#51 Global assignment of colour scales etc. to grids/images

[tanimbar]

Hello, I often spend many hours examining multiple grids (lidar derived,10+) searching for archaeological features. It's a difficult visual task usually requiring multiple changes to grid filters, changes to the standard dev. 'clip', etc.. Overall I change the grids/images each session many times. The most frustrating part of the process is individually resetting the new grids for the correct colour scale - or, for example, deciding that 10+ grids presently imaged in 'Preset - default' would be viewed more easily in 'Preset - greyscale'; this requires a separate set of selections and clicks for each grid.

Thus, would it be possible to create a global assignment of colour, etc. to all grids so that they all change together? Maybe also include global changes to stand. dev., interpolation, mode (linear, log) and so on.

I recognise that this request might come under the 'nice to have' category but it would make SAGA life a lot easier.

Thanks for considering. Regards, Tanimbar

[Volker Wichmann]

Hi Tanimbar,

there is already an option like that, maybe it is more or less what you propose:

• do the parameter settings on one "master" dataset and apply them
• then select (left-click with SHIFT or CTRL) all datasets in the "Data" tab to which the settings of the "master" should be applied
• finally do a right-click on the selection and choose "Copy settings from other layer" from the context menu popping up
• this will pop-up a dialog which allows you to select the "master" dataset

Is this what you are looking for?

[tanimbar]

Hello Volker,

Your suggestion above is almost what I propose but the problem with that option (or saving a master parameter file .sprm) is that it assigns the master grid's 'value range' to the other grids which then need resetting individually via 'histogram stretch'. I'd have to do that many, many times in a session for each grid.

Using a master .sprm file also creates problems because when loaded to other grids it applies the master grid name to the second grid - operations then get very confusing!

Regards, Tanimbar

[Volker Wichmann]

Hi,

besides the histogram stretch option this is now possible with SAGA 2.2.4, see

https://sourceforge.net/p/saga-gis/code-0/2796/

[tanimbar]

Hello Volker,
Thanks to all involved in providing these changes. After running the new functionality for a couple of hours I think it has significantly improved my productivity. Much less stressed as a result; more inclined to experiment. Splendid.

Yours in gratitude, Tanimbar.