Displaying 11 results from an estimated 11 matches for "writegd".
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writed
2008 Nov 05
1
Using RGDAL to "copy" header information...
...')
outcon <- file(outfile, "wb")
infile_info=GDALinfo(infile)
nl=infile_info[[1]]
ns=infile_info[[2]]
for (row in 1:nl) {
templine <- readGDAL(infile,region.dim=c(1,ns),offset=c(row-1,0))
writeBin(templine[[1]], outcon,size=4)
}
close(outcon)
# Below doesn't work
# writeGDAL(templine,outfile_base,drivername='EHdr',type="Float32")
###
The issue is this: I need to be able to effectively copy the
geographic/header information from the input file (the last line almost
works, but as you can see it sets the line #s to 1, not "ns"), and parse...
2007 Sep 05
1
geotiff or tiff files with world files
Hi,
I have a matrix of data which i can vizualize as an image - for example. I would like to save this image as a geotiff file or at a tiff file with a world file which holds the projection of my data (ultimately the data represent a map of some sort). I know i can save the data as an ESRI grid, but i am not interested in that.
I wonder if anybody knows about any code which will help me do
2011 Sep 01
1
save grid
Hi
I have a problem for saving grid file in R. I want to save a grid file as "tif".
I write this: writeGDAL(predict.grid, 'predict.tif')
after running, I don't recieve any error. But when I want to open the 'file.tif', it doesn't open.
for example in paint program: I recieve this: Paint cannot read this file.
This is not valid bitmap file, or its format is not currently supp...
2012 Dec 26
1
Change class of elements in list
...This works for a single object of class "im":
a <- mylist$sp1
b <- as(a, "SpatialGridDataFrame")
Then I want to write each element in the new list as a TIFF file, with the name of the elements in the list.
This also works for a single object in package "rgdal":
writeGDAL(b, "sp1.TIFF")
Many thanks,
Robin
[[alternative HTML version deleted]]
2012 Feb 24
1
Producing KML files
...at the following web page:
http://spatial-analyst.net/wiki/index.php?title=Export_maps_to_GE
The lines that I can run are:
data(meuse.grid)
coordinates(meuse.grid) <- ~x+y
gridded(meuse.grid) <- TRUE
proj4string(meuse.grid) = CRS("+init=epsg:28992")
# raster to polygon conversion;
writeGDAL(meuse.grid["soil"], "meuse_soil.sdat", "SAGA", mvFlag=-99999)
rsaga.geoprocessor(lib="shapes_grid", module=6,
param=list(GRID="meuse_soil.sgrd", POLYGONS="meuse_soil.shp", CLASS_ALL=1))
and it crashes there with t...
2007 Sep 06
1
write geotiff with projection - RGDAL package
....grid <- read.csv(x, header=TRUE)
gridded(data.grid) = ~East.m.+North.m.
proj4string(data.grid) = CRS("+proj=tmerc +lat_0=0.00000000000 +lon_0=-81.00000000000 +k=0.99960000 +x_0=500000.000000 +y_0=0.0000000 +ellps=GRS80 +units=m")
tr <- "e:\\JELA_veg\\test_gtiff\\test.tif"
writeGDAL(data.grid["class.pca"], tr)
mg3 <- readGDAL(tr)
proj4string(mg3)
[1] " +proj=utm +zone=17 +ellps=GRS80 +units=m +no_defs"
I will really appreciate if anybody can point me in the right dirrection.
Thanks,
Monica
____________________________________________________...
2009 Mar 08
0
image2GRID
...the attribute that i would like to convert to
image. This part work, i get an image
drawn...
out <- image2Grid(im) # here I get this message : Error in image2Grid(im) :
image must have components x,
y, and z
writeGDAL(out, "out.tif")
Thanks for the help, m
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2010 Mar 22
2
importing .bil files
Dear list
Has anyone got a recipie at hand to import .bil files into R? From
what I understand the .bil files I got contain layered matricies which
I would lke to make available in R as an array or list.
GIS people seem to be familiar with the .bil format but I am not using
any GIS software and would prefer to deal with the data in R.
I use the latest version of R on Mac OSX 10.5.8.
2010 Oct 18
1
Incorrect positioning of raster images on Windows
I am working on dumping raster data from R into PNG files using
rasterImage(). I am working with a test matrix from the rasterImage()
example and using it to produce a PNG image with the following code:
# From the example for rasterImage(). A 3 pixel by 5 pixel b/w checkerboard.
testImage <- as.raster(0:1, nrow=3, ncol=5)
testImage
[,1] [,2] [,3] [,4] [,5]
[1,]
2010 Oct 18
1
Incorrect positioning of raster images on Windows
I am working on dumping raster data from R into PNG files using
rasterImage(). I am working with a test matrix from the rasterImage()
example and using it to produce a PNG image with the following code:
# From the example for rasterImage(). A 3 pixel by 5 pixel b/w checkerboard.
testImage <- as.raster(0:1, nrow=3, ncol=5)
testImage
[,1] [,2] [,3] [,4] [,5]
[1,]
2012 May 08
2
PPM to BMP converter
Dear all,
Several days ago, I posted How to write a bmp file pixel by pixel. Instead of bmp, I succeeded in writing a PPM file by using the pixmap package. Thanks for the hint generously provided by Uwe Ligges.
Now I have a new question. How to convert a PPM file to BMP file in R? I know I can do this in photoshop or by some other softwares, but I think if I Can do this in R, that