Re: [GRASS-user] create a common colour scale
Hello Hamish, thank you for the response and the hints. They are very useful as i cannot get GRASS7 to work. Best wishes, Raphael. On 29 Jul 2014, at 2:52 pm, Hamish hamish.webm...@gmail.com wrote: Raphael wrote: I wonder if anyone knows how to create a common colour scale for different raster maps? I want to display all six maps on the same page with the single colour scale but I cannot find how to do this in GRASS. More specifically, I have six raster maps of rainfall for different time periods (each has a different range of values) and I would like to display them all with the same colour scale. The colour scale needs to be constructed using the min and max values of the set of six maps (and not just individual maps. For only 6 maps I wouldn't bother with scripting a mix,max variable, just run r.info in a loop and copy out the min,max by hand. for MAP in `g.mlist rast pattern=rain*` ; do r.info -r $MAP done then make a dummy map with r.mapcalc with overall min and max range. min=1.2345 max=9.8765 r.mapcalc color_map = if(row 10, $min, $max) and then apply it with: for MAP in `g.mlist rast pattern=rain*` ; do r.colors $MAP rast=color_map done Or run r.colors with the rules= option to set up some color rules by hand, then apply to all in a loop. But what I usually do these days in GRASS 6 is to use the r.stack addon module to temporarily consider all the maps together, which allows for the nice 'r.colors -e' equalized histogram color scaling. You can copy the color map to a small dummy raster with the r.colors rast= option then delete the stacked raster map if you want to save space, then apply it to all maps as in the Bourne shell loop above. regards, Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] create a common colour scale
Raphael wrote: I wonder if anyone knows how to create a common colour scale for different raster maps? I want to display all six maps on the same page with the single colour scale but I cannot find how to do this in GRASS. More specifically, I have six raster maps of rainfall for different time periods (each has a different range of values) and I would like to display them all with the same colour scale. The colour scale needs to be constructed using the min and max values of the set of six maps (and not just individual maps. For only 6 maps I wouldn't bother with scripting a mix,max variable, just run r.info in a loop and copy out the min,max by hand. for MAP in `g.mlist rast pattern=rain*` ; do r.info -r $MAP done then make a dummy map with r.mapcalc with overall min and max range. min=1.2345 max=9.8765 r.mapcalc color_map = if(row 10, $min, $max) and then apply it with: for MAP in `g.mlist rast pattern=rain*` ; do r.colors $MAP rast=color_map done Or run r.colors with the rules= option to set up some color rules by hand, then apply to all in a loop. But what I usually do these days in GRASS 6 is to use the r.stack addon module to temporarily consider all the maps together, which allows for the nice 'r.colors -e' equalized histogram color scaling. You can copy the color map to a small dummy raster with the r.colors rast= option then delete the stacked raster map if you want to save space, then apply it to all maps as in the Bourne shell loop above. regards, Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] create a common colour scale
Hi Raphael, I do recommend upgrading and going the way Anna mentioned, especially if you are dealing with a large number of maps. But if that is not an option here are the steps I'd take: 1) run r.info -r on each map to get the min/max range 2) user r.colors with one of the maps and the rule option to set you color table to that map. Your rules might look something like this min_value red (max - min)/2 yellow max_value blue end -- by substituting the min / max in the above you get a colortable going from red to blue with yellow in the middle 3) copy the color table you just set to the other maps using r.color rast option. Take a look at r.color man page for more info http://grass.osgeo.org/grass64/manuals/r.colors.html Daniel On Tue, Jul 22, 2014 at 11:46 PM, raphael.viscarra-ros...@csiro.au wrote: Thank you Daniel and Anna for the suggestions. Daniel, I wonder how I might display the ‘common’ colour legend when visualising the maps? When the maps are visualised, the colour legend changes to the min max of the current map displayed. Anna, I use GRASS 6.4.2 – so I guess I should upgrade… Thank you again. Raphael. __ Raphael *VISCARRA ROSSEL* | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945 | m. +61 467 769 364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJ From: Anna Petrášová kratocha...@gmail.com Date: Wednesday, 23 July 2014 12:15 pm To: Daniel Victoria daniel.victo...@gmail.com Cc: Viscarra Rossel, Raphael (LW, Black Mountain) raphael.viscarra-ros...@csiro.au, grass grass-user@lists.osgeo.org Subject: Re: [GRASS-user] create a common colour scale Hi, in case you use GRASS 7, r.colors accepts multiple maps or a file with the map names. So this should do it: r.colors map=precip1,precip2,precip3 color=precipitation Also, have a look at temporal modules (GRASS 7 only). You can register the series of maps as a dataset (t.create, t.register) and then you can easily get the min, max values for the entire series and there is also t.rast.colors. Anna On Tue, Jul 22, 2014 at 9:41 PM, Daniel Victoria daniel.victo...@gmail.com wrote: Hi Raphael, This is what I did some time ago when I had the same problem 1) Find out the overall minimun and maximum precipitation over all maps. 2) Use r.colors with the rules option to compose a colortable that cover my entire precip range. 3) Apply the same colortable to all maps 4) plot and be happy Hope it helps Daniel On Tue, Jul 22, 2014 at 10:01 PM, raphael.viscarra-ros...@csiro.au wrote: Hello I wonder if anyone knows how to create a common colour scale for different raster maps? I want to display all six maps on the same page with the single colour scale but I cannot find how to do this in GRASS. More specifically, I have six raster maps of rainfall for different time periods (each has a different range of values) and I would like to display them all with the same colour scale. The colour scale needs to be constructed using the min and max values of the set of six maps (and not just individual maps. Will appreciate any input please. Thank you, Raphael. __ Raphael *VISCARRA ROSSEL* | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945 | m. +61 467 769 364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] create a common colour scale
Thank you Daniel. I installed grass 7 but my rasters will not display. Strange. Will wait to see if others with macs have encountered this problem. Until then your solution sounds good and will give it a gob tomorrow. Best wishes, Raphael. Sent from my mobile device On 23 Jul 2014, at 10:04 pm, Daniel Victoria daniel.victo...@gmail.commailto:daniel.victo...@gmail.com wrote: Hi Raphael, I do recommend upgrading and going the way Anna mentioned, especially if you are dealing with a large number of maps. But if that is not an option here are the steps I'd take: 1) run r.infohttp://r.info -r on each map to get the min/max range 2) user r.colors with one of the maps and the rule option to set you color table to that map. Your rules might look something like this min_value red (max - min)/2 yellow max_value blue end -- by substituting the min / max in the above you get a colortable going from red to blue with yellow in the middle 3) copy the color table you just set to the other maps using r.color rast option. Take a look at r.color man page for more info http://grass.osgeo.org/grass64/manuals/r.colors.html Daniel On Tue, Jul 22, 2014 at 11:46 PM, raphael.viscarra-ros...@csiro.aumailto:raphael.viscarra-ros...@csiro.au wrote: Thank you Daniel and Anna for the suggestions. Daniel, I wonder how I might display the ‘common’ colour legend when visualising the maps? When the maps are visualised, the colour legend changes to the min max of the current map displayed. Anna, I use GRASS 6.4.2 – so I guess I should upgrade… Thank you again. Raphael. __ Raphael VISCARRA ROSSEL | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945tel:%2B61%202%206246%205945 | m. +61 467 769 364tel:%2B61%20467%20769%20364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011http://www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJhttp://scholar.google.com.au/citations?hl=enuser=KpJdvKEJ From: Anna Petrášová kratocha...@gmail.commailto:kratocha...@gmail.com Date: Wednesday, 23 July 2014 12:15 pm To: Daniel Victoria daniel.victo...@gmail.commailto:daniel.victo...@gmail.com Cc: Viscarra Rossel, Raphael (LW, Black Mountain) raphael.viscarra-ros...@csiro.aumailto:raphael.viscarra-ros...@csiro.au, grass grass-user@lists.osgeo.orgmailto:grass-user@lists.osgeo.org Subject: Re: [GRASS-user] create a common colour scale Hi, in case you use GRASS 7, r.colors accepts multiple maps or a file with the map names. So this should do it: r.colors map=precip1,precip2,precip3 color=precipitation Also, have a look at temporal modules (GRASS 7 only). You can register the series of maps as a dataset (t.create, t.register) and then you can easily get the min, max values for the entire series and there is also t.rast.colors. Anna On Tue, Jul 22, 2014 at 9:41 PM, Daniel Victoria daniel.victo...@gmail.commailto:daniel.victo...@gmail.com wrote: Hi Raphael, This is what I did some time ago when I had the same problem 1) Find out the overall minimun and maximum precipitation over all maps. 2) Use r.colors with the rules option to compose a colortable that cover my entire precip range. 3) Apply the same colortable to all maps 4) plot and be happy Hope it helps Daniel On Tue, Jul 22, 2014 at 10:01 PM, raphael.viscarra-ros...@csiro.aumailto:raphael.viscarra-ros...@csiro.au wrote: Hello I wonder if anyone knows how to create a common colour scale for different raster maps? I want to display all six maps on the same page with the single colour scale but I cannot find how to do this in GRASS. More specifically, I have six raster maps of rainfall for different time periods (each has a different range of values) and I would like to display them all with the same colour scale. The colour scale needs to be constructed using the min and max values of the set of six maps (and not just individual maps. Will appreciate any input please. Thank you, Raphael. __ Raphael VISCARRA ROSSEL | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945tel:%2B61%202%206246%205945 | m. +61 467 769 364tel:%2B61%20467%20769%20364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011http://www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJhttp://scholar.google.com.au/citations?hl=enuser=KpJdvKEJ ___ grass-user mailing list grass-user@lists.osgeo.orgmailto:grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] create a common colour scale
Hi Raphael, This is what I did some time ago when I had the same problem 1) Find out the overall minimun and maximum precipitation over all maps. 2) Use r.colors with the rules option to compose a colortable that cover my entire precip range. 3) Apply the same colortable to all maps 4) plot and be happy Hope it helps Daniel On Tue, Jul 22, 2014 at 10:01 PM, raphael.viscarra-ros...@csiro.au wrote: Hello I wonder if anyone knows how to create a common colour scale for different raster maps? I want to display all six maps on the same page with the single colour scale but I cannot find how to do this in GRASS. More specifically, I have six raster maps of rainfall for different time periods (each has a different range of values) and I would like to display them all with the same colour scale. The colour scale needs to be constructed using the min and max values of the set of six maps (and not just individual maps. Will appreciate any input please. Thank you, Raphael. __ Raphael *VISCARRA ROSSEL* | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945 | m. +61 467 769 364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] create a common colour scale
Hi, in case you use GRASS 7, r.colors accepts multiple maps or a file with the map names. So this should do it: r.colors map=precip1,precip2,precip3 color=precipitation Also, have a look at temporal modules (GRASS 7 only). You can register the series of maps as a dataset (t.create, t.register) and then you can easily get the min, max values for the entire series and there is also t.rast.colors. Anna On Tue, Jul 22, 2014 at 9:41 PM, Daniel Victoria daniel.victo...@gmail.com wrote: Hi Raphael, This is what I did some time ago when I had the same problem 1) Find out the overall minimun and maximum precipitation over all maps. 2) Use r.colors with the rules option to compose a colortable that cover my entire precip range. 3) Apply the same colortable to all maps 4) plot and be happy Hope it helps Daniel On Tue, Jul 22, 2014 at 10:01 PM, raphael.viscarra-ros...@csiro.au wrote: Hello I wonder if anyone knows how to create a common colour scale for different raster maps? I want to display all six maps on the same page with the single colour scale but I cannot find how to do this in GRASS. More specifically, I have six raster maps of rainfall for different time periods (each has a different range of values) and I would like to display them all with the same colour scale. The colour scale needs to be constructed using the min and max values of the set of six maps (and not just individual maps. Will appreciate any input please. Thank you, Raphael. __ Raphael *VISCARRA ROSSEL* | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945 | m. +61 467 769 364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] create a common colour scale
On Tue, Jul 22, 2014 at 10:46 PM, raphael.viscarra-ros...@csiro.au wrote: Thank you Daniel and Anna for the suggestions. Daniel, I wonder how I might display the ‘common’ colour legend when visualising the maps? When the maps are visualised, the colour legend changes to the min max of the current map displayed. Look at range option. You have to know the min/max values though. I am not sure what's the best option in grass64. r.series would work but it creates maps which is unnecessary. Anna, I use GRASS 6.4.2 – so I guess I should upgrade… I would recommend that. Thank you again. Raphael. __ Raphael *VISCARRA ROSSEL* | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945 | m. +61 467 769 364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJ From: Anna Petrášová kratocha...@gmail.com Date: Wednesday, 23 July 2014 12:15 pm To: Daniel Victoria daniel.victo...@gmail.com Cc: Viscarra Rossel, Raphael (LW, Black Mountain) raphael.viscarra-ros...@csiro.au, grass grass-user@lists.osgeo.org Subject: Re: [GRASS-user] create a common colour scale Hi, in case you use GRASS 7, r.colors accepts multiple maps or a file with the map names. So this should do it: r.colors map=precip1,precip2,precip3 color=precipitation Also, have a look at temporal modules (GRASS 7 only). You can register the series of maps as a dataset (t.create, t.register) and then you can easily get the min, max values for the entire series and there is also t.rast.colors. Anna On Tue, Jul 22, 2014 at 9:41 PM, Daniel Victoria daniel.victo...@gmail.com wrote: Hi Raphael, This is what I did some time ago when I had the same problem 1) Find out the overall minimun and maximum precipitation over all maps. 2) Use r.colors with the rules option to compose a colortable that cover my entire precip range. 3) Apply the same colortable to all maps 4) plot and be happy Hope it helps Daniel On Tue, Jul 22, 2014 at 10:01 PM, raphael.viscarra-ros...@csiro.au wrote: Hello I wonder if anyone knows how to create a common colour scale for different raster maps? I want to display all six maps on the same page with the single colour scale but I cannot find how to do this in GRASS. More specifically, I have six raster maps of rainfall for different time periods (each has a different range of values) and I would like to display them all with the same colour scale. The colour scale needs to be constructed using the min and max values of the set of six maps (and not just individual maps. Will appreciate any input please. Thank you, Raphael. __ Raphael *VISCARRA ROSSEL* | Principal Research Scientist | CSIRO Land and Water | Bruce E. Butler Laboratory, Clunies Ross St, Black Mountain, Acton ACT 2601 | PO BOX 1666 Canberra ACT 2600 | t. +61 2 6246 5945 | m. +61 467 769 364 | Chair International Union of Soil Science Working Group on Proximal Soil Sensing | www.researcherid.com/rid/B-4061-2011 | scholar.google.com.au/citations?hl=enuser=KpJdvKEJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
