How to convert a CSV to a shapefile in R?

How to convert a CSV to a shapefile in R?

We will also reproject data imported in a shapefile format, export a shapefile from an R spatial object, and plot raster and vector data as layers in the same plot. Convert a .csv to a spatial object. Project coordinate locations provided in a Geographic Coordinate System (Latitude, Longitude) to a projected coordinate system (UTM).

How to add x and y coordinate data?

Select the table that contains x,y coordinate data. Identify the columns that hold the x- and y-coordinates (and, optionally, the z-coordinate). Specify the coordinate system. You can also add x,y data in tables as a new feature class using geoprocessing.

How to convert CSV to a spatial object?

Convert a .csv to a spatial object. Project coordinate locations provided in a Geographic Coordinate System (Latitude, Longitude) to a projected coordinate system (UTM). Plot raster and vector data in the same plot to create a map.

How to create a x y point layer in CSV?

From the CALC application (not from WRITER or the default LibreOffice Suite!) click on the menu item File > Open and browse to your UNZIPPED and RENAMED file jm.csv then click OPEN 1. Set Character Set for your import file to Unicode UTF-8, USGS Country Files are UTF-8 2.

How to create a SF object in R?

… column elements to be binded into an sf object or a single list or data.frame with such columns; at least one of these columns shall be a geometry list-column of class sfc or be a list-column that can be converted into an sfc by st_as_sfc. character vector; see details below.

How to convert data frame to spatial coordinates?

I used the following code: First, you take the columns of lon and lat and create an object for coord. Then, you subtract them from the original data frame and create a new object. You finally use SpatialPointsDataFrame () to create a SpatialPointsDataFrame.

How to make a vector map in R?

Project coordinate locations provided in a Geographic Coordinate System (Latitude, Longitude) to a projected coordinate system (UTM). Plot raster and vector data in the same plot to create a map. You will need the most current version of R and, preferably, RStudio loaded on your computer to complete this tutorial.

How to convert data frame of coordinates to SF object?

In order to convert a data frame of coordinates into an sf object you can make use of the st_as_sf () function you used in the previous exercise.

How do you add a field to a shapefile?

Joining works by adding fields from your data table to the shapefile’s attribute table based on matching values found in the key columns. In this example, the key in our data table will be geoid . As you will soon see, there is a corresponding field in our shapefile.

How to convert a table to a CSV file?

Converts a table to a CSV file. The input file can be a geodatabase table, feature class, shape file, .dbf file, or table view. The output CSV file has the option to be pipe or comma delimited. A geodatabase table, feature class, shapefile, .dbf file, or table view to convert.

What do you need to reproject data in R?

When you reproject the data, you specify the CRS that you wish to transform your data to. This CRS contains the datum, units and other information that R needs to reproject your data. the CRS that you wish to transform that object too.

How to export a shapefile in rgdal?

Export a Shapefile. We can write an R spatial object to a shapefile using the writeOGR function in rgdal. To do this we need the following arguments: the name of the spatial object (plot.locationsSp_HARV) the directory where we want to save our shapefile (to use current = getwd() or you can specify a different path)

What does the spatial extent of a shapefile represent?

The spatial extent of a shapefile or R spatial object represents the geographic edge or location that is the furthest north, south, east and west. Thus is represents the overall geographic coverage of the spatial object. Source: National Ecological Observatory Network (NEON)

How to add a CRS to a shapefile?

Optional: the other columns stored in the data frame that you wish to append as attributes to your spatial object. We can add the CRS in two ways; borrow the CRS from another raster that already has it assigned (Option 1) or to add it directly using the proj4string (Option 2).

How to set the right CRS on SF object?

For example, You can use st_crs. Note: the points should be registered in the same coordinate system, of course. If not, you would have to find out the correct coordinate system for them and then use st_transform to put them into the same coordinate system as the polygons.

How to convert list to data frame in R-statology?

1 Method 1: Base R. In this example, sapply converts the list to a matrix, then data.frame converts the matrix to a data frame. 2 Method 2: Data Table. This results in a data table with two rows and three columns. 3 Method 3: Dplyr. This results in a data frame with two rows and three columns.