TUTORIAL Race Track Builder - Inject elevation data and terrain texture

[Les Neilson]

Just back to testing after a week away... I have another question: I notice that when the response to a request is a null value, after a few cycles it repeats the request and so gets into a loop it can never get out of. I think it needs to default to the google maps value if it gets a null, what do you think?

 

[Les Neilson]

About the multiple layers, I made up a combined coverage map of England. There's data at 25cm, 50cm, 1m and 2m, and together it looks like this:

Although there are a lot of gaps, it's pretty good coverage. Much better than Scotland, anyway

 

[Les Neilson]

The URLS are:

25cm
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--6f59c1ce-cc11-43aa-b11d-e1c3ab43a192&request=GetCapabilities

50cm
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--576b6ade-d31f-470b-a044-624a3e7c77c0&request=GetCapabilities

1m
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--aace5ed3-2580-4c2e-bdd8-69b3d473d99d&request=GetCapabilities

2m
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--c67f6085-1ef9-46c8-b908-67e9143deedf&request=GetCapabilities

 

[Wurstkoffer]

Just back to testing after a week away... I have another question: I notice that when the response to a request is a null value, after a few cycles it repeats the request and so gets into a loop it can never get out of. I think it needs to default to the google maps value if it gets a null, what do you think?

It should already use Google maps values if WMS delivers a null value. Maybe there is a bug in the code. Can you send me a location where you got these null values?

 

[Les Neilson]

Okay,
lat: 56.679901317749, lng: -5.02945604536224

result was Elevation Google: 823.97973632812, Elevation WMS: -9999.0

 

[Les Neilson]

This was using URL
https://eo.jncc.gov.uk/geoserver/scotland/wms?service=wms&version=1.3.0&request=GetCapabilities

Elevation layer
scotland-lidar-1-dtm

 

[Wurstkoffer]

Can't see a problem in Config Test. With the latest additions to the code, it should send Googles elevation value to RTB.

 

[Wurstkoffer]

The URLS are:

25cm
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--6f59c1ce-cc11-43aa-b11d-e1c3ab43a192&request=GetCapabilities

50cm
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--576b6ade-d31f-470b-a044-624a3e7c77c0&request=GetCapabilities

1m
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--aace5ed3-2580-4c2e-bdd8-69b3d473d99d&request=GetCapabilities

2m
http://environment.data.gov.uk/ds/wms?SERVICE=WMS&INTERFACE=ENVIRONMENT--c67f6085-1ef9-46c8-b908-67e9143deedf&request=GetCapabilities

These layers do not provide elevation data, only RGB reliefs as images. Checked it via QGIS.

 

[Les Neilson]

You're right, there's no elevation data... The format seems to be the same as for scotland, though. It may be it's only available as a complete download, which complicates things.

 

[Les Neilson]

When you mentioned latest additions to the code before, is there a new version to download? If so, where can I find it?

Thanks!

 

[Wurstkoffer]

Yeah, you'll find them attached in the first post. But I thought you'd already adopted the changes yourself.

 

[Les Neilson]

Ah okay, I wondered if there was something new. I've already made the changes you mentioned before.

Regarding the lidar data for england, it seems like the only way to access it is by downloading directly. I can't find a wms page that has anything other than a coverage image. The other access page is separated into categories (DTM, DSM, point cloud etc), then by year of acquisition, then resolution. A pity it can't be accessed directly, but already I'm thinking that using geoserver is worth trying. I'll read up a bit when I have time and see what happens...

 

[Les Neilson]

Another weird problem: on a test project it occasionally gets itself into a loop requesting the same points and getting the same (valid) responses. As a result it stops dead. But saving, quitting and restarting gets it going again, sending out the unfilled requests from the previous session and getting good data. Good news!

I've been trying to set things up on my laptop, since I'll be away over christmas, but I'm having problems getting the google maps image to show up when I create a new project. I just get a sky blue blank screen. I can work around it (by making a duplicate with the original settings and copying the map image), but I'm not sure what I'm doing different to the setup on my desktop pc...

 

[Wurstkoffer]

Google map image should show up, if you set

$wms_orto_fetch = false;

... but i'm pretty sure you've done that, eh?

 

[Les Neilson]

Yep, first thing I checked. I copied all the files straight over without changing anything. But I'll check it again...

 

[Les Neilson]

wms_orto_save should also be false, right?

 

[Les Neilson]

I've figured out the problem. Obviously, I'd missed a step in the setup

 

[ms92ita]

Hi all,
provided that the purpose of this script is absolutely ingenious, can not find a valid AND free LIDAR / WMS service to the Le Mans circuit.
Most services are available for free in US, UK, Italy and some other countries, but not in France
Has someone tried to similar thing or implemented to local server to obtain elevation data as specular as possible?

For local server implementation, i do not have problems learning steps, fortunately I am a web developer

Thanks in advance

 

[Wurstkoffer]

So far, no one has reported on implementations via local geoserver.

I'm pretty sure that you can also find free geodata for France. A short research let me find this: https://geobretagne.fr/geonetwork/srv/eng/catalog.search#/metadata/19eaa86d-4ff6-49fc-9ef9-68c382a34dbe. So there are WMS services for France. However, I have not investigated the quality of the data available.

 

[JimL]

Thank you for this, will definitely come in handy as the norwegian government last year started laser scanning _the entire country_ at 5 dots per m2 resolution!

Screenshots of data from Rudskogen, a norwegian race track