Lidar Map

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oz_
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Lidar Map

Post by oz_ »

Hi all, new member here. I've got a little side project some of you may be interested in. I run a website which uses Open Government data from the Land Registry and I happened to notice another body, the Environment Agency, release a large new set of data, representing 17 years worth of LIDAR scans.

I downloaded some and had a go at making some maps with it and was fascinated to see all manner of lumps and bumps in the countryside, often without any ready explanation visible in Google maps. Anyway, I'm working on making this into a zoomable map of the whole country, and have been having good fun panning around it myself, spotting features and researching explanations. Some of my Googling has brought me to these forums so I thought some of you here might like to take a look at the work in progress and see what you think. It's at:

https://houseprices.io/lab/lidar/map

Coverage is patchy at the moment, which is a combination of areas I haven’t processed yet (square gaps) and areas there's no data for (jagged gaps). I'm working on filling in what I can.
I know next to nothing about archaeology, although I’m suddenly on the verge of developing an interest, so I’d be fascinated to know what any of you make of it.

Cheers, O.



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Re: Lidar Map

Post by Harry Digger »

That's brilliant Oz_; Very impressive mate ::g
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Re: Lidar Map

Post by Fusion »

Now that is a fine bit of work. Thank you for posting. I admit, it took me 25 minutes to work out where I wanted to view,(the nearby major town I was looking out for was completely absent) but after that, it was OK. I notice woodland isn't completely 'transparent' like I was expecting. Large trees, hedgerows, etc show up clearly. Useful in some ways, but not in others.

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Re: Lidar Map

Post by andya »

Clever person!! Just need labels to know where you are. I used a major road to work out where I was.

Thanks for sharing ::g
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Re: Lidar Map

Post by roamingrob »

Very good and interesting I for one would love to see this in the area I detect in
Thanks
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Re: Lidar Map

Post by fourfourtwo »

That is excellent. Thanks.

It stops about 1 mile sort of my patch but I will keep an eye on future developments

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Re: Lidar Map

Post by Redcap »

Hi and welcome to the forum. Good luck with the mapping, it's very interesting. ::g ::g ::g

Happy hunting ::g

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Re: Lidar Map

Post by ROCK HOPPER »

Just checked my local land ranger map to find my area from the massive holes left by China clay workings.

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Re: Lidar Map

Post by fingers »

Well done oz that's a great resource you are building up, I look forward to the future developments. ::g

:D

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Re: Lidar Map

Post by omegamike »

You have done a great job stitching that together but after 25 mins of searching I cannot find anywhere I recognise round my neck of the woods! but maybe when it's complete it may be a bit easier for me to navigate round the map ? ::g
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Re: Lidar Map

Post by oz_ »

Thanks for the feedback everyone, glad you like it. Yes, navigation is sorely lacking at the moment, that's definitely next on the to do list after filling in some more gaps. On the woodland issue Fusion, so far the whole map is derived from the DSM (Digital Surface Model) data, which records the first reflective surface. The other set the Agency have released, DTM (Digital Terrain Model), is where elevated features are removed. As you say both have their uses but on the whole I found the DSM images more interesting so opted to use those for starters, but no it's not much use for peering beneath the woods. Will certainly consider adding the DTM data if there's much interest.

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Re: Lidar Map

Post by fred »

Most impressive indeed! ::g
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Re: Lidar Map

Post by sengels »

Amazing data and great job. This is very useful.
Thanks for the work you put in.
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Re: Lidar Map

Post by omegamike »

omegamike wrote:You have done a great job stitching that together but after 25 mins of searching I cannot find anywhere I recognise round my neck of the woods! but maybe when it's complete it may be a bit easier for me to navigate round the map ? ::g
Found somewhere at last! :D ::g
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Re: Lidar Map

Post by dig-dog »

Thank you Oz, another useful tool in my box.
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Re: Lidar Map

Post by 1r0nMAN »

fantastic ::g was fun navigating around to find where i live / detect ect , cant wait to see the finished product ::g :D
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Re: Lidar Map

Post by Steve_T »

Thanks oz_
that has helped to verify some old maps I have been comparing and researching, this is the part that has made a lot more sense of what is there, once I found a landmark I was able to follow a main rail line and then road, then at the scale compared with Google earth was able to locate my area of interest by toggling between them.
::g

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Re: Lidar Map

Post by Fusion »

He's added more coverage. I've managed to find my father's town - with a road atlas in one hand, laptop under the other, following roads, railway lines, looking for rivers.
Lakes appear odd, I guess the infrared penetrates the water to some extent? they often appear part-black but part 'solid'. Maybe if the water is rippling or still makes the difference?

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Re: Lidar Map

Post by f8met »

That is fantastic, but as I thought it only shows about 1/5th of my permission. Just got to wait for the rest. I did notice an aircraft zig-zagging overhead a few months ago when I was detecting so hopefully it was either aerial photos or Lidar.

I have taken a couple of screen shots, I hope you don't mind to show how good it is. This is a SAM site, Civil War fort but I wanted to see what was there out of interest. I didn't realise what a feature it was.

Image

Image
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Re: Lidar Map

Post by Fusion »

Dave: how does it compare to the (2 metre resolution) on blueskymapshop?

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Re: Lidar Map

Post by barry 42 »

Excellent job ::g

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Re: Lidar Map

Post by fourfourtwo »

Rig & Furrow near my place...

Image

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Re: Lidar Map

Post by Fusion »

It's surprising how well r&f shows up, the height difference today is usually less than 60cm (2 feet), though it was more like double that when actively ploughed.

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Re: Lidar Map

Post by f8met »

Fusion wrote:Dave: how does it compare to the (2 metre resolution) on blueskymapshop?
Far better but maybe not as good if you know what I mean. I see it as another view to look at as the more different views you have the better as the different views give you more information.

This resolution shows some features not seen in the other but the bluesky seems to see through the vegetation better.
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Re: Lidar Map

Post by wesser »

Fantastic. Thanks for sharing. ::g

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Re: Lidar Map

Post by Fusion »

There's now the OS map sheet number on the bottom of the page, to help navigation.

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Re: Lidar Map

Post by hihosilver »

Very useful. Thanks. ::g
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Re: Lidar Map

Post by f8met »

Comparisons of the 3 maps, the new one and the 2 bluesky ones

Image

2m DSM

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2m DTM

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Re: Lidar Map

Post by miss a lot »

any maps for northern Ireland ????

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Re: Lidar Map

Post by Fisher1266X »

Well done Oz_ on the work so far ::g
Look forward to the progress and things to come ;)

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