[GRASS-user] rainfall data and a DEM
Hi, Is there a way of merging rainfall data and SRTM DEM (both in GEOTIFF format ) together? The reason I'm asking this is because SRTM DEM (elevation layer) is just a terrain, on top of that terrain I want to measure how much rainfall has fallen to the DEM and which direction is it flowing to. -- Kind Regards TS Gumede Student Researcher Meraka Institute, CSIR office : 012 841 2606 mobile : 072 258 1650 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] rainfall data and a DEM
On 05/28/2010 05:39 PM, Sandile Gumede wrote: Hi, Is there a way of merging rainfall data and SRTM DEM (both in GEOTIFF format ) together? Can you be more specific? What do you mean merge. The reason I'm asking this is because SRTM DEM (elevation layer) is just a terrain, on top of that terrain I want to measure how much rainfall has fallen to the DEM and which direction is it flowing to. Flow direction can be produced from a DEM with the r.watershed module. If what you want is a calculation of how much total rainfall fell in each *catchment*, then first use the r.watershed module to create catchments, then convert the raster catchment map to vector polygons and finally run v.rast.stats on the catchment polygons, using the rainfall raster to calculate how much rain fell on each catchment. -- Micha -- Kind Regards TS Gumede Student Researcher Meraka Institute, CSIR office : 012 841 2606 mobile : 072 258 1650 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 This mail was received via Mail-SeCure System. -- Micha Silver Arava Development Co. +972-52-3665918 http://www.surfaces.co.il ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] rainfall data
2010/5/5 Markus Neteler nete...@osgeo.org: On Wed, May 5, 2010 at 1:36 PM, Sandile Gumede akasand...@gmail.com wrote: which command do I use to model rainfall data in GRASS6? There are several option. See here for GRASS related publications: http://www.citeulike.org/user/neteler/article/4509581 http://www.citeulike.org/user/neteler/article/4078343 Thanks, the publications were great! In the same context, I would like to ask for very simple tips about how to import several rainfall gauge stations. For instance, a csv or txt file with the following columns gauge station name, owner, North, East, annual rainfall, Elevation, max 24 hrs. I have failed from the db.connection or db.in.org (if that is the begining) and the availa Then, it would be nice to link a data serie (date, rain) with its gauge station. Any tips to make it easer will be very welcome, -- Marco Markus ___ 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] rainfall data
You are going to have to be more specific. Are you trying to interpolate a rainfall map from several pluviometric stations or do you have precipitation maps from some other source and want to open them in Grass? To interpolate the rainfall check out the v.surf.* modules Daniel On Wed, May 5, 2010 at 8:36 AM, Sandile Gumede akasand...@gmail.com wrote: which command do I use to model rainfall data in GRASS6? -- Kind Regards TS Gumede Candidate Researcher Meraka Institute, CSIR office : 012 841 2606 mobile : 072 258 1650 ___ 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] rainfall data
You then need to import the data in Grass. After you created the correct location and mapset you can use r.in.gdal to import the data. If your .tiff image has projection information you can use it to create the location Cheers Daniel On Wed, May 5, 2010 at 9:10 AM, Sandile Gumede akasand...@gmail.com wrote: Hi I've got TRMM rainfall data (in .tiff format), I want to do analysis on the data and estimate how much rainfall has fallen to the surface, check if there is possibility for flooding to occur. Which commands to pass to perform this? On Wed, May 5, 2010 at 1:49 PM, Daniel Victoria daniel.victo...@gmail.com wrote: You are going to have to be more specific. Are you trying to interpolate a rainfall map from several pluviometric stations or do you have precipitation maps from some other source and want to open them in Grass? To interpolate the rainfall check out the v.surf.* modules Daniel On Wed, May 5, 2010 at 8:36 AM, Sandile Gumede akasand...@gmail.com wrote: which command do I use to model rainfall data in GRASS6? -- Kind Regards TS Gumede Candidate Researcher Meraka Institute, CSIR office : 012 841 2606 mobile : 072 258 1650 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- Kind Regards TS Gumede Candidate Researcher Meraka Institute, CSIR office : 012 841 2606 mobile : 072 258 1650 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] rainfall data
On Wed, May 5, 2010 at 1:36 PM, Sandile Gumede akasand...@gmail.com wrote: which command do I use to model rainfall data in GRASS6? There are several option. See here for GRASS related publications: http://www.citeulike.org/user/neteler/article/4509581 http://www.citeulike.org/user/neteler/article/4078343 Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
