Re: [R-sig-Geo] Help
Dear Silver,
Thank for your help.
I think there had been a mix-up in the Coordinate Rference System. When I
plot this shapefile I get
it in the UTM Coordinate.
Le Senegal is in Zone 28 North. The watershed on what I work is shared by
trois Countries (Senegal, Gambie and Guinea).
But in the choose of UTM 33 in my script is an error.
Thank very much.
Best regards
Le lun. 13 janv. 2020 à 07:22, Micha Silver a écrit :
> Hello Bakary:
>
> Please keep questions on the list, so that others can benefit from the
> conversation.
>
>
> I see that the Basins shapefile you sent is declared to be in Long/Lat
> WGS84 Coordinate Reference System, however the coordinates (the X-Y
> locations) look like it is already projected to UTM 33. Is it possible
> there is some mixup in the Coordinate Reference System of the Basins
> shapefile?
>
> (That would explain why the basins layer does not appear on your plot)
>
>
> Furthermore, I think that you are working in Senegal/Gambia (from the
> coordinates in the DATAFILE). If so, why did you choose to project to UTM
> 33 in your script? Isn't Senegal in UTM zone 28?
>
>
> Attached is the corrected script (changed to UTM28). The corrected basin
> shapefile is sent privately. (too big for the list)
>
>
> Regards, Micha
>
>
>
>
> On 12/01/2020 21:29, Bakary Faty wrote:
>
> Dear Micha Silver
>
> I'm writing you this email following your contribution on my isohyet map
> code, in 'r-sig-geo'.
>
> I really appreciated your help which helped me a lot. I can draw the
> isohyets but I can't draw the contour of my study basin.
>
> You can see where the problem is in the code to make a change again?
>
> You will find the files of the watershed and my code R attached.
>
> Thank you very much by advance
>
>
> Best regards
>
> Le ven. 10 janv. 2020 à 09:41, Micha Silver a écrit :
>
>>
>> On 09/01/2020 21:02, Bakary Faty wrote:
>> > Thank you for appreciated reply,
>> >
>> > I explane you exactly what I want to do with this R code attached.
>> > I want to adapt this code to my data to build an isohyet map.
>> > But i have some difficulties to adapt it to my case.
>> > I will be very happy when you will help my to adapt this R code
>> (attached)
>> > to my case.
>> > You can find attached the you R code and my data file.
>> > Best regards
>> >
>>
>>
>> I made two small changes in your code, and it works fine:
>>
>> * First I used the suggestion (earlier in this thread) to create your
>> grid.
>> * Then, you had an error in your call to autoKrige.
>> * After getting that right, I created isohyetal lines with
>> rasterToContour
>>
>> Here's my version
>>
>>
>> library(automap)
>> library(raster)
>> library(rgdal)
>>
>> ## READ INPUT FILE
>> rain_data <- read.csv(file="DATAFILE_FOR_ISOHYET.csv")
>>
>> point_coords <- rain_data[c("Lon","Lat")]
>> coordinates(rain_data) <- point_coords
>> p4str <- CRS("+init=epsg:4326")
>> proj4string(rain_data) <- p4str
>>
>> ## CONVERTION TO UTM
>> p4str_UTM <- CRS("+init=epsg:32633")
>> rain_data_UTM <- spTransform(rain_data, p4str_UTM)
>>
>>
>> bb <- bbox(rain_data_UTM)
>> minx <- bb[1,1]
>> maxx <- bb[1,2]
>> miny <- bb[2,1]
>> maxy <- bb[2,2]
>>
>> ## EACH PIXEL WILL BE 1000 METERS
>> pixel <- 1000
>> grd <- expand.grid(x=seq(minx, maxx, by=pixel), y=seq(miny, maxy,
>> by=pixel))
>> coordinates(grd) <- ~x+y
>> gridded(grd) <- TRUE
>> proj4string(grd) <- p4str_UTM
>>
>>
>> ## KRIGING, USING AUTOKRIGE WHICH CREATES A BEST GUESS VARIOGRAM
>> # OK_rain <- autoKrige(Rainfall_value ~ 1, rain_data_UTM, grd)
>> # There is no variable "Rainfall_value" in your data,
>> # It is called RAIN_DATA
>> OK_rain = autoKrige(formula = RAIN_DATA ~1,
>> input_data = rain_data_UTM,
>> new_data = grd)
>>
>> ## TRASFORM TO RASTER
>> rain_rast <- raster(OK_rain$krige_output)
>>
>> summary(rain_rast)
>>
>>
>> # Minimumn is 540, max is 1735
>> # So create isohyetal lines about every 100 mm and plot
>>
>> isohyets = rasterToContour(rain_rast, nlevels = 12)
>> plot(rain_rast)
>> lines(isohyets, add = TRUE)
>>
>>
>> > Le jeu. 9 janv. 2020 à 18:41, Bakary Faty > > <mailto:bakaryf...@gmail.com>> a écrit :
>> >
>> > Thank yo
Re: [R-sig-Geo] Help
Thank you very much for help,
The code works fine but when I add the shapefile of my watershed
I can not plot it.
Le ven. 10 janv. 2020 à 09:41, Micha Silver a écrit :
>
> On 09/01/2020 21:02, Bakary Faty wrote:
> > Thank you for appreciated reply,
> >
> > I explane you exactly what I want to do with this R code attached.
> > I want to adapt this code to my data to build an isohyet map.
> > But i have some difficulties to adapt it to my case.
> > I will be very happy when you will help my to adapt this R code
> (attached)
> > to my case.
> > You can find attached the you R code and my data file.
> > Best regards
> >
>
>
> I made two small changes in your code, and it works fine:
>
> * First I used the suggestion (earlier in this thread) to create your
> grid.
> * Then, you had an error in your call to autoKrige.
> * After getting that right, I created isohyetal lines with
> rasterToContour
>
> Here's my version
>
>
> library(automap)
> library(raster)
> library(rgdal)
>
> ## READ INPUT FILE
> rain_data <- read.csv(file="DATAFILE_FOR_ISOHYET.csv")
>
> point_coords <- rain_data[c("Lon","Lat")]
> coordinates(rain_data) <- point_coords
> p4str <- CRS("+init=epsg:4326")
> proj4string(rain_data) <- p4str
>
> ## CONVERTION TO UTM
> p4str_UTM <- CRS("+init=epsg:32633")
> rain_data_UTM <- spTransform(rain_data, p4str_UTM)
>
>
> bb <- bbox(rain_data_UTM)
> minx <- bb[1,1]
> maxx <- bb[1,2]
> miny <- bb[2,1]
> maxy <- bb[2,2]
>
> ## EACH PIXEL WILL BE 1000 METERS
> pixel <- 1000
> grd <- expand.grid(x=seq(minx, maxx, by=pixel), y=seq(miny, maxy,
> by=pixel))
> coordinates(grd) <- ~x+y
> gridded(grd) <- TRUE
> proj4string(grd) <- p4str_UTM
>
>
> ## KRIGING, USING AUTOKRIGE WHICH CREATES A BEST GUESS VARIOGRAM
> # OK_rain <- autoKrige(Rainfall_value ~ 1, rain_data_UTM, grd)
> # There is no variable "Rainfall_value" in your data,
> # It is called RAIN_DATA
> OK_rain = autoKrige(formula = RAIN_DATA ~1,
> input_data = rain_data_UTM,
> new_data = grd)
>
> ## TRASFORM TO RASTER
> rain_rast <- raster(OK_rain$krige_output)
>
> summary(rain_rast)
>
>
> # Minimumn is 540, max is 1735
> # So create isohyetal lines about every 100 mm and plot
>
> isohyets = rasterToContour(rain_rast, nlevels = 12)
> plot(rain_rast)
> lines(isohyets, add = TRUE)
>
>
> > Le jeu. 9 janv. 2020 à 18:41, Bakary Faty > <mailto:bakaryf...@gmail.com>> a écrit :
> >
> > Thank you for appreciated reply,
> >
> > I explane you exactly what I want to do with this R code attached.
> > I want to adapt this code to my data to build an isohyet map.
> > But i have some difficulties to adapt it to my case.
> > I will be very happy when you will help my to adapt this R code
> > (attached)
> > to my case.
> > You can find attached the you R code, my data file and my sahefile
> > of watershed.
> >
> > Best regards
> >
> >
> > Le jeu. 9 janv. 2020 à 17:47, Ben Tupper > <mailto:btup...@bigelow.org>> a écrit :
> >
> > Welcome to r-sig-geo!
> >
> > I don't think that you haven't provided us enough information
> > so that we can help. On the other hand, does the example
> > below using expand.grid help?
> >
> > minx <- 20
> > maxx <- 25
> > miny <- 31
> > maxy <- 36
> > pixel <- 1
> > grd <- expand.grid(x = seq(minx, maxx, by=pixel), y =
> > seq(miny, maxy, by=pixel))
> >
> > Ben
> >
> > On Thu, Jan 9, 2020 at 11:41 AM Bakary Faty
> > mailto:bakaryf...@gmail.com>> wrote:
> >
> >
> > Dear,
> >
> > I'm writing to express my wish to join R-sig-geo list users.
> > I was doing a search on the net to know how to build an
> > isohyet map and I came across this R code.
> > However, I stumbled upon a problem from the line :
> > grd <- expand.grid(x=seq(minx, maxx, by=pixel),
> > y=seq(miny, maxy, by=pixel)),
> > I get the following error message:
> > default method not implemented for type 'S4'. I want to
> > know how resolve this error.
> >
> > Also, I would like to ask you only at the line level:
&g
Re: [R-sig-Geo] Help
Thanks very much angain, I'll check them out. Best regards Le jeu. 9 janv. 2020 à 19:05, Ben Tupper a écrit : > Your assignments that look like... > > minx <- rain_data_UTM at bbox[1,1] > > are not valid R statements - and that will cause an error. Instead, > obtain a matrix of the bounding box using the bbox() function. Then > extract your coordinates from that. I think you want... > > bb <- bbox(rain_data_UTM) > minx <- bb[1,1] > maxx <- bb[1,2] > miny <- bb[2,1] > maxy <- bb[2,2] > > If you haven't seen this, https://www.rspatial.org/ , it is well worth > your time. There are a lot of other great resources about using spatial > data in R. Try searching the Rseek.org. Like this > https://rseek.org/?q=spatial+tutorials It is a gold mine. > > > On Thu, Jan 9, 2020 at 1:42 PM Bakary Faty wrote: > >> Thank you for appreciated reply, >> >> I explane you exactly what I want to do with this R code attached. >> I want to adapt this code to my data to build an isohyet map. >> But i have some difficulties to adapt it to my case. >> I will be very happy when you will help my to adapt this R code (attached) >> to my case. >> You can find attached the you R code, my data file and my sahefile of >> watershed. >> >> Best regards >> >> >> Le jeu. 9 janv. 2020 à 17:47, Ben Tupper a écrit : >> >>> Welcome to r-sig-geo! >>> >>> I don't think that you haven't provided us enough information so that we >>> can help. On the other hand, does the example below using expand.grid help? >>> >>> minx <- 20 >>> maxx <- 25 >>> miny <- 31 >>> maxy <- 36 >>> pixel <- 1 >>> grd <- expand.grid(x = seq(minx, maxx, by=pixel), y = seq(miny, maxy, >>> by=pixel)) >>> >>> Ben >>> >>> On Thu, Jan 9, 2020 at 11:41 AM Bakary Faty >>> wrote: >>> >>>> >>>> Dear, >>>> >>>> I'm writing to express my wish to join R-sig-geo list users. >>>> I was doing a search on the net to know how to build an isohyet map and >>>> I came across this R code. >>>> However, I stumbled upon a problem from the line : >>>> grd <- expand.grid(x=seq(minx, maxx, by=pixel), y=seq(miny, maxy, >>>> by=pixel)), >>>> I get the following error message: >>>> default method not implemented for type 'S4'. I want to know how >>>> resolve this error. >>>> >>>> Also, I would like to ask you only at the line level: >>>> minx <- rain_data_UTM at bbox[1,1] >>>> maxx <- rain_data_UTM at bbox[1,2] >>>> miny <- rain_data_UTM at bbox[2,1] >>>> maxy <- rain_data_UTM at bbox[2,2], >>>> if I should limit myself to "rain_data_UTM" or write completely: >>>> rain_data_UTM at bbox[,]. >>>> By the way, this is the pointfile I reconstructed. >>>> You can find it attached to the mail. >>>> >>>> Thanks in advance >>>> >>>> Best regards >>>> >>>> >>>> >>>> Bakary >>>> ___ >>>> R-sig-Geo mailing list >>>> R-sig-Geo@r-project.org >>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >>>> >>> >>> >>> -- >>> Ben Tupper >>> Bigelow Laboratory for Ocean Science >>> West Boothbay Harbor, Maine >>> http://www.bigelow.org/ >>> https://eco.bigelow.org >>> >>> >> >> -- >> >> >> >> Bakary >> > > > -- > Ben Tupper > Bigelow Laboratory for Ocean Science > West Boothbay Harbor, Maine > http://www.bigelow.org/ > https://eco.bigelow.org > > -- Bakary [[alternative HTML version deleted]] ___ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
Re: [R-sig-Geo] Help
Thank you for appreciated reply, I explane you exactly what I want to do with this R code attached. I want to adapt this code to my data to build an isohyet map. But i have some difficulties to adapt it to my case. I will be very happy when you will help my to adapt this R code (attached) to my case. You can find attached the you R code and my data file. Best regards Le jeu. 9 janv. 2020 à 18:41, Bakary Faty a écrit : > Thank you for appreciated reply, > > I explane you exactly what I want to do with this R code attached. > I want to adapt this code to my data to build an isohyet map. > But i have some difficulties to adapt it to my case. > I will be very happy when you will help my to adapt this R code (attached) > to my case. > You can find attached the you R code, my data file and my sahefile of > watershed. > > Best regards > > > Le jeu. 9 janv. 2020 à 17:47, Ben Tupper a écrit : > >> Welcome to r-sig-geo! >> >> I don't think that you haven't provided us enough information so that we >> can help. On the other hand, does the example below using expand.grid help? >> >> minx <- 20 >> maxx <- 25 >> miny <- 31 >> maxy <- 36 >> pixel <- 1 >> grd <- expand.grid(x = seq(minx, maxx, by=pixel), y = seq(miny, maxy, >> by=pixel)) >> >> Ben >> >> On Thu, Jan 9, 2020 at 11:41 AM Bakary Faty wrote: >> >>> >>> Dear, >>> >>> I'm writing to express my wish to join R-sig-geo list users. >>> I was doing a search on the net to know how to build an isohyet map and >>> I came across this R code. >>> However, I stumbled upon a problem from the line : >>> grd <- expand.grid(x=seq(minx, maxx, by=pixel), y=seq(miny, maxy, >>> by=pixel)), >>> I get the following error message: >>> default method not implemented for type 'S4'. I want to know how resolve >>> this error. >>> >>> Also, I would like to ask you only at the line level: >>> minx <- rain_data_UTM at bbox[1,1] >>> maxx <- rain_data_UTM at bbox[1,2] >>> miny <- rain_data_UTM at bbox[2,1] >>> maxy <- rain_data_UTM at bbox[2,2], >>> if I should limit myself to "rain_data_UTM" or write completely: >>> rain_data_UTM at bbox[,]. >>> By the way, this is the pointfile I reconstructed. >>> You can find it attached to the mail. >>> >>> Thanks in advance >>> >>> Best regards >>> >>> >>> >>> Bakary >>> ___ >>> R-sig-Geo mailing list >>> R-sig-Geo@r-project.org >>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >>> >> >> >> -- >> Ben Tupper >> Bigelow Laboratory for Ocean Science >> West Boothbay Harbor, Maine >> http://www.bigelow.org/ >> https://eco.bigelow.org >> >> > > -- > > > > Bakary > -- Bakary DATAFILE_FOR_ISOHYET.csv Description: MS-Excel spreadsheet R_code_for_rainfall_isohyet_map.R Description: Binary data ___ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
[R-sig-Geo] Help
Dear, I'm writing to express my wish to join R-sig-geo list users. I was doing a search on the net to know how to build an isohyet map and I came across this R code. However, I stumbled upon a problem from the line : grd <- expand.grid(x=seq(minx, maxx, by=pixel), y=seq(miny, maxy, by=pixel)), I get the following error message: default method not implemented for type 'S4'. I want to know how resolve this error. Also, I would like to ask you only at the line level: minx <- rain_data_UTM at bbox[1,1] maxx <- rain_data_UTM at bbox[1,2] miny <- rain_data_UTM at bbox[2,1] maxy <- rain_data_UTM at bbox[2,2], if I should limit myself to "rain_data_UTM" or write completely: rain_data_UTM at bbox[,]. By the way, this is the pointfile I reconstructed. You can find it attached to the mail. Thanks in advance Best regards Bakary pointfile.csv Description: MS-Excel spreadsheet ___ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
