search for: spatialpolygonsdatafram

Dear list, I'd like to use the function smooth.map{maps} to smooth out aggregated spatial data. The first argument to this function must be a map object. I have a shape file which I read with readShapeSpatial{maptools} and I got an object of class "SpatialPolygonsDataFrame". Is it possible to create a map object from a SpatialPolygonsDataFrame object? Alternatively, is there any other function similar to smooth.map that will work with a SpatialPolygonsDataFrame? Thanks for any help, Axel. [[alternative HTML version deleted]]

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...= "Tamil Nadu",]) #Error arises for this State: gCentroid(india[india$NAME == "Gujarat",]) #Error says: #Error in createPolygonsComment(p) : #rgeos_PolyCreateComment: orphaned hole, cannot find containing polygon for hole at index 2 #Code ends I don't know my way around SpatialPolygonsDataFrame objects very well, and have no idea how to fix the errant hole. Any help greatly appreciated. Thanks Dan Bebber

I have a SpatialPolygonsDataFrame object (sp package). It contains 40 polygons. Now I want to join some of the polygones. I cannot figure out how to do that? Any ideas? The code below produces a map of Germany and I need to join some counties. library(sp) library(RColorBrewer) # get spatial data for Germany on county level co...

Dear listers, I am working since a while with the sp package and still wonder how the plot methods are managed with sp spatial objects. For instance, SpatialPolygonsDataFrame objects have obviously a plot method. However it cannot be found in the list provided by methods(plot) . Furthermore ?plot.SpatialPolygonsDataFrame, nor ?plot.SpatialPolygons, etc.. provide a help, though the lattice function spplot is adequately documented. On the other hand, plot(myobject, b...

...pl)[,1], lat = coordinates(wrld_simpl)[,2]) %>% filter(lat < -20, lon > 60) %>% dplyr::select(NAME) I got the following error messages: Error in (function (cl, name, valueClass) : c("assignment of an object of class ?tbl_df? is not valid for @?data? in an object of class ?SpatialPolygonsDataFrame?; is(value, \"data.frame\") is not TRUE", "assignment of an object of class ?tbl? is not valid for @?data? in an object of class ?SpatialPolygonsDataFrame?; is(value, \"data.frame\") is not TRUE", "assignment of an object of class ?data.frame? is not valid f...

I'm hoping that someone could guide me in how to extract data from shapefiles. I want to extract data from a shapefile (classed as "SpatialPolygonsDataFrame") and more specifically, the data is contained within the slot called "coords" from the class "polygons" within this file and despite my best efforts (and much reading!), I'm at a lost. Many thanks, Kate

Hi, I am working with a SpatialPolygonsDataFrame of many islands. There are a lot of polygons (islands) composing my SpatialPolygonsDataFrame. I want to extract the elevation of each island. I need to separate the different polygons (like dissolve function in arcgis), to have the elevation of each island. Do you have any idea how can I do that ?...

In converting some older code: ## builds an OWIN to generate a set of points on a grid within the OWIN object: bdry <- read.shape( "../../data/boundary.shp" ) outline.verts <- bdry$Shapes[[2]]$verts[1:bdry$Shapes[[2]]$Pstart[2],] outline.order <- nrow( outline.verts ) : 2 bdry.poly <- vector( 2, mode="list" ) bdry.poly[[1]] <- list(

Greetings: I would like to kindly ask for a little help. The rough code is: #________________________________________________________ dat=data.frame(read.delim(file="all.txt", header = TRUE, sep = "\t", quote="\"", dec=".",na.strings = "NA")) nc=read.shape("astae.shp", dbf.data=TRUE, verbose=TRUE) mappolys=Map2poly(nc) submap

Hi, I want to use map("state") and have the ecoregion shape (please see link) file projected onto this. ftp://ftp.epa.gov/wed/ecoregions/cec_na/NA_CEC_Eco_Level3.zip ftp://ftp.epa.gov/wed/ecoregions/cec_na/NA_CEC_Eco_Level3.zip Could someone please show me how; I have never messed with this sort of thing. Thanks. -- View this message in context:

...ltraj. - The functions making the interface with the package "sp" have been updated: 'area2spol' converts an object of class 'area' into an object of class 'SpatialPolygons'. 'spol2area' converts an object of class 'SpatialPolygons' or 'SpatialPolygonsDataFrame' into an object of class 'area'. 'attpol2area' gets the data attribute of an object of class 'SpatialPolygonsDataFrame' and stores is into a data frame. 'traj2spdf' converts an object of class 'traj' into an object of class 'SpatialPoints...

...ltraj. - The functions making the interface with the package "sp" have been updated: 'area2spol' converts an object of class 'area' into an object of class 'SpatialPolygons'. 'spol2area' converts an object of class 'SpatialPolygons' or 'SpatialPolygonsDataFrame' into an object of class 'area'. 'attpol2area' gets the data attribute of an object of class 'SpatialPolygonsDataFrame' and stores is into a data frame. 'traj2spdf' converts an object of class 'traj' into an object of class 'SpatialPoints...

Hi, I'd like to read a shapefile into a Map object. This is exactly what read.shape{maptools} is suppoed to do, according to the documentation I found in the link below. However, this doesn't seem to work library(maptools)x <- read.shape(system.file("shapes/sids.shp", package="maptools")[1])Error: could not find function "read.shape" I haven't

Dear all, I am trying to create a map for central asian countries(Kazakhstan, Uzbekstan, Kyrgyzstan, Turkmenstan, and Tajikstan). I tried google for shapefiles and Rdata files of central asia, but I can't seem to find them. There is only a world map and individual maps for each countries. If I use individual maps to create this map, how do I put them on a same graphic with different colours?

...RI Shapefile', verbose=TRUE) Error in writeOGR(shape, ".", layer = "temp", driver = "ESRI Shapefile") : Creation of output file failed > writeOGR(shape, '/tmp', layer='temp', driver='ESRI Shapefile',verbose=TRUE) $object_type [1] "SpatialPolygonsDataFrame" $output_dsn [1] "/tmp" $output_layer [1] "temp" $output_diver [1] "ESRI Shapefile" $output_n [1] 169 $output_nfields [1] 23 $output_fields [1] "ID" "ANID" "F_AREA" "Avg_z" "Manning"...

Dear all, I had to place points at random, one in each of larger number of polygons (actually in objects of class 'SpatialPolygonsDataFrame' , see sp library), and tried first to do it using spsample (from sp). Surprisingly, every 5-15 trials, the output was a NULL value. The doc says that ' this may occur when trying to hit a small and awkwardly shaped polygon in a large bounding box with a small number of points',...

...IS for manipulations. At this point the ID names were lost. I brought the manipulated shapefiles back into qGIS, but can't figure out how to rename the individuals. #Calculate MCP and save as a shapefile my.mcp<-mcp(xy, id=id, percent=100) spol<-area2spol(my.mcp) spdf <- SpatialPolygonsDataFrame(spol, data=data.frame +(getSpPPolygonsLabptSlots(spol), +row.names=getSpPPolygonsIDSlots(spol)), match.ID = TRUE) writeOGR(spdf,dsn=mcp.dir,layer="All Mantas MCP", driver="ESRI +Shapefile") #Read shapefile manipulated in qGIS mymcp<-readOGR(d...

...ions kernelUD, kernelbb, BRB and kernelkc all return objects of class "estUDm", which are lists of objects of class "estUD". The class estUD extends the class SpatialPixelsDataFrame. - the function clusthr and LoCoH return objects of class "MCHu", which are lists of SpatialPolygonsDataFrame - the function mcp returns a SpatialPolygonsDataFrame * home range estimation methods now take objects of class SpatialPoints as arguments * objects of class "ltraj" are now characterized by an additional attribute "infolocs", which is designed to store metadata on the tra...

...ions kernelUD, kernelbb, BRB and kernelkc all return objects of class "estUDm", which are lists of objects of class "estUD". The class estUD extends the class SpatialPixelsDataFrame. - the function clusthr and LoCoH return objects of class "MCHu", which are lists of SpatialPolygonsDataFrame - the function mcp returns a SpatialPolygonsDataFrame * home range estimation methods now take objects of class SpatialPoints as arguments * objects of class "ltraj" are now characterized by an additional attribute "infolocs", which is designed to store metadata on the tra...