Open qissue-bot opened 5 years ago
Original Redmine Comment Author Name: Marco Hugentobler (Marco Hugentobler) Original Date: 2010-05-19T00:22:34.000Z
Added improved version of the patch. The transform parameters are now shown in the status bar, fixed update of georef transformation when enabling/disabling gcps in the table, fixed pdf report layout
Original Redmine Comment Author Name: mmassing - (mmassing -) Original Date: 2010-05-23T03:52:09.000Z
Applied in commit:4d46f190 (SVN r13553) - thanks, Marco.
I'll leave the ticket open for now, because I'd eventually like to add this functionality for the higher order transform types (linearization via jacobi matrix or numerical approximation of the derivatives), and also a config option to choose the desired units.
I think the latter is useful because reporting residuals in pixel units shows if residuals are in the ballpark of input discretization, whereas map units are useful to better get an estimate of absolute error.
Author Name: Marco Hugentobler (Marco Hugentobler) Original Redmine Issue: 2731, https://issues.qgis.org/issues/2731
Original Assignee: mmassing -
The following patch shows the residuals in the gcp table in map units where possible and in pixels else. Because interpretation about the gcp errors is easier with map units, so the patch converts pixels->map units for linear transformation and helmert. For the other transformations, conversion to map units is not so straightforward, therefore they are kept in pixels.