[R-sig-Geo] plotKML kml_layer.Raster problem
Andreas Gros
andigros72 at gmail.com
Wed Nov 12 20:55:15 CET 2014
Thanks guys, but I still get the same error in this little toy example:
library(raster)
library(plotKML)
e.cRampPalette = colorRampPalette(
c("black", "lightgray"), 1,
space=c("Lab"),
interpolate=c("spline"))
pwidth = 50
pheight = 50
r.ex <- extent(0, 1, 0, 1)
pproj <- "+proj=longlat +ellps=WGS84 +datum=WGS84"
raster_layer <- raster(ncols=pwidth, nrows=pheight,
xmn=xmin(r.ex), xmx=xmax(r.ex),
ymn=ymin(r.ex), ymx=ymax(r.ex),
crs=pproj)
values(raster_layer) <- rep(1, pwidth*pheight)
kml_open(file.name="test.kml",
folder.name='top_folder',
kml_visibility=TRUE)
kml_layer.Raster(raster_layer, folder.name='raster_sub_folder',
plot.legend=TRUE,
metadata=NULL,
colour=names(raster_layer)[1],
colour_scale=e.cRampPalette(255),
raster_name='raster_layer',
layer.name=names(raster_layer)[1],
png.width=50,
png.height=50
)
kml_close(file.name="test.kml")
>
Error in setValues(x, value) :
values must be numeric, integer, logical or factor
> names(raster_layer)[1]
[1] "layer"
> raster_layer[["layer"]]
class : RasterLayer
dimensions : 50, 50, 2500 (nrow, ncol, ncell)
resolution : 0.02, 0.02 (x, y)
extent : 0, 1, 0, 1 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=longlat +ellps=WGS84 +datum=WGS84
data source : in memory
names : layer
values : 1, 1 (min, max)
> traceback()
6: stop("values must be numeric, integer, logical or factor")
5: setValues(x, value)
4: setValues(x, value)
3: `values<-`(`*tmp*`, value = "layer")
2: `values<-`(`*tmp*`, value = "layer")
1: kml_layer.Raster(raster_layer, folder.name = "raster_sub_folder",
plot.legend = TRUE, metadata = NULL, colour = names(raster_layer)[1],
colour_scale = e.cRampPalette(255), raster_name = "raster_layer",
layer.name = names(raster_layer)[1], png.width = 50, png.height = 50)
>
On Mon, Nov 10, 2014 at 2:01 AM, Tomislav Hengl <hengl at spatial-analyst.net>
wrote:
>
>
> The argument "colour" is reserved for the target variable (name,
function/call or vector). plotKML allows users to visualize multiple
variables using different aesthetics (
http://plotkml.r-forge.r-project.org/aesthetics.html), so in your case this
would be "colour = layer, colour_scale = e.cRampPalette(255)", although it
might take you few iterations until you get the right legend / PNG output.
>
> To learn how to use lower level functions such as kml_layer.Raster maybe
first study the package vignette (
http://cran.r-project.org/web/packages/plotKML/vignettes/jss1079.pdf)
and/or the package tutorial (
http://gsif.isric.org/doku.php?id=wiki:tutorial_plotkml).
>
> Sorry for some confusion between "colour" and "colour_scale".
>
> T. Hengl
>
>
>
> On 8-11-2014 1:12, Andreas Gros wrote:
>>
>> Hi Frede,
>>
>> This is the test case (using just values of 1): (traceback() below)
>>
>> pheight = 100
>> pwidth = 200
>>
>>> raster_layer <- raster(ncols=pwidth, nrows=pheight,
>>
>> + xmn=xmin(r.ex), xmx=xmax(r.ex),
>> + ymn=ymin(r.ex), ymx=ymax(r.ex),
>> + crs=CRS(projection(bigraster)))
>>>
>>> values(raster_layer) <- rep(1, pwidth*pheight)
>>
>>
>>
>>> kml_open(file.name="test.kml",
>>
>> + folder.name='top_folder',
>> + kml_visibility=TRUE)
>> KML file opened for writing...
>>>
>>> kml_layer.Raster(raster_layer, folder.name='raster_sub_folder',
>>
>> + plot.legend=TRUE,
>> + metadata=NULL,
>> + colour=e.cRampPalette(255),
>> + raster_name='raster_layer',
>> + layer.name=names(raster_layer)[1],
>> + png.width=1000,
>> + png.height=833
>> + )
>>
>> Error in setValues(x, value) :
>> values must be numeric, integer, logical or factor
>>
>>> kml_close(file.name="test.kml")
>>
>>
>> Closing test.kml
>>
>> Traceback:
>> traceback()
>> 6: stop("values must be numeric, integer, logical or factor")
>> 5: setValues(x, value)
>> 4: setValues(x, value)
>> 3: `values<-`(`*tmp*`, value = c("#000000", "#010101", "#020202",
>> "#030303", "#040404", "#060606", "#070707", "#080808", "#090909",
>> "#0A0A0A", "#0C0C0C", "#0D0D0D", "#0E0E0E", "#0F0F0F", "#0F0F0F",
>> "#101010", "#111111", "#121212", "#131313", "#141414", "#141414",
>> "#151515", "#161616", "#161616", "#171717", "#181818", "#181818",
>> "#191919", "#1A1A1A", "#1A1A1A", "#1B1B1B", "#1C1C1C", "#1C1C1C",
>> "#1D1D1D", "#1E1E1E", "#1E1E1E", "#1F1F1F", "#202020", "#202020",
>> "#212121", "#222222", "#222222", "#232323", "#242424", "#242424",
>> "#252525", "#262626", "#272727", "#272727", "#282828", "#292929",
>> "#292929", "#2A2A2A", "#2B2B2B", "#2B2B2B", "#2C2C2C", "#2D2D2D",
>> "#2E2E2E", "#2E2E2E", "#2F2F2F", "#303030", "#303030", "#313131",
>> "#323232", "#333333", "#333333", "#343434", "#353535", "#363636",
>> "#363636", "#373737", "#383838", "#383838", "#393939", "#3A3A3A",
>> "#3B3B3B", "#3B3B3B", "#3C3C3C", "#3D3D3D", "#3E3E3E", "#3E3E3E",
>>
>> ...
>>
>> ))
>>
>> 2: `values<-`(`*tmp*`, value = c("#000000", "#010101", "#020202",
>> "#030303", "#040404", "#060606", "#070707", "#080808", "#090909",
>> "#0A0A0A", "#0C0C0C", "#0D0D0D", "#0E0E0E", "#0F0F0F", "#0F0F0F",
>> "#101010", "#111111", "#121212", "#131313", "#141414", "#141414",
>> "#151515", "#161616", "#161616", "#171717", "#181818", "#181818",
>> "#565656", "#575757", "#585858", "#595959", "#5A5A5A", "#5A5A5A",
>> ...
>>
>> ))
>>
>> 1: kml_layer.Raster(raster_layer, folder.name = "raster_sub_folder",
>> plot.legend = TRUE, metadata = NULL, colour =
e.cRampPalette(255),
>> raster_name = "raster_layer", layer.name =
names(raster_layer)[1],
>> png.width = 1000, png.height = 833)
>>
>>
>> And when I'm trying to use colour_scheme I'm gettiing an error that lets
me
>> assume that kml_layer.Raster is not compatible with 'raster':
>>
>> kml_open(file.name="test.kml",
>> + folder.name='top_folder',
>> + kml_visibility=TRUE)
>> KML file opened for writing...
>>>
>>> kml_layer.Raster(raster_layer, folder.name='raster_sub_folder',
>>
>> + plot.legend=TRUE,
>> + metadata=NULL,
>> + colour_scheme=e.cRampPalette(255),
>> + raster_name='raster_layer',
>> + layer.name=names(raster_layer)[1],
>> + png.width=1000,
>> + png.height=833
>> + )
>>
>> Error in is.factor(obj at data[, 1]) :
>> error in evaluating the argument 'x' in selecting a method for
function
>> 'is.factor': Error in obj at data[, 1] : object of type 'S4' is not
subsettable
>>
>>> kml_close(file.name="test.kml")
>>
>> Closing test.kml
>>
>>> traceback()
>>
>> 2: is.factor(obj at data[, 1])
>> 1: kml_layer.Raster(raster_layer, folder.name = "raster_sub_folder",
>> plot.legend = TRUE, metadata = NULL, colour_scheme =
>> e.cRampPalette(255),
>> raster_name = "raster_layer", layer.name =
names(raster_layer)[1],
>> png.width = 1000, png.height = 833)
>>
>> On Thu, Nov 6, 2014 at 10:52 PM, Frede Aakmann Tøgersen <frtog at vestas.com
>
>> wrote:
>>
>>> Hi Andreas
>>>
>>> Can you provide a small example showing the details of what you're
trying
>>> to do. I don't think that anyone can help you with the little
information
>>> you have given.
>>>
>>> If you do not have any example please show us the output from
traceback()
>>> immediately after the error.
>>>
>>> I don't think this has anything to do with NA's in your data values as I
>>> don't get any errors doing this (from man of kml_layer.Raster):
>>>
>>>
>>> data(eberg_grid)
>>> library(sp)
>>> coordinates(eberg_grid) <- ~x+y
>>> gridded(eberg_grid) <- TRUE
>>> proj4string(eberg_grid) <- CRS("+init=epsg:31467")
>>> data(SAGA_pal)
>>> library(raster)
>>> r <- raster(eberg_grid["TWISRT6"])
>>>
>>> ## Put some NA's into data
>>> r at data@values[1:10] <- NA
>>>
>>> kml(r, colour_scale = SAGA_pal[[1]], colour = TWISRT6)
>>>
>>>
>>>
>>>
>>> Yours sincerely / Med venlig hilsen
>>>
>>>
>>> Frede Aakmann Tøgersen
>>> Specialist, M.Sc., Ph.D.
>>> Plant Performance & Modeling
>>>
>>> Technology & Service Solutions
>>> T +45 9730 5135
>>> M +45 2547 6050
>>> frtog at vestas.com
>>> http://www.vestas.com
>>>
>>> Company reg. name: Vestas Wind Systems A/S
>>> This e-mail is subject to our e-mail disclaimer statement.
>>> Please refer to www.vestas.com/legal/notice
>>> If you have received this e-mail in error please contact the sender.
>>>
>>>
>>>> -----Original Message-----
>>>> From: r-sig-geo-bounces at r-project.org [mailto:r-sig-geo-bounces at r-
>>>> project.org] On Behalf Of Andreas Gros
>>>> Sent: 6. november 2014 23:47
>>>> To: r-sig-geo at r-project.org
>>>> Subject: [R-sig-Geo] plotKML kml_layer.Raster problem
>>>>
>>>> In version 0.4-6 of plotKML, when I'm adding a kml_layer.Raster (single
>>>> layer, no stack/brick) to a kml file, I get the following error
message:
>>>>
>>>> Error in setValues(x, value) :
>>>> values must be numeric, integer, logical or factor
>>>>
>>>>
>>>> The values in the raster range between -57 and 2000 and it also occurs
>>>
>>> if I
>>>>
>>>> replace NA values first with some arbitrary numerical value.
>>>> Has anyone come across this problem and knows how to fix/circumnavigate
>>>> it?
>>>>
>>>> Thanks!
>>>>
>>>> [[alternative HTML version deleted]]
>>>>
>>>> _______________________________________________
>>>> R-sig-Geo mailing list
>>>> R-sig-Geo at r-project.org
>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>
>>>
>>
>> [[alternative HTML version deleted]]
>>
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