Re: [postgis-users] Check and validate directionality of road lines

2023-04-26 Thread Gary Turner
On your right! ;) If what you mentioned below is what you actually wanted,  for something general you would have to factor in which jurisdiction you are in as to which side you drive. On 26/04/2023 10:18 pm, Shaozhong SHI wrote: On Tue, 25 Apr 2023 at 21:18, Richard Greenwood wrote:

Re: [postgis-users] Check and validate directionality of road lines

2023-04-26 Thread Shaozhong SHI
On Tue, 25 Apr 2023 at 21:18, Richard Greenwood wrote: > First you would have to define what valid directionality is. > > In some cases valid directionality might be that all roads project outward > in a cardinal direction from an origin. For example, city blocks running > north-south or east-wes

Re: [postgis-users] Check and validate directionality of road lines

2023-04-25 Thread Richard Greenwood
First you would have to define what valid directionality is. In some cases valid directionality might be that all roads project outward in a cardinal direction from an origin. For example, city blocks running north-south or east-west. In that case you could compare the X or Y coordinates of the st

[postgis-users] Check and validate directionality of road lines

2023-04-25 Thread Shaozhong SHI
How best to check and validate directionality of road lines? Regards, David ___ postgis-users mailing list postgis-users@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/postgis-users