Original: GRASS 7.1.svn (brasil):~ > v.info map=tc10 +----------------------------------------------------------------------------+ | Name: tc10 | | Mapset: terraclass | | Location: brasil | | Database: /home/externo/fabioasd/grass | | Title: | | Map scale: 1:1 | | Name of creator: fabioasd | | Organization: | | Source date: Sat Jan 3 23:38:40 2015 | | Timestamp (first layer): none | |----------------------------------------------------------------------------| | Map format: native | |----------------------------------------------------------------------------| | Type of map: vector (level: 2) | | | | Number of points: 0 Number of centroids: 5323741 | | Number of lines: 0 Number of boundaries: 12889264 | | Number of areas: 5573197 Number of islands: 1332382 | | | | Map is 3D: No | | Number of dblinks: 1 | | | | Projection: Latitude-Longitude | | | | N: 5:16:18.443667N S: 18:02:29.687783S | | E: 43:59:58.760386W W: 73:59:29.009623W | | | | Digitization threshold: 0 | | Comment: | | | +----------------------------------------------------------------------------+
After dissolve: +----------------------------------------------------------------------------+ | Name: tc10d | | Mapset: terraclass | | Location: brasil | | Database: /home/externo/fabioasd/grass | | Title: | | Map scale: 1:1 | | Name of creator: fabioasd | | Organization: | | Source date: Sat Jan 3 23:38:40 2015 | | Timestamp (first layer): none | |----------------------------------------------------------------------------| | Map format: native | |----------------------------------------------------------------------------| | Type of map: vector (level: 2) | | | | Number of points: 0 Number of centroids: 5120039 | | Number of lines: 0 Number of boundaries: 12641473 | | Number of areas: 5369494 Number of islands: 1366321 | | | | Map is 3D: No | | Number of dblinks: 1 | | | | Projection: Latitude-Longitude | | | | N: 5:16:18.443667N S: 18:02:29.687783S | | E: 43:59:58.760386W W: 73:59:29.009623W | | | | Digitization threshold: 0 | | Comment: | | | +----------------------------------------------------------------------------+ -=--=-=- Fábio Augusto Salve Dias http://sites.google.com/site/fabiodias/ On Mon, Jan 5, 2015 at 5:49 PM, Fábio Dias <[email protected]> wrote: > Just for further reference, the v.dissolve takes around 24h in this > dataset. I'll post the v.info of both as soon as it is finished. > > Any other ideas? I have a fairly powerful server at my disposal, but > I'm out of ideas... > -=--=-=- > Fábio Augusto Salve Dias > http://sites.google.com/site/fabiodias/ > > > On Sun, Jan 4, 2015 at 7:45 PM, Fábio Dias <[email protected]> wrote: >> As promised, profile of v.generalize, as of r63952. >> (The data might not be exactly the same, I might have run v.clean somewhere). >> >> I still have the raw profiles, if anyone wants them. >> >> F >> -=--=-=- >> Fábio Augusto Salve Dias >> http://sites.google.com/site/fabiodias/ >> >> >> On Sun, Jan 4, 2015 at 6:01 PM, Fábio Dias <[email protected]> wrote: >>> Attached is pdf generated with google-perf of v.generalize, using >>> g7b4. I'm running it again for trunk. >>> -=--=-=- >>> Fábio Augusto Salve Dias >>> http://sites.google.com/site/fabiodias/ >>> >>> >>> On Sun, Jan 4, 2015 at 5:54 PM, Markus Metz >>> <[email protected]> wrote: >>>> On Wed, Dec 31, 2014 at 5:20 PM, Fábio Dias <[email protected]> wrote: >>>>> >>>>> I fussed about the v.generalize code, thinking about pthread >>>>> parallelization. The geometry part of the code is *really* fast and >>>>> can be easily parallelized so it can run even faster. But, according >>>>> to the profile google-perf gave me, the real bottleneck is inside the >>>>> check_topo function (which uses static vars and inserts a new line >>>>> into the vector, not only checks if it breaks topo - got stuck a while >>>>> in there due to the misnomer). More specifically in the Rtree function >>>>> used to check if one line intersects other lines. >>>>> >>>> >>>> The function used in check_topo is Vect_line_intersection() which does >>>> much more than just testing for intersections. The process could be >>>> made much faster if Vect_line_check_intersection() would be modified >>>> such that connections by end points are ignored. But I don't know if >>>> this would break other modules or other functionality. >>>> >>>> Markus M _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
