Questions tagged [rgdal]
R Bindings for the Geospatial Data Abstraction Library
212
questions
2
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1
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194
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Fast way to convert raster to polygon shapefile in R
I have a single-band raster showing different land cover classes. I want to convert it to a polygon shapefile. I tried to use the rasterToPolygons function with the option to dissolve neighboring ...
- 43
0
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0
answers
48
views
How to intersect shapefile with polygons in R properly?
I have a WI shapefile (https://data-wi-dnr.opendata.arcgis.com/datasets/wi-dnr::wisconsin-state-boundary-24k/explore?location=44.747223%2C-89.836300%2C8.20) and a grid that I want to intersect so that ...
- 145
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0
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24
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What (if any) coordinate systems can be used so that distances can be calculated from coordinates?
I am trying to do some work that involves spatiotemporal latent surface modeling, but an issue that I am worried about is that calculating distance between two coordinates is quite a bit more ...
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2
votes
1
answer
157
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Plot a tidy map of English regions
I'm trying to plot a tidy map of English regions in R. I'm using code that runs successfully on other shapefiles, but when I run this the code executes without error, but then just presents a blank ...
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0
votes
1
answer
85
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Merging .tif files via gdalbuildvrt not working
I have a piece of code in R that I have used for a while now to transform .xyz files to .tif and then merge all those .tif files into one big .tif. It has worked well when I last used it 2 years ago, ...
- 43
0
votes
1
answer
265
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Changing spatialpolygonsdataframe to default longitude/latitude (degrees) using R
I am trying (and failing) to convert the coordinates in a spatial object (Spatialpolygonsdataframe) form easting/northing to latitude/longitude. The zone is 35S.
I know it can be achieved with ...
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1
vote
1
answer
567
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Read geo-spatial data in R via Leaflet
I have some site boundary data as follow:
UNB_BDSB_SiBdry_v08_201028lico_25831.cpq
UNB_BDSB_SiBdry_v08_201028lico_25831.dbf
UNB_BDSB_SiBdry_v08_201028lico_25831.prj
...
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0
votes
2
answers
149
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rgdal setting unreliable in parallel raster processing - terra produces auxiliary files for wrapped rasters but not for locally defined ones
Background:
When writing rasters using formats that do not support geolocation (for example .png), the Terra package saves auxiliary files containing this information. This can be prevented by ...
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0
answers
431
views
Cannot open TIFF due to missing codec in R w/ raster library
Title explains my predicament. I cannot open a tiff file using the raster package and receive an error that tells me it is due to a missing codec:
Code:
library(rgdal)
library(raster)
file_name &...
- 11
0
votes
0
answers
312
views
projectRaster() error messages
This code worked perfectly fine for me a few months ago, but now I am receiving error messages. I've tried it two different ways. Has the projectRaster() function been deprecated or syntax changed?
...
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0
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0
answers
57
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Gdalwarp for terrain correction in SAR image
I am new to the gdal utility. Using DEM data of the Moon, I am trying to perform terrain correction on SAR images.
Here is gdal commandline code ```
!gdalwarp -multi -wo NUM_THREADS=ALL_CPUS -co ...
- 81
0
votes
1
answer
196
views
Set RasterStack and SpatialPolygonsDataFrame to same coordinate system in R
I have a shapefile of 8094 Italian municipalities which I imported into R as a SpatialPolygonsDataFrame using readOGR. When I plot this, I get the following map:
I also have a RasterStack of global ...
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1
vote
1
answer
201
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How to test whether the argument passed to an R function is a raster or a vector
I am writing a function that expects two arguments: X and Y. Argument X should be a raster which can be generated by packages such as raster, terra, or stars.
Argument Y should be a polygon from ...
1
vote
0
answers
39
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Getting error while linking GDAL on MacOS 11.6 [closed]
(base) sushil@MacbookPro ~ % brew link gdal
Linking /usr/local/Cellar/gdal/3.3.2_3... Error: Permission denied @ dir_s_mkdir - /usr/local/lib/python3.9/site-packages/GDAL-3.3.2-py3.9.egg-info
(base) ...
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2
votes
1
answer
276
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Checking whether CRS is geographic coordinate system or projected coordinate system using R
I am writing a generic script that would calculate areas covered by different classes in a categorical raster in R.
I would like to provide two functions; one for use when the CRS of the raster is ...
0
votes
1
answer
544
views
Unable to sum raster files in R using raster package
I am trying to sum all of my raster files (over 500) from a single folder in R, using the raster package, but am encountering an error message I cannot figure out how to solve. I am trying to use to ...
1
vote
2
answers
333
views
Split a huge .jp2 file into GeoTIFF tiles using R
I have the 2018 orthophoto of Luxembourg (RGB IR, entire country, 25 GB) and it is way too large to work with. Furthermore, it is in .jp2 format.
I want to translate it into smaller GeoTIFF tiles, ...
- 271
0
votes
0
answers
152
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Overlapping two maps and extracting the mean value from overlapped range in R
I want to overlap a species distribution range on the world map which has values, and extract the mean value within the species range.
I have 1500+ species distribution range in a gdb file so I try ...
- 1
0
votes
1
answer
2k
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Raster subset error in R: "Error: object of type 'S4' is not subsettable"
I am running this code in R:
country_template <- raster()
dimensions <- extent(124000, 463000, 2953600, 3127600)
country_template <- setExtent(country_template, dimensions)
res(...
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1
vote
1
answer
780
views
projectraster in R cannot complete transformation
I have a few .tif rasters (ELEV and POP) projected in long/lat, but I would like the CRS and extent to be the same as a shapefile I have (STUDYAREA), for example, my study area lies mostly in UTM16 so ...
- 135
2
votes
1
answer
1k
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Creating adjacent matrix with polygons in shapefile with R
I´m very new at these geospatial data analysis and manipulation in R. Right now I have a shapefile that you can find here: http://sina.conagua.gob.mx/sina/tema.php?tema=cuencas&ver=mapa&o=0&...
-1
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1
answer
234
views
".shp" extension missing in R while other layers are present
I am trying to read a shapefile in R using the command:
rivnet <- readOGR(dsn = 'sa_riv_30s',layer = 'sa_riv_30s')
However, the '.shp' layer does not seem to be recognized by R. The layers present ...
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0
votes
1
answer
703
views
How do I get a raster layer containing cell centroid coordinates (x,y) of another raster using R?
I have a rasterStack object in R and a set of polygons that represent different landcover classes in that area. For all the cells that fall in those polygons, I have extracted pixel values for each ...
0
votes
1
answer
187
views
read_sf is truncating/rounding coordinates
I am using this function read_sf from package sf to read a shapefile in CRS 'ETRS89 / UTM zone 29N'. But coordinates are rounded to the meter after reading it.
Trying to make a reproducible example I ...
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1
vote
0
answers
180
views
Getting a rasterized object from irregular lat and long data
I have a dataframe (I've named it ozone2raster) with latitude and longitude points, and values for ozone concentration that I want to use for making a rasterized map. The dimensions of this dataframe ...
- 11
1
vote
1
answer
625
views
Error in writeOGR when trying to export spatial polygons as shapefile in R
I am trying to export polygons that i have created for home range data but when i go to export them get this error message:
Error in writeOGR(colkud95[1, ], ".", "colonyhomerange", ...
- 31
1
vote
1
answer
439
views
Converting a SpatialPointsDataFrame into km units from m, in R
I read in a UTM shapefile to R using readOGR. I want to use the resulting SpatialPointsDataFrame to build a mesh in the INLA package, but I've been told that to help with numerical stability, I should ...
0
votes
1
answer
306
views
How to merge (mosaic) images that have some similar parts in their file names in R
I have multiple GeoTIFF files each representing a single tile of MOD13A3 NDVI data. My study area is covered by 2 tiles and I have a time series spanning 60 months.
I want to mosaic(merge) every two ...
1
vote
1
answer
75
views
R: Should I transform my Raster to spatial objects here?
This question is a follow-up based on some of the advice provided in the answers and comments at Converting raster to spatial points without loss of information in R.
First, to provide a bit of ...
2
votes
1
answer
181
views
How do I change extent of shapefile into lat lon of NetCDF file?
I have loaded a shapefile and NetCDF into R, and I want to extract data based on the extent of the shapefile. I have done the following, but when I want to extract it I get NA's as the extent differs ...
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1
vote
1
answer
147
views
Create new polygon files from existing vector layer in R
I have an existing vector shapefile with all the counties in the United States (called counties.shp) I also have a dataset that contains many species-county presence data points (species.csv) which ...
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2
votes
1
answer
1k
views
Error importing TIFF file using raster in R: "Failure during raster IO"
I've been trying to import a TIFF formatted raster image into R using the raster::raster() function with no luck, and I would like to know if the file is corrupted, or if there is something I am ...
- 123
0
votes
1
answer
109
views
Eurostat shapefiles plotting with errors
I am trying to plot interactive maps at the NUTS3 level. Initially I was using shapefiles that I constructed myself for the data in QGIS, however, when I tried to use them in R they rendered poorly ...
3
votes
1
answer
253
views
error running readLAS() in lidR: 'new_proj_and_gdal' is not an exported object from 'namespace:rgdal'
I've just updated lidR to 3.1.1 and am now unable to load a .las file using readLAS():
las <- lidR::readLAS(paste(sfm_dir,"/","...
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1
vote
0
answers
25
views
Proper way to assign CRS in rgdal 1.5-23 [duplicate]
Perhaps my question has been already answered but if it did, I haven´t be able to find it. I´ve updated the rgal package to version 1.5-23 (GDAL 3.2.1 & PROJ 7.2.1) and when I run the following ...
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0
votes
2
answers
2k
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ogrListLayers cannot open data source
I recently updated R and all of it's packages, and my code for reading in the layers of a geodatabase no longer works.
It works fine on my windows desktop, but doesn't work on my macbook (I change the ...
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2
votes
1
answer
423
views
Subscript out of bounds error while mosaicking TIFFs together
I have just downloaded NDVI imagery from Google Earth Engine. The image was too big so it was divided into about 35 .tif files. Each tile has approximately 950 bands of NDVI values.
I am now trying to ...
- 415
1
vote
0
answers
90
views
Is it better to calculate area of a global raster using long/lat or using an equal area projection (e.g. Galls-Peters)?
I am trying to calculate the area of values in a global spanning raster with values of NA, 1, 2 or 3. I would like to know the total area of each category, however, the map is currently in lat long (...
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1
vote
1
answer
1k
views
Unable to library "rgdal" and "gdalUtils" after upgrading to macOS big sur
I just upgraded my laptop to macOS big sur, but then I could not library "rgdal" and "gdalUtils". It threw me an error:
Error: package or namespace load failed for ‘rgdal’ in dyn....
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1
vote
1
answer
3k
views
Unable to find inherited method for function ‘crop’ for signature ‘"numeric" using R
I'm trying to iterate a crop and then a resampling process by using a for loop but I've faced some problems because I'd obtain an error message. Below is my code, then the error message
#find all tifs ...
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1
vote
1
answer
549
views
Reading or creating empty shapefile in R
I have several polygon shapefiles that I need to merge into one using a loop in R.
I want to start with an empty shapefile and merge it with the existing shapefiles. All shapefiles will be chacked ...
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2
votes
2
answers
1k
views
How to convert MTM coordinates to WGS84 with R?
I have MTM coordinates in the following format
df <- data.frame(xcentro = c(250605,250770,250871),ycentro = c(5186087,5185610,5186140))
and need them to be converted in the WGS84 format.
I expect ...
- 123
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0
answers
76
views
Are these sp files equal in terms of proj4string? Can I do some transformation of the proj4string?
summary(SCat_sp_E6)
Object of class SpatialPolygonsDataFrame
Coordinates:
min max
x -74.095072 -74.018988
y 4.647323 4.832934
Is projected: FALSE
proj4string :
[+proj=longlat +...
- 1
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votes
4
answers
1k
views
sp::proj4string equivalent in the PROJ6 framework?
I am confused about the shift from PROJ4 to PROJ6 in the (relatively) recent versions of the spatial packages of R (and gdal for that matter). I used to use sp::proj4string() to get the projection ...
- 375
1
vote
1
answer
463
views
Reprojecting GOES-16 data in R
I'm trying to plot GOES-16 data with world boundaries. Data comes from GOES-16 files such as this.
Data comes with "GOES-R ABI fixed grid projection" reference system, which to my better ...
2
votes
1
answer
157
views
Can not load spatial data from MSSQL on Linux
I have a table on the MS SQL server. I am trying to import the data in R using the rgdal package. I can import the table on Windows without any problems using the following code:
readOGR(dsn = "...
- 131
3
votes
0
answers
241
views
Installing rgdal - cannot solve dependencies
I am trying to build a docker image based on osgeo/gdal:ubuntu-XXXXX. However it keeps failing when trying to install rgdal. I've tried this on gdal-3.1.1/proj-7.1.0 and gdal-3.0.3/proj-6.3.0, as well ...
- 131
1
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0
answers
760
views
Using rdgal on R- error- No GDAL installation found
I trying to map burnt area using hdf data. For this i have all the neccessary packages, including the rdgal pacakge.
However when i type in my burnt area code, i get the response
I have downloaded ...
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1
vote
1
answer
523
views
Error "projects.h file not found" while installing rgdal in R on Mac
I cannot install rgdal on MacBook with Catalina. I installed r using Brew and r is up to date.
I have the gdal framework installed. I've tried to install rgdal from
source, but I keep getting an ...
- 145
3
votes
1
answer
438
views
r - Setting custom projection in PROJ >=5 paradigm
Before PROJ >=5.0, one could set a custom projection centered anywhere in the world by adjusting the +lon_0=and +lat_0= arguments in proj4string specification.
For example, a projection centered on ...
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