Timeline for Does anyone know of a DBMS with global geospatial search?
Current License: CC BY-SA 3.0
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| Apr 13, 2017 at 12:33 | history | edited | CommunityBot |
replaced http://gis.stackexchange.com/ with https://gis.stackexchange.com/
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| Apr 21, 2014 at 20:30 | comment | added | tobias47n9e | I was also thinking that similar to a tangent function you always have to tell the algorithm which quadrant or in this case distance you are interested in. | |
| Apr 21, 2014 at 19:08 | comment | added | winwaed | Using only two data points, how would you define an arc longer than 180 degrees? I don't think it is possible. You always have to assume (define a priori) how the two points will be joined, and the shortest segment on a Great Circle connecting the points is the only reasonable way I can think of. | |
| Apr 21, 2014 at 15:02 | comment | added | kwknowles | That takes care of half the multiple hemisphere problem. The other half is arcs longer than 180 degrees. (postgis.net/docs/manual-1.5/ch04.html#id358554) | |
| Apr 21, 2014 at 8:10 | history | edited | tobias47n9e | CC BY-SA 3.0 |
add information about date-line
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| Apr 21, 2014 at 2:16 | comment | added | kwknowles | Last I checked, PostGIS doesn't support polar search, nor crossing the IDL. It makes the ubiquitous mistake of all GIS that latitude/longitude is a Cartesian coordinate system. The answer isn't as easy as that. | |
| Apr 20, 2014 at 21:56 | comment | added | winwaed | +1 for Postgres/PostGIS - this is the first question that is relevant to my day job :-) | |
| Apr 20, 2014 at 16:02 | history | answered | tobias47n9e | CC BY-SA 3.0 |