[josm-dev] Draft patch for PicLayer

[MP]

 On Tue, 16 Nov 2010 20:09:07 +0100, Olivier Croquette 
 <ml at ocroquette.de> wrote:
> Hi,
>
> as already discussed, I have been working on PicLayer recently. You
> will find attached a patch which adds the following features and
> corrections :
>
> Misc:
> - allow to auto-zoom on PicLayers (e.g. support of the bounding box 
> visitor)
> - added possibility to rename the Piclayers
>
> Precision :
> - high precision scaling and rotating using the SHIFT key
> - low/high precision configurable using prefs
>
> Loading :
> - "load picture" dialog now remembers and restores the dir previously
> used (I was going crazy without this feature)
> - multiple selection of files to load (before it was file by file 
> only)
> - automatic zooming on newly loaded picture (can be disabled by
> setting piclayer.zoom-on-load=0)
> - automatic loading of cal files when they are available (can be
> controlled with piclayer.autoloadcal=yes/no/ask
> - the name of the layer is now the name of the loaded file by default
>
> Comments are more than welcome.

 There is still one quite important feature missing - calibration given 
 geographic coordinates. Sometimes you have image where you know 
 coordinates (lat+lon) either of image corners, or sides (like image 
 going from 14.5 to 14.6 east and 52.5 to 52.6 north - which is case of 
 many images which I create by analyzing OSM data from dumps and somehow 
 putting the results in image)

 Unfortunately, the calibration offers only moving and scaling the image 
 in JOSM (which makes it vary hard or almost impossible to position 
 accurately), editing the calibration file gives only some scale + 
 translation numbers, which seems to be in some internal units and ther 
 is no easy way to calculate them from geographic coordinates.

 I think there could be some dialog to enter the coordinates from which 
 the image would be calibrated ...

 Martin