? when building a road workeres would take dirt and gravel from the right of way and pile it up in the center to raise the road bed so rain would drain off. The area that the material was taken from was known as a borrow ditch. It eventually became known a a bar ditch. At least that is what we call it here in Texas. |
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Posted: 10/17/2020 9:43:08 PM EDT
[#30]
Quote HistoryQuoted: You never heard of a "BAR DITCH"? when building a road workeres would take dirt and gravel from the right of way and pile it up in the center to raise the road bed so rain would drain off. The area that the material was taken from was known as a borrow ditch. It eventually became known a a bar ditch. At least that is what we call it here in Texas. We call it a borrow here |
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Posted: 10/17/2020 9:51:21 PM EDT
[#31]
Quote HistoryQuoted: You never heard of a "BAR DITCH"? when building a road workeres would take dirt and gravel from the right of way and pile it up in the center to raise the road bed so rain would drain off. The area that the material was taken from was known as a borrow ditch. It eventually became known a a bar ditch. At least that is what we call it here in Texas. Quote HistoryQuoted: Quoted: Quoted: The markers are at the edges of the road and pointing toward the bar ditch in some cases. Bar ditch? You never heard of a "BAR DITCH"? when building a road workeres would take dirt and gravel from the right of way and pile it up in the center to raise the road bed so rain would drain off. The area that the material was taken from was known as a borrow ditch. It eventually became known a a bar ditch. At least that is what we call it here in Texas. Never heard that term until now. |
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Posted: 10/17/2020 10:16:07 PM EDT
[#32]
Quote HistoryQuoted: It's a private road 
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Posted: 10/17/2020 10:20:45 PM EDT
[#33]
Well, have you guys heard the term JEET? You know the one Jeff Foxworthy uses? How about JU? I'm sure you have heard them.
Hey, JEET? No, JU? No, ok lets' go to lunch. |
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Posted: 10/17/2020 10:26:26 PM EDT
[#34]
Chevron ahead.
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Posted: 10/17/2020 10:27:00 PM EDT
[#35]
Quote HistoryQuoted: Well, have you guys heard the term JEET? You know the one Jeff Foxworthy uses? How about JU? I'm sure you have heard them. Hey, JEET? No, JU? No, ok lets' go to lunch. You know about witchadidja huh? |
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Posted: 10/17/2020 10:28:59 PM EDT
[#36]
Quote HistoryQuoted: You know about witchadidja huh? Nope JU? |
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Posted: 10/17/2020 10:30:04 PM EDT
[#37]
Quote HistoryQuoted: probably markers for sat. photography of some feature or easement in that area Those fiduciaries are usually a plus sign. |
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Posted: 10/17/2020 10:31:13 PM EDT
[#38]
Quote HistoryQuoted: The markers are at the edges of the road and pointing toward the bar ditch in some cases. Do they precede a bend in the road to the direction they're pointed? |
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Posted: 10/17/2020 10:33:47 PM EDT
[#39]
Not sure. I will try to notice tomorrow when we head out.
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Posted: 10/17/2020 10:35:03 PM EDT
[#40]
Quoted: There are a bunch of these pavement markers on one of the back roads we travel. They are on both sides. at random intervals and point either left or right. What is their meaning? https://www.AR15.Com/media/mediaFiles/43677/Road_Markings-1641275.jpg
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Posted: 10/17/2020 10:43:31 PM EDT
[#41]
Quote HistoryQuoted: Nope JU? Mayonnaise a lot of people in this thread. |
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