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Discussion: Problem With the USA National Map Viewer?

in: Orienteering; General

Apr 20, 2019 10:47 AM # 
My 'go to' source for LiDAR files in the USA has recently been the National Map Viewer, that is since USGS took LiDAR off their Earth Explorer site.
Yesterday and today I have tried to download .laz files that the NMV says are available but I get this message:" didn’t send any data"
That is strange. Has anyone else found that problem? Does anyone know if they are closed for service issues? Have they had a budget cut? Are they no longer sending to non-USA IP addresses?
I tried two different locations in two different states and got the same error message back.
Apr 20, 2019 11:32 AM # 
rockyftp doesn't seem to be working at the moment. Hopefully just service issues, I have noticed outages in the past. (AP gets data from there for GPS elevation correction)
Apr 22, 2019 9:54 PM # 
Looks like it's back.
Apr 23, 2019 9:18 AM # 
I haven't been able to access Gmail since my laptop got fixed a fortnight ago.

Corrupted Content Error

The site at has experienced a network protocol violation that cannot be repaired.

The page you are trying to view cannot be shown because an error in the data transmission was detected.

Please contact the website owners to inform them of this problem.
Apr 23, 2019 1:50 PM # 
Not that it's relevant to National Map Viewer but have you googled that error message?
Apr 23, 2019 2:54 PM # 
I figured the national map viewer problem was solved so I move onto another issue :-)

Also yes I've looked it up. Apparently I may have an out-of-date Firefox but problem is I have the latest version. Works on any other browser.
Apr 23, 2019 4:44 PM # 
So you can access Gmail then, just not with your preferred browser.

Did you try any of the suggested solutions? Clearing browser cache, cookies, using the shorter url without the "mail/u/0/" on the end? I see people reporting success from these. ymmv of course.
Apr 23, 2019 5:31 PM # 
Do you people really say "fortnight" instead of "acuppla weeks"?
Apr 23, 2019 5:34 PM # 
Kids say fortnite all the time.
Apr 23, 2019 8:31 PM # 
Y'all in the US are so lucky :P you can make so many maps like this so fast with all your free lidar.... just need to check land permissions....

Apr 23, 2019 10:26 PM # 
Land permissions, a minor detail...
Apr 23, 2019 11:03 PM # 
Lidar isn't free in Canada?
Apr 23, 2019 11:45 PM # 
In some places it is like around Ottawa. In Alberta there's like none. You need to pay private companies to get it flown.

I think that if you make sure your maps are in provincial parks then its okay to train on them. If you want to hold an event on it you'd have to ask parks. That's how we have it here.

The above map is in Glacier National Park in Montana, which is the closest Lidar in the US to Calgary. (4 hours away by car). I just need to figure out how to batch process it and I will probably go down there to train sometime over the summer. Im really interested to see how accurate the cliffs are, and if there are really tiny cliffs of that's just noise.
Apr 23, 2019 11:45 PM # 
So you can access Gmail then, just not with your preferred browser.

As much as it pains me to admit it, I only just tried a different browser last night after not being able to access it for a cuppla weeks. Silly me!

Clearing the browser cache allows me to attempt to login but once I've done that, it reverts to the error screen. The mail/u/0/ suffix magically reappears even if I try deleting it.
Apr 24, 2019 2:16 AM # 
Tried another suggested workaround and it seems to have fixed the problem for now although it also says this may be a temporary fix. Will see how it holds up.
Apr 24, 2019 2:32 AM # 
Lidar isn't free everywhere in the USA, either. MN-WI side by side, one free, one not.
Apr 24, 2019 2:36 AM # 
@Runner99 some of the c2 might be earth banks, not cliffs, though still accurate in their location. Same as the knolls that might end up being boulders, or root stocks...
Apr 24, 2019 2:46 AM # 
Many U.S. National Parks are generally off limits to organized orienteering. Not always, but generally it's very hard to get permissions there.
Apr 24, 2019 3:21 AM # 
Just run a disorganised orienteering event and you'll be fine.
Apr 24, 2019 10:36 AM # 
We actually have gotten around permission problems at least once by holding a disorganized event.
Apr 24, 2019 6:57 PM # 

Good place for training imo, City of Rocks.... Im pretty sure these cliffs are fairly accurate from looking at the satellite...
Apr 24, 2019 7:38 PM # 
Good for you finding that LiDAR for Montana.
We were looking for some near Bozeman and struck out.
What is your source?
Apr 24, 2019 7:53 PM # 
The link at the stop of the thread. Lol

Elevation Source Data (3DEP) - Lidar, IfSAR -> Lidar Point Cloud (LPC) -> show availability -> (then zoom in on the area and click on) find products

I'll look around Bozeman for lidar....
Apr 24, 2019 8:04 PM # 
Montana is not the best state with lidar, but you still have alot of options it you kartapullin all this lidar you'll have maps for the rest of ur life:

Red is the closest batch to Bozeman. I'm thinking of doing stuff in Helena, lots of lidar there. Orange are medium close to you. And Blue is the area that I posted which I will be working on.

I think I have alot of noise like thick bushes are being read as cliffs, and thus the above map is not perfect, BUT the vegitation is basically perfect and the contours are, the cliffs are iffy.

Check land ownership too for those areas, let me know if you make any maps there!

Also I would make an orienteering club in Helena. Super easy to make maps are there is lidar all around it. Just need permissions...
Apr 24, 2019 8:28 PM # 
Well, and interested people...
Apr 24, 2019 8:54 PM # 
Runner99. I am nowhere near Montana but last year I heard that there was a US Junior National team member moving to Bozeman and I thought I could be helpful helping her with the start of orienteering maps in the area. It turns out my help apparently wasn't useful but I did get to practice making some maps, one of Montana State University and one of a XC ski area in Bridger Canyon east of Bozeman.
The ski area looks very nice from all on-line indications but the best contour information I could find was old USGS topo sheets with 40 foot contour intervals. I traced them on to the map and there it sits. Perhaps the locals have found something better.
I looked at that area southeast of Bozeman. Funny that they have LiDAR for there. It is pretty isolated and very steep.
Apr 24, 2019 9:11 PM # 
Let me know if that Junior is out there and wants maps, I can quickly grind out some png's of that area trying to pick out the flatter parts. That way they have something to run on...
Apr 24, 2019 10:14 PM # 
Runner99, Did you know that when you were about three years old there was an orienteering race at Lone Pine State Park near Kalispell MT.
It seems most of the participants were from Calgary including Mark Astridge and Bill Jarvis. Those guys probably keep their maps from old competitions. Doesn't everybody?
Apr 25, 2019 2:30 AM # 
I think you're looking for the winner of the JWOC trials races

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