[GRASS-user] conversion to fire simulation data set in the Grass GIS

Sat Aug 4 20:17:04 PDT 2018

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 <vidurada at gmail.com>
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 <tea3rd at gmail.com> 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 <kkc199408 at gmail.com>
>> 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 <tea3rd at gmail.com> 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 <kkc199408 at gmail.com>
>>>> 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 <tea3rd at gmail.com> 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 <kkc199408 at gmail.com>
>>>>>> 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
>>>>>>> grass-user at lists.osgeo.org
>>>>>>> https://lists.osgeo.org/mailman/listinfo/grass-user
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>>>
>>>>
>>
>>
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>
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