[Talk-GB] Proposal to do some mapping in North Lancashire

[Roger James]

Hi Chris, Philip

I take your point about the buildings polygons being very low quality. 
The merging is not too bad in rural areas like these where the building 
density is low, but a lot of detail is missing. My plan was just to use 
the OS stuff as a starting point, then modify the polygon using a 
combination of EA Lidar data and Bing Imagery. Taking into account your 
suggestions. I think I will modify my workflow to do what  I can to 
improve the quality of the footprints in QGIS before putting the data in 
OSM.

I have copied this post to talk-gb and will move over there.

BTW you can see some of my post processed lidar imagery at 
https://www.facebook.com/media/set/?set=a.10153566350398437.1073741827.629788436&type=1&l=3ae0282808 


I am making some further progress on the lidar data using QGIS and BREC.

Roger

On 13/05/16 11:11, Chris Hill wrote:
> It's great that you want to add to the map data. Please do not add the 
> OS OpenMap Local building outlines. They are heavily simplified and as 
> such, poor quality. You can't distinguish how many residences there 
> are in a building outline, so is it detached, semi-detached or a 
> terrace? Adding buildings is valuable, but I believe in quality not 
> quantity, so I would trace building outlines from aerial images and 
> not import the 'dumbed-down' OS Open data. Let's make the best map we 
> can, not just import OS's deliberately reduced quality stuff.
>
> Cheers,
> Chris (chillly)
>
> BTW, this list list is almost dead. If you really want to reach people 
> I would use talk-gb.
>
>
> On 13/05/16 10:50, Roger James wrote:
>> Hi,
>>
>> I am proposing to do some mapping in a couple of parishes in North 
>> Lancashire. These are "Slyne-with-Hest" and "Nether Kellet". I plan 
>> to use the latest OS OpenMap Local dataset to provide basic building 
>> boundaries where none previously exist. I will be using OSTN02 data 
>> to do the transforms.
>>
>> Any comments or suggestions gratefully accepted.
>>
>> Roger
>>
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