Timeline for Why accurate area of all countries cannot be obtained using a single EPSG code, even if it corresponds to an equal-area projection?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Sep 29, 2021 at 6:52 | comment | added | Babel | Apart from what @radouxju sayed about the way QGIS connects the vertices, also consider that every reprojection (transformation) is a potential source for (rounding and other) errors - so the accuracy of the transformation is indicated in the transformation dialog, see: i.sstatic.net/QKQeV.png - the larger the area, the smaller the influence of this. | |
| Sep 28, 2021 at 11:21 | comment | added | radouxju | in theory yes, but you could have very minor differences in practice. | |
| Sep 28, 2021 at 11:01 | comment | added | zabop | Thank you for your answer. If I densify the polygons sufficiently, and then use two equal area projections, the areas calculated will be exactly the same, is this correct? | |
| Sep 28, 2021 at 10:33 | comment | added | Babel | Indeed - good point: see here for such a case: gis.stackexchange.com/a/392248/88814 | |
| Sep 28, 2021 at 10:27 | history | answered | radouxju | CC BY-SA 4.0 |
