service area

[thainamota]

Buongiorno

I am trying to use network analysis - service area - to create a polygon based on distance, for example 1000 meters.

In my case, dot = schools. So I want to see an area covered by 1000 meters.

There's one thing I can't understand... Why does it generate some weird clippings? as in the photo

Thank you so much!

Thai

serviceareapolygons‌networkanalysis footprint polygon nearest distance

[MelindaMorang · Accepted solution]

From this video, I see that your network dataset has an unknown spatial reference.  This could also be part of the problem.  You should always give your data a spatial reference.

[thainamota]

Hi Melinda,

sorry for my delay, in this period we have been work with many urban themes to the new Urban plan 

many thanks for your support...yes, 'unknown spatial reference' was the problem.

Thanks