#266 closed enhancement (fixed)
ST_Length for geography
| Reported by: | robe | Owned by: | pramsey |
|---|---|---|---|
| Priority: | medium | Milestone: | PostGIS 1.5.0 |
| Component: | postgis | Version: | master |
| Keywords: | Cc: |
Description
Paul, Just in case its not in your todo and if its not too much trouble. I think an ST_Length would round off the measurement offerings for geography and imagine it should be easier than the ST_Distance and ST_Area you have already implemented.
I imagine calculating lengths of streets and roads is a common practice.
Change History (2)
comment:1 by , 15 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
comment:2 by , 15 years ago
Hmm -- Paul I see you managed to sneak in the behavior of Perimeter in the ST_Length function for geography. I must flag this as being inconsistent with geometry ST_Length which returns 0 for areals.
I'm not so bothered about this inconsistency (since I consider returning 0 for length of an areal kind of silly, but as much as I hate alias's and unnecessary function bloat, I think it might be prudent to introduce one for ST_Perimeter. The reason being -- my old-fashioned self-speaking:
When I think of length -- I think Line (not polygon) When I think areal -- I don't think length, I think perimeter.
I can only imagine old-fashioned thinkers like me will think the same, and that there are a large number of said people in our community.
I'm going to leave this closed and you can reopen or change unless you think I am being unnecessarily petty.
Committed at r4662