[GRASS-user] Difference in sunset/sunrise time between r.sun and r.sunmask
Dear Group! Happy New Year @all! I work on a Linux GRASS 6.4.2 RC1. The area of interest is in central Europe and the projection is WGS84(EPSG:4326). When I use the r.sun module and let it show the sunset/sunrise time and compare it with the sunset/sunrise from a map created with r.sunmask I see great differences (up to 50 minutes). It is not the timezone (which is set correctly) in r.sunmask. The results from r.sunmask seem to be, according to other sources, seem to be right, but the results from r.sun are fare off. Please give a suggestions or help! Stefan ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Difference in sunset/sunrise time between r.sun and r.sunmask
If you use R there is a sunrise.set function in the StreamMetabolism package (shameless promotion). That may be helpful. Stephen Sefick On 01/02/2012 06:57 AM, Büro Seling wrote: Dear Group! Happy New Year @all! I work on a Linux GRASS 6.4.2 RC1. The area of interest is in central Europe and the projection is WGS84(EPSG:4326). When I use the r.sun module and let it show the sunset/sunrise time and compare it with the sunset/sunrise from a map created with r.sunmask I see great differences (up to 50 minutes). It is not the timezone (which is set correctly) in r.sunmask. The results from r.sunmask seem to be, according to other sources, seem to be right, but the results from r.sun are fare off. Please give a suggestions or help! Stefan ___ 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] Difference in sunset/sunrise time between r.sun and r.sunmask
Am 02.01.2012 16:19, schrieb Stephen Sefick: If you use R there is a sunrise.set function in the StreamMetabolism package (shameless promotion). That may be helpful. Stephen Sefick On 01/02/2012 06:57 AM, Büro Seling wrote: Dear Group! Happy New Year @all! I work on a Linux GRASS 6.4.2 RC1. The area of interest is in central Europe and the projection is WGS84(EPSG:4326). When I use the r.sun module and let it show the sunset/sunrise time and compare it with the sunset/sunrise from a map created with r.sunmask I see great differences (up to 50 minutes). It is not the timezone (which is set correctly) in r.sunmask. The results from r.sunmask seem to be, according to other sources, seem to be right, but the results from r.sun are fare off. Please give a suggestions or help! Stefan ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user Thanks for Your suggestion Stephen, but I have to make shadow maps with r.sun and my problem is how to get r.sun work within the correct sunrise/sunset timespan. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS doesn't find rasters after renaming mapset
Hi Daniel, On Mon, Jan 2, 2012 at 2:19 AM, Daniel Lee l...@isi-solutions.org wrote: Hi there, Happy New Year's first of all :) Something strange is happening when I rename mapsets. When renaming a mapset, remember to update the SEARCH_PATH file since it contains the mapset name. This is a common trap which I fell into regularly. I asked to get this fixed which has happened in GRASS 7 in http://trac.osgeo.org/grass/changeset/46173 My attempts to backport this to GRASS 6 failed... So, for now, just update the SEARCH_PATH ASCII file and it will work again. But I think we should really get r46173 backported. Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to create 500m DEM from 90m DEM
2012/1/2 sgw00...@nifty.com: Dear Markus and all Of course - the vector is just used to find the target area of the raster map. Yes, I understood it. Thanks. So, at web site grass manual, I found 'r.resamp.interp' command. When I would like to create this under same datum and projection with only difference resolutions, then may I use this command ? no, it should be r.resamp.stats: http://grass.osgeo.org/wiki/Interpolation#Resampling_of_raster_maps_to_coarser_resolution (r.resamp.interp is used to reach finer resolution, see the same Wiki page). Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: Re: [GRASS-user] How to create 500m DEM from 90m DEM
Dear Markus and all Thank you for your useful advice. no, it should be r.resamp.stats: http://grass.osgeo.org/wiki/Interpolation#Resampling_of_raster_maps_to_coarse r_resolution I visited this site and checked 'finer', 'coarser' and 'sparse'. My case is 'coarser' (90m - 500m), so it should be used 'r.resamp.stats', I s ee. Thanks Best, Yasuo shimada: Japan weather association - Original Message - From: Markus Neteler nete...@osgeo.org Date: Mon, 2 Jan 2012 21:40:37 +0100 Subject: Re: [GRASS-user] How to create 500m DEM from 90m DEM To: sgw00...@nifty.com Cc: GRASS user list grass-user@lists.osgeo.org 2012/1/2 sgw00...@nifty.com: Dear Markus and all Of course - the vector is just used to find the target area of the raster map. Yes, I understood it. Thanks. So, at web site grass manual, I found 'r.resamp.interp' command. When I would like to create this under same datum and projection with only difference resolutions, then may I use this command ? no, it should be r.resamp.stats: http://grass.osgeo.org/wiki/Interpolation#Resampling_of_raster_maps_to_coarse r_resolution (r.resamp.interp is used to reach finer resolution, see the same Wiki page). Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
