That's odd. I redid the entire thing just now (restarted QGIS, made scratch point layer, created a 100m buffer) and the values I get are now correct. Even the area computations were off in the first one but after redoing the process, everything looks good.
point-buffer2.png <https://drive.google.com/file/d/1EmWTh3mgyOAvNRUzxMQgxVmMJZqg_-pg/view?usp=drive_web> Weird. Maybe I missed something during the first one. Hahaha. Anyway, sorry for bothering you all. Cheers! On Thu, Sep 27, 2018 at 11:07 PM DelazJ <[email protected]> wrote: > Hi, > There might be more information in the *Info* drop-down menu. Expand it, > please. > > Harrissou > > Le jeu. 27 sept. 2018 à 16:55, Ben Hur Pintor <[email protected]> a > écrit : > >> Hi everyone. >> >> I apologize if this has been asked before but I would just like to >> clarify if this is how the buffer algorithm in QGIS should function. >> >> *Issue:* The actual distance from the input layer to the buffer polygon >> created by the Buffer processing tool (and v.buffer) is not equal (only >> around 80%) to the Distance parameter provided in the said tool. >> >> *Example:* My coordinate reference system is WGS84/UTM Zone 51N (EPSG: >> 32651). I create a 100m buffer around a point but when I measure the >> resulting circle, its edge is only ~80m from the point (see buffer-point >> and buffer-point-distance below). >> >> buffer-point.png >> <https://drive.google.com/file/d/1SAptLcRKnGVc8zyESkl-sJZ23a5OWEsy/view?usp=drive_web> >> >> buffer-point-distance.png >> <https://drive.google.com/file/d/1aQ0mfadGnEzISkPnu-GGX9SUu1GXhGMs/view?usp=drive_web> >> >> I create a 50m buffer around a line but when I measure the resulting >> buffer, its edge is only ~40m from the line (see line-buffer and >> line-buffer-distance below). >> >> line-buffer.png >> <https://drive.google.com/file/d/11cNTRNbHxB3cFCaZEhXDWqKYEdWJX31K/view?usp=drive_web> >> >> line-buffer-distance.png >> <https://drive.google.com/file/d/1PGRabSqF-zrOCpAboncQ_yQxx_0ulByN/view?usp=drive_web> >> >> >> Clarifications will be much appreciated. Maybe I just missed some part of >> the documentation. >> >> Thank you. >> >> Sincerely, >> Ben Hur >> >> -- >> --- >> >> *Ben Hur S. Pintor* >> bnhr.xyz >> >> >> Consultancy · Training & Support · Development & Innovation >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > -- --- *Ben Hur S. Pintor* bnhr.xyz Consultancy · Training & Support · Development & Innovation
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