[Talk-GB] Environment Agency LIDAR datasets OGL licensed now available

[Chris Hill]

Hi Tony,
As OS OpenMap is vector data, finding the height for any building 
outline would be similar to using OSM building outlines. Using the DTM 
data would also give the base height AMSL of the building.

I have used DEM data in Blender (https://www.blender.org/) to create a 
landscape to match a real place. Creating realistic building shapes 
would be great, having building height is a useful part of that.

-- 
Cheers, Chris
user: chillly



On 26/09/15 10:05, tony wroblewski wrote:
> Hi Chris
>
> Would it be possible to somehow use this data with the building
> outlines from OS OpenMap?. I know that data is somewhat
> simplified/generalised, but maybe combined together we could get an
> idea of how the simplified shapes from OS OpenData are terraced and
> even get their heights. I'm not talking about an import, but an
> imagery layer with both combined somehow.
>
> I've used OS and OSM data combined to produce free scenery for flight
> simulators http://world2xplane.com/2015/03/30/gb-pro-scenery/. (I've
> used OpenStreetMap for other countries for great effect, but the UK
> data lacks detail). Despite the simplified data, I've used various
> simple algorithms and rules to try and terrace the buildings
> automatically (It doesn't need to be 100% accurate for the
> flight-sim), and the results have given realistic looking UK towns and
> cities. For my next version of the scenery, I'm going to use this data
> to also get the correct building heights (my subtracting the height
> from the land mesh underneath). Perhaps this effort could be useful
> for OSM in some way.
>
> Regards
>
> Tony
>
>
> On 25 September 2015 at 23:03, Chris Hill <osm at raggedred.net> wrote:
>> I've had a go at extracting the height of buildings from the Environment
>> Agency LIDAR, and it seems possible.
>>
>> I loaded the EA data into a database and found all the height points within
>> the polygon of an existing building outline. The highest value is the height
>> of the building. From that I could (haven't yet) create a file of changes to
>> add the height to each building. One thing that causes a problem is a tree
>> near a house as it can create a higher point than the house.
>>
>> Using this would be an import and would need to go through the import
>> declaration process IMO. I have also thought about creating an editor
>> overlay to show the heights so they can be added manually. It's more work
>> and I think it's still really an import, but checking each height as it gets
>> added should spot anomalies.
>>
>> I'm going to tidy up the process and write it up in detail as a blog post
>> over the next few days so anyone else can try it out too.
>>
>> --
>> Cheers, Chris
>> user: chillly
>>
>>
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