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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