Thanks, Thomas I'll check it out. Thanks a lot, Helmut for your detailed description. If we could complete this task we will be definitely contributing for updating the manual. Regards everyone...
On Sun, 5 Aug 2018 at 17:55, Thomas Adams <[email protected]> wrote: > Kalindu, > > To import your files use v.in.ogr if an Excel spreadsheet or v.in.ascii if > you have converted it to an ascii text file. You need to read the > documentation and do some internet Google Searches to learn more. > > Tom > > On Sun, Aug 5, 2018 at 2:04 AM, Kalindu Perera <[email protected]> > wrote: > >> Hi Thomas >> >> As I said earlier we are in the process of creating one file which has >> lat/long coordinates as well as relevant point measurements like wind >> velocity, wind direction etc... as you said required for importing the data >> to the Grass GIS >> Just assume that we have that file. >> We need the mechanism for converting that file for importing as a >> wildfire simulation data set to run in the GrassGIS >> As you said here >> (6) once the data file is structured to contain the spatial coordinates, >> it can be easily imported into GRASS as I posted previously >> How can we import it to the Grass GIS as a data set? >> >> Thanks a lot....!!!!!!!..Thomas for your patience replies >> Thanks, Rich and Helmut as well for your information... >> >> On Sun, 5 Aug 2018 at 08:47, Thomas Adams <[email protected]> wrote: >> >>> Vidura, >>> >>> Not sure I understand what you're saying, but if I understand -- at >>> least what I have been saying still holds: >>> >>> (1) I have not looked at what fire simulation in GRASS requires (so, >>> some of what I have written may be wrong) >>> (2) each variable requires a latitude-longitude location -- a point >>> measurement, such as wind speed or relative humidity >>> (3) all the data can be in a single file, structured the way the Excel >>> spreadsheet is structured, EXCEPT that... >>> (4) presumably, each row is a point location identified by a station ID >>> -- it MUST have spatial coordinates, such as lat-long >>> (5) so, as it stands, the rows do NOT have the spatial coordinates -- >>> this is REQUIRED >>> (6) once the data file is structured to contain the spatial coordinates, >>> it can be easily imported into GRASS as I posted previously >>> (7) once the point data is imported with all the attributes, like wind >>> speed, relative humidity, etc. at each point... >>> (8) spatial interpolation is probably needed, such as inverse distance >>> weighting, ordinary or universal kriging... for EACH VARIABLE (one issue is >>> keeping the data spatially consistent between variable, like temperature >>> and relative humidity, which should probably vary together in a correlated >>> way)... >>> (9) run the GRASS fire simulation module, provided you have the >>> necessary data. >>> >>> Note: if the point data is for different dates/times, multiple files are >>> needed named according to the date/time >>> >>> Tom >>> >>> >>> >>> >>> On Sat, Aug 4, 2018 at 4:50 PM, Vidura Dantanarayana <[email protected] >>> > wrote: >>> >>>> Hi all, >>>> >>>> I think what kalindu asks is, he got the location and how to create the >>>> elevation raster map for that coordination, he got the humidity and how to >>>> create the humidity raster file, he got the wind speed reading and how to >>>> create wind speed raster file, like on and on. Are there any manuals or >>>> tutorials for creating these files? Thank you. Have a wonderful day guys!! >>>> >>>> BR, >>>> Vidura Dantanarayana. >>>> >>>> >>>> On Sun, Aug 5, 2018 at 5:34 AM Thomas Adams <[email protected]> wrote: >>>> >>>>> Kalindu, >>>>> >>>>> I do not see any lat/long coordinates. Do you have them in a separate >>>>> file by station ID. As Rich Shepard suggested, it is far best to have all >>>>> the data in a single file including the lat/long locations for the station >>>>> IDs. >>>>> >>>>> Tom >>>>> >>>>> On Sat, Aug 4, 2018 at 12:58 PM, Kalindu Perera <[email protected]> >>>>> wrote: >>>>> >>>>>> Hi Thomas, >>>>>> Yes, the starting point is latitude and longitude coordinates. >>>>>> It's actually not 2 columns. It has a separate column for each one >>>>>> slope. elevation etc... The data for each wildfire is presented in rows. >>>>>> I'll attach a dataset which has the data about the wildfire spread >>>>>> and starting point and a weather dataset another file. we are currently >>>>>> in >>>>>> a stage of combining those 2 and creating one file which shows the >>>>>> wildfire >>>>>> starting point spread and weather data both on one file. >>>>>> The inputs to the wildfire model in grass GIS use data as separate >>>>>> files. we need to convert our sheet to that type of set of separate data >>>>>> files. >>>>>> You can download the Grass GIS fire simulation dataset clicking here >>>>>> <https://grass.osgeo.org/download/sample-data/> and go to the end of >>>>>> that page. >>>>>> It has the data as a set of files, when extracted go to >>>>>> demolocation->demomapset->cats >>>>>> >>>>>> Thank you ...!!!!!!!! >>>>>> >>>>>> >>>>>> On Sat, 4 Aug 2018 at 19:47, Thomas Adams <[email protected]> wrote: >>>>>> >>>>>>> Kalindu, >>>>>>> >>>>>>> First, I have never done any wildfire modeling and I am not familiar >>>>>>> with the process in GRASS. So, I'm not sure what the requirements are in >>>>>>> GRASS to do this. However, I do not understand how 2 columns of data can >>>>>>> contain "starting point of the fire, slope, wind velocity, wind >>>>>>> direction, >>>>>>> elevation, fuel models and fuel moisture" unless the data are in >>>>>>> separate >>>>>>> rows; but that does not make sense either to me. Is the "starting point >>>>>>> of >>>>>>> the fire" in lat/long coordinates or some other geographic coordinates? >>>>>>> >>>>>>> I really think it would be helpful to see an example dataset with an >>>>>>> explanation. I or others can help you with answering questions about >>>>>>> importing your datasets, but not without this information. >>>>>>> >>>>>>> Best, >>>>>>> Tom >>>>>>> >>>>>>> >>>>>>> On Sat, Aug 4, 2018 at 10:01 AM, Kalindu Perera <[email protected] >>>>>>> > wrote: >>>>>>> >>>>>>>> Hi Thomas, >>>>>>>> >>>>>>>> Thanks a lot for your reply. I'll explain more. >>>>>>>> We have a dataset with data about a wildfire, starting point of the >>>>>>>> fire, slope, wind velocity, wind direction, elevation, fuel models and >>>>>>>> fuel >>>>>>>> moisture. >>>>>>>> That data is in an excel sheet separated into columns. >>>>>>>> we need to convert that data to the format which is like in the >>>>>>>> Grass GIS fire simulation data set. So that we can calculate the >>>>>>>> spread of >>>>>>>> our wildfire using r.ros >>>>>>>> Grass GIS fire simulation data set has data about 1 wildfire and >>>>>>>> the data is presented separately as files. As an example slope is a >>>>>>>> separate file. the elevation is another file >>>>>>>> What we need is how to convert our wildfire data which is in the >>>>>>>> excel sheet to those type of files? >>>>>>>> Is there any script or something to convert? >>>>>>>> >>>>>>>> Thank you..!!!!!! >>>>>>>> >>>>>>>> >>>>>>>> On Sat, 4 Aug 2018 at 18:36, Thomas Adams <[email protected]> wrote: >>>>>>>> >>>>>>>>> Kalindu, >>>>>>>>> >>>>>>>>> I think you need to provide more information. It sounds like you >>>>>>>>> have point data, which means your data should be imported using >>>>>>>>> v.in.ogr or >>>>>>>>> v.in.ascii, if you were to convert you excel file to an ascii text >>>>>>>>> file. >>>>>>>>> >>>>>>>>> Regards, >>>>>>>>> Tom >>>>>>>>> >>>>>>>>> On Sat, Aug 4, 2018 at 3:46 AM, Kalindu Perera < >>>>>>>>> [email protected]> wrote: >>>>>>>>> >>>>>>>>>> Hi everyone, >>>>>>>>>> We have encountered a problem when we trying to convert a >>>>>>>>>> wildfire data set to the format that can be used in the grass GIS. >>>>>>>>>> We have >>>>>>>>>> the data in an excel sheet as records. Grass GIS fire simulation >>>>>>>>>> dataset >>>>>>>>>> has a set of files as the inputs. The format of the data in the >>>>>>>>>> files is >>>>>>>>>> unclear. Is there any conversion method of normal fire data to the >>>>>>>>>> format >>>>>>>>>> that can be used in the Grass GIS?...We have the same input data, we >>>>>>>>>> need >>>>>>>>>> to convert them like the fire simulation data set provided in the >>>>>>>>>> Grass GIS >>>>>>>>>> sample data page. >>>>>>>>>> >>>>>>>>>> Thank you...!!!!!!! >>>>>>>>>> Awaiting a helpful response >>>>>>>>>> >>>>>>>>>> _______________________________________________ >>>>>>>>>> grass-user mailing list >>>>>>>>>> [email protected] >>>>>>>>>> https://lists.osgeo.org/mailman/listinfo/grass-user >>>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> grass-user mailing list >>>>> [email protected] >>>>> https://lists.osgeo.org/mailman/listinfo/grass-user >>>> >>>> > >
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