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Questions tagged [r-sp]

An R package for spatial data. Questions on spatial data might be better asked on https://gis.stackexchange.com

691 questions
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spTransform() in R warnings with PROJ

I'm in R v 4.0.4 - sp v 1.4-5, and rgdal 1.5-23. I'm loading a shapefile using the rgdal package and then trying to simply apply spTransform() but I'm getting a ridiculous set of warnings that I can't get rid of. Anyone have any insight on…
GrantRWHumphries
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How to create a hexbin polygon over a world map with a geom_sf object in R?

I have global data with over 180,000 data points. For every pair of coordinates I have a value, and many times I have multiple values at the same coordinates (see example of the dataframe df). I want to plot this data using hexagonal grids onto a…
Leo Ohyama
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Since update of sp package i get a warning by calling a sp::CRS definition

Since update of sp package i get a warning i did not get before: 1: In showSRID(uprojargs, format = "PROJ", multiline = "NO") : Discarded ellps unknown in CRS definition: +proj=stere +lat_0=90 +lon_0=10 +k=0.93301270189 +x_0=0 +y_0=0 +R=6370040…
Andreas
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How to preserve scale_fill_color from first plot using shapefiles in ggplot2

I need help with scale_fill_manual using a shapefile in ggplot2. I have tried many thing and I am finally posting so hopefully someone will be able to give me a hint. I am basically ploting a shapefile and use scale_fill_manual to vizualise it with…
Salvador
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Converting data.frame to SpatialPolygonsDataFrame

Here is the data for reproducible purposes: structure(list(countyfp10 = c(1, 1, 1, 1, 3, 3, 3, 3, 5, 5, 5, 5, 7, 7, 7, 7), id = c(7417, 7418, 7419, 7420, 7421, 7422, 7423, 7424, 7425, 7426, 7427, 7428, 7429, 7430, 7431, 7432), lat =…
user9302275
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1 answer

Fastest way to determine COUNTRY from millions of GPS coordinates [R]

I have millions of GPS coordinates and want to quickly add a column of the country of the coordinates. My current method works but is extremely slow: library(data.table) #REPRODUCE DATA data <- data.table(latitude=sample(seq(47,52,by=0.001),…
Neal Barsch
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line connecting label text and point in tmap plot

i'm doing a tmap plot with a shape file, and i want to be plotting several points for which i have long-lat coordinates onto the shape file. i've got the plot working just fine, however there are too many points on the map, meaning that the label…
nikUoM
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How to compute the greatest distance between a centroid and the edge of the polygon using the SF package?

I have a bunch of variously shaped and sized polygons with centroids. I want to calculate distance from each centroid to the furthest point of its respective polygon. This question has been resolved here using the package::sp and…
John J.
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How to get the coordinates of an intesected line with an outline - R

I have a shape that I upload form the internet. Based on its calculated centroid I would like to plot from it a 50-degree line and find the coordinates that he intersect with the outline. Any idea how can I do…
elyraz
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Memory (RAM) issues using intersect from raster package

I have trouble getting the intersection between two large SpatialPolygonsDataFrame on R. My polygons data represent buildings and administrative boundaries, and I am trying to get the intersection polygons between them. I understand that the…
A.Rogeau
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R - SpatialPolygonsDataFrame from a list of SpatialPolygons

I´m looking for a way to create a SpatialPolygonsDataFrame from a list of SpatialPolygons? In the following there´s an example of a list of Polygons from which a SpatialPolygonsDataFrame, containing all Polygons of the list, should be created.…
N'ya
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Extract data without geometries from `sf` objects like in `sp@data`

Probably a very basic question but I found nothing in the documentation of Simple Features R package. I'm looking for the native sf function to extract on the fly all the columns of an sf object without the geometries. Just like SP@data with sp…
Gilles San Martin
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Simplifying polygons in rgeos and maintaining data in SpatialPolygonsDataFrame

Background I'm interested in simplifying polygons with use of the gSimplify function available through the rgeos package. Reproducible example A reproducible example can be generated with use of the code below: # Data sourcing…
Konrad
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How to assign the data of a centroid (marker) to the voronoi/thiessen polygon it belongs to? (R)

In his article Kyle Walker showed a method to make Voronoi Polygons in Leaflet. He drew Voronoi polygons around each starbucks coffeehouse in Fort Worth by means of the following code: library(leaflet); library(rgeos) library(rgdal); …
Zigaar
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Create hexagonal grid over city and associate with lon / lat points (in R)

I've been researching this for a while now but haven't come across any solution that fit my needs or that I can transform sufficiently to work in my case: I have a large car sharing data set for multiple cities in which I have the charging demand…
Jonathan
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