Questions tagged [shapefile]
The Esri shapefile or simply a shapefile is a popular geospatial vector data format for geographic information systems (GIS) software. Questions about shapefiles are best asked on the GIS Stack Exchange.
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Creating random polygons within a set shapefiles boundary in R
I have a shapefile which is the national boundary line of Chile. If possible, I would like to randomly generate e.g. 1000 polygons within this area. I'm wondering what the best way would be to go ...
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Add new column attribute to the shapefile and save it to database using Geotools Java
I am transforming a shapefile by adding a new column attributes. Since this task is performed using Java, the only option I know for now is using Geotools. I have 2 main concerns:
1. I am not able to ...
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Intersection keeping non-intersecting polygons in sf - R
I'm looking to intersect 2 spatial layers, keeping all the non-intersecting features as well.
My first layer is the SA2 from NSW, Australia, which look like
enter image description here
My second ...
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How to place a shapefile on top of raster file in one plot, and then save the plot in a Jpeg file format
I am posting this question after three days searching the net but no success. Hope can get the answer here. Please do NOT delete the post as I did not find an answer for it here also. Thanks.
I have ...
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Plot shapefile city borders on top of cartopy map
I'm trying to plot the outline of Bay Area city/town borders on top of a cartopy terrain map using a shapefile obtained here and following this example. For some reason, the borders don't show up, ...
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how to import spatial data to mysql 8 (Mysql WorkBench 8.0)
I have been trying to load spatial data to mysql 8 db and seems like it is not working. the import data section basically does not move from 0% but the tables are created with null values on every ...
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How to filter a shape file before plotting it in R
Just to try to filter a shape file to ease plotting
I have a shape file downloaded from UK gov:
http://geoportal.statistics.gov.uk/datasets/7ff28788e1e640de8150fb8f35703f6e_1/data?geometry=-76.678%...
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How to change an attribute in Shapefile with a certain value with QGIS / Python
I want to use the Python Console in QGIS to change all attributes in a Shapefile with a certain value.
I have a field named "ANB" and I want to change the value "2" in for example "3".
I know how to ...
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Write Pandas Dataframe to DBF File?
I'm working with shapefiles, which have the attribute data stored in a DBF file. I need to manipulate the attributes using Pandas, and write the new DBF data back to disk.
Unfortunately Pandas ...
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Listing Attribute values of Shape file ogrinfo/ogr2ogr
How do I list the values of an attribute in a shape file.
ogrinfo -so -al build/SLA11aAust.shp shows the attributes. Which command to list values of STATE_CODE: :
Layer name: SLA11aAust
...
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Testing point with in/out of a vector shapefile
Here is my question.
1. Intro
a shapefile in polygon type represent the study area
http://i8.tietuku.com/08fdccbb7e11c0a9.png
some point located in the whole rectangle map
http://i8.tietuku.com/...
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Opening SHP file in RStudio
I've a package of five files with all French administrative limits (available here).
All these five files LIMITE_DEPARTEMENT.SHP/DBF/AVL/PRJ/SHX are in a the folder /home/jonathan/R.
I use this code :...
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How can I plot shapefile loaded through fastshp in ggplot2?
I stumbled upon fastshp library and according to description (and my quick cursory tests) it really does offer improvements in time of reading large shapefiles compared to three other methods.
I'm ...
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Getting "No SCHEMA dataset name was specified" while running FME script
While running the FME script I am encountering the following error message :
No SCHEMA dataset name was specified (couldn't find a value for SCHEMA_2_DATASET' or SCHEMA_DATASET')
I have upgraded to ...
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Generating random locations along the outer border of a .shp polygon using R
I am able to generate random points within the polygons using the package sp, however I am interested in generating points along the outline of the polygon.
For example, if I have a shapefile of a ...
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Read a shapefile with character encoding
Is there a way to read a shape file with a specific character encoding? I'm trying to read in a Canadian shapefile that has special (French) characters in some of the names. I can convert them ...
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Shade states of a country according to dictionary values with Basemap
I want to plot the map of Mexico and shade the states accordingly to a the values of a dictionary. I used the following code suggested in previous question (Easiest way to plot data on country map ...
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How to draw a line on a shapefile using Geotools
I have a shapefile that is opened and looks as such:
Now I am attempting to draw a line from two points I click on that map; however the code they give for the QuickStart.java example is ...
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Weird memory problems with ggplot maps
I'm trying to make some maps of the British Isles and have come across a very strange memory problem. My workflow is taking advantage of ggplot's layers to add new detail onto a base map.
The base ...
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Importing non-English shapefiles
I'm trying to import a shape-file like this:
fn <- "Proj1"
my_shp <- readShapeSpatial(fn)
On a windows-computer (32-bit) it works ok, but when I do the same from a Ubuntu-machine (64-bit, ...
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specifying specific breaks in legend using ggplot2
library(raster)
library(dplyr)
library(ggplot2)
get.shapefile.df <- function(shp.in, df.in,
region.var){
require(sf)
require(sp)
require(plyr)
require(ggplot2)
shp.in@data$id <- rownames(...
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Dissolving hexmap polygon shape files
I am trying to produce an outline for a hexagonal cartogram by dissolving the inner polygons via the unionSpatialPolygons or aggregate functions. I am getting stray hexs that do not dissolve... a ...
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Merging spanish shapefile with dataframe
I am having problems merging a Spanish provinces' shapefile with a particular dataframe. After merging them, somehow the shapes get linked to the false provinces (f.e. Barcelona returns the shape of ...
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flatten/dissolve/merge entire shapefile
I've been using ogr2ogr to do most of what I need with shapefiles (including dissolving them). However, I find that for big ones, it takes a REALLY long time.
Here's an example of what I'm doing:
...
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shapefile to neural network in R
I need to convert a shapefile (ESRI) of roads type SpatialLinesDataFrame in a neural network in R.
I do not know how to remove nodes or vertices of the shape. Determine the length of each edge ...
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Displaying vector files in QT using GDAL/OGR
I am writing an application to load vector maps/shape files using gdal/ogr and display them onto a gui designed using Qt. I am new to dealing with vector files, I am not able to decide how to render ...
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readOGR(), "cannot open file" error
Let me begin by saying that I have exhaustively looked at the other threads that have dealt with readOGR errors, and have made several attempts to implement them for my own benefit.
The issue I have ...
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Shapefile to 2D grid as sparse matrix
I'm getting well and truly lost in all the bolt-on libraries for doing geospatial calculations with NumPy.
What is the most straightforward way to take a shapefile (whose extent is the entire Earth), ...
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Shapefiles under 1000 features but ArcGIS Online not accepting it?
I have a couple of zipped shapefiles with around 100-150 features. I am trying to add them on ArcGIS Online (which accepts under 1000 features per shapefile) but it is unable to do so, indicating to ...
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Extract polygons from shapefile using Geotools
I have a shape file (Sample.shp) along with two other files (Sample.shx and Sample.dbf), which has geometry (polygons) defined for 15 pincodes of Bombay.
I am able to view the .shp file using the ...
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Error when opening shapefile
I am trying to open a shapefile in R, but I am getting the following error message:
Error in getinfo.shape(filen) : Error opening SHP file
I have checked other responses and most problems seem to ...
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Is there a performance rationale for mixing a binary file's endianness?
I'm writing a parser for the most common geographic data storage type, a collection of files called a "shapefile". This is my first project where I've had to think about endianness.
It turns out ...
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Error in st_normalize.sfc(x, c(x_range[1], y_range[1], x_range[2], y_range[2])) : domain must have a positive range
Background:
I am using ggplot2 geom_point to map animal location points by week. As a basemap, I am using a shapefile from my computer.
Here is an example of my data:
datexample <- data.frame(
...
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concave polygon into convex polygons using r
I am trying to split a concave polygon into convex polygons using r.
I am trying to figure out how to successfully accomplish this for one polygon with the hopes of implementing this on a large ...
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Use custom map in Apache Superset Dashboard
Superset dashboards currently supports standard country maps (geojson) with ISO Codes.
What would be the best way to import a custom map (like a forest map or an ocean map for example...) in order ...
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NetLogo GIS: dealing with large shapefile
I'm developing a NetLogo model using the GIS extension to import a road network shapefile. The model works fine when I work on a small area of about 5x5 km. However I would like to allow potential ...
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Calling Large Shapefiles into R, 2 GB polygon layer, rgdal
I'm attempting to open a shapefile in R using rgdal. my code is simply:
shp <- readOGR("D:/Documents/EPA/Groundwater_Wells/R Work", "us_blocks_2010")
The error message I receive is:
Error: C ...
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Outline polygon border that has been removed due to NA's
I want to plot a shape file using ggplot2 in R. More specifically, I want to plot % white living in each block for several major cities. So far, I've worked with New Haven. The problem is that some ...
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Global Raster of geographic distances
Im wondering if someone has built a raster of the continents of the world where each cell equals the distance of that cell cell to the nearest shore. This map would highlight the land areas that are ...
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Displaying a Shapefile
I have a shapefile that I want to display. I tried using matplotlib to display it, but I get this:
However, when I tried to display using an online website I get this;
How can I get the second image?...
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write a 2d shape file with NetTopologySuite
I created a routine that writes correctly shape files, but I have a problem: the shape is a 3d, but I need to write a 2d shape file.
How can I do this?
thanks
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plot one polygon from a spatial polygon data frame
I'm a bit new to R and so this mights seem an easy command for you. I have a shapefile loaded in R with several polygons in it, and I just would like to plot the first polygon. I tried several ...
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gSimplify not simplifying shapefile in R
I'm unable to simplify a shapefile in R
Shapefile from here: https://geoportal.statistics.gov.uk/Docs/Boundaries/Local_authority_district_(GB)_2014_Boundaries_(Generalised_Clipped).zip
library(tmap)
...
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Implementing a brute force algorithm for detecting a self-intersecting polygon
I initially implemented the Hoey-Shamos algorithm, however it is too complex for future maintainability (I have no say in this), and it wasn't reporting correctly, so an optimized brute force ...
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How does a SHX-file work?
If you have geographic data stored in ESRI shapes, you have at least three files: one ending with .shp containing the vector-data, one ending with .dbf containing attributes and a file ending with ....
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R: Calculating the Distance Between Two Geographical Points
I am interested in learning how to work with Road Network Files in R.
For example, I would be interested in finding out the driving distance between the following two (Canadian) addresses:
CN Tower: ...
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Combining shapefiles in Python / GeoPandas
I have three polygon shapefiles which overlap each other. Let's call them:
file_one.shp (polygon Name is 1)
file_two.shp (polygon Name is 2)
file_three.shp (polygon Name is 3)
I want to combine them ...
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Add a relief (GEOtiff, .tif) to a ggplot of the swiss country borders ((polygon) shapefile, .shp)
I plotted the area of Switzerland (polygon shapefile) and added points (swiss weather stations) via coordinates.
# Boundaries with data-points plotted
library(rgdal)
library(readxl)
library(sp)
...
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PostgreSQL/PostGIS: shp2pgsql INSERT instead of Creating a new table
Hi I am very new to PostgreSQL/PostGIS and just learned how to convert Shapefiles into SQL file and import it to PostGIS using the shp2pgsql by following this tutorial. What I noticed is that whenever ...
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Shapefile to Topojson conversion
I am trying to convert the Ghana admin1 shapefile that can be found here. My end goal is to obtain a TopoJSON as described in this question.
I have used this command on a Linux machine:
ogr2ogr -f ...
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