[Talk-us] Microsoft Building Import for Greenville, SC

Mike N niceman at att.net
Sun Mar 25 19:47:40 UTC 2018


There is some question about the overall accuracy of the height data in 
this import, but I think the units are correct in meters.  For example, 
the Landmark Building [1] is a known height of 305 feet / 92 meters. [2] 
Mapillary view (from a distance) [3] .

    Microsoft measured it at 101 meters / 331 feet; an error of 26 feet. 
  Since the building is on a slope, it's not known what reference was 
used as the base in the Microsoft height measurement.   A measure of 101 
feet would be 1/3 of the actual height and not what I would expect.

   Hopefully the units weren't mixed by using different units for 
different buildings.  I couldn't see any indication of this in the 
original shape file.

[1] https://www.openstreetmap.org/way/41979319#map=19/34.85453/-82.39767
[2] 
https://www.emporis.com/buildings/127342/landmark-building-greenville-sc-usa
[3] 
https://www.mapillary.com/app/?lat=34.85566666666667&lng=-82.3993888888889&z=17&focus=photo&pKey=lPCYDmX9ZV5E8JMd6xG3Kw

On 3/25/2018 2:54 PM, Leon Karcher wrote:
> Hello Mike,
> 
> I think that you have made the same mistake as they made with the 
> Tampa/Clearwater, FL Microsoft building data import: The height is given 
> in feet and inches, but you used metre scheme (x.y) instead of x'y". An 
> example:
> 
> This commercial building 
> <https://www.openstreetmap.org/way/343235673> is never 16 meters tall as 
> said in its height tag. (View on Mapillary 
> <https://www.mapillary.com/app/?lat=34.829709115470564&lng=-82.40749038763568&z=14.30535083537551&focus=photo&pKey=ozDDkY97ETw_S7WwI9xZqQ>) 
> If you compare further buildings, you will see that this is applicable 
> for all others.
> 
> I hope you still can fix it, because the managers of the Florida import 
> didn't.
> 
> Thanks,
> Leon
> 
> 2018-03-25 20:36 GMT+02:00 Mike N <niceman at att.net 
> <mailto:niceman at att.net>>:
> 
>     In accordance with Step 6 / item 4 of the imports checklist, the
>     import and QA is now completed.
> 
>     Thanks to Microsoft for making building and height data available
>     and multiplying the efforts of a few local mappers!
> 
> 
>     On 3/14/2018 10:21 PM, Mike N wrote:
> 
> 
>         FYI, this is proceeding with 2 people, on dedicated accounts
>         Greenville_SC_City_MSImport_1 and Greenville_SC_City_MSImport_2
> 
>         On 1/24/2018 8:28 PM, Mike N wrote:
> 
> 
>             The OSM Upstate SC group is planning an import of Microsoft
>             building shapes for the city of Greenville, SC.   The
>             candidate wiki page is at
> 
>             https://wiki.openstreetmap.org/wiki/Greenville_SC_Building_Import
>             <https://wiki.openstreetmap.org/wiki/Greenville_SC_Building_Import>
> 
>                 The actual import won't take place for 1-2 months yet to
>             allow time to review the plans.
> 
>                 Mike
> 
> 
> 
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