Re: [GRASS-user] i.cluster and i.maxlik with grayscale image
Dylan Beaudette wrote: On Thu, Jan 1, 2009 at 10:57 AM, Micha Silver mi...@arava.co.il wrote: One set of aerial photos are from the 1950's -1960's. These are all black and white photos: single band tiff. The newer set of aerial photos are color images from 2005-2007. The region is a savanna area with sparse trees and bushes. We need to compare how many trees, and their size, 50 years ago with the situation today. Any additional pointers are most welcome. Thanks, Micha Hi Micha, i.smap has worked well for our studies in Oak Woodland ecosystems. Here is an example using RGB imagery: http://casoilresource.lawr.ucdavis.edu/drupal/node/548 Dylan Hi Dylan: Thanks for the reminder. I had seen your excellent howto's in the past, and again I have the chance to apply one of them. I'm pleased to say that the process worked famously. Micha ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] i.cluster and i.maxlik with grayscale image
Happy New Year to all! I want to run some r.le analyses on rasters I will create from two ortho-photo images. The newer ortho-photo is full color, so when importing into GRASS I get the three RGB bands. So I make an image group and subgroup with the three bands and I can do the clustering. However The older image is a B/W tiff, so it becomes a single grayscale raster. But the classification modules require a group with more than one band. What's the best way to handle this? Thanks, Micha ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] i.cluster and i.maxlik with grayscale image
On Thu, Jan 1, 2009 at 4:06 PM, Micha Silver mi...@arava.co.il wrote: Happy New Year to all! Happy New Year! I want to run some r.le analyses on rasters I will create from two [please consider r.li which way faster] ortho-photo images. The newer ortho-photo is full color, so when importing into GRASS I get the three RGB bands. So I make an image group and subgroup with the three bands and I can do the clustering. However The older image is a B/W tiff, so it becomes a single grayscale raster. But the classification modules require a group with more than one band. What's the best way to handle this? Note that the i.smap module also works with single-image groups. What means The older image above? It's not entirely clear to me what you plan to do. Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] i.cluster and i.maxlik with grayscale image
Markus Neteler wrote: On Thu, Jan 1, 2009 at 4:06 PM, Micha Silver mi...@arava.co.il wrote: Happy New Year to all! Happy New Year! I want to run some r.le analyses on rasters I will create from two [please consider r.li which way faster] Thanks for the tip. ortho-photo images. The newer ortho-photo is full color, so when importing into GRASS I get the three RGB bands. So I make an image group and subgroup with the three bands and I can do the clustering. However The older image is a B/W tiff, so it becomes a single grayscale raster. But the classification modules require a group with more than one band. What's the best way to handle this? Note that the i.smap module also works with single-image groups. OK, I'll have a look. What means The older image above? It's not entirely clear to me what you plan to do. One set of aerial photos are from the 1950's -1960's. These are all black and white photos: single band tiff. The newer set of aerial photos are color images from 2005-2007. The region is a savanna area with sparse trees and bushes. We need to compare how many trees, and their size, 50 years ago with the situation today. Any additional pointers are most welcome. Thanks, Micha Markus This mail was received via Mail-SeCure System. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] i.cluster and i.maxlik with grayscale image
On Thu, Jan 1, 2009 at 10:57 AM, Micha Silver mi...@arava.co.il wrote: One set of aerial photos are from the 1950's -1960's. These are all black and white photos: single band tiff. The newer set of aerial photos are color images from 2005-2007. The region is a savanna area with sparse trees and bushes. We need to compare how many trees, and their size, 50 years ago with the situation today. Any additional pointers are most welcome. Thanks, Micha Hi Micha, i.smap has worked well for our studies in Oak Woodland ecosystems. Here is an example using RGB imagery: http://casoilresource.lawr.ucdavis.edu/drupal/node/548 Dylan ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
