[R-sig-Geo] Merging Shape files

[Dexter Locke]

Within st_join() see the options like "left = TRUE".

You may also want to look at st_intersects()

Here are other helpful reference websites:
https://r-spatial.github.io/sf/reference/geos_binary_pred.html

https://cran.r-project.org/web/packages/sf/vignettes/sf3.html

-Dexter


On Tue, Mar 17, 2020 at 10:29 AM El Mechry El Koudouss <
eelkoudouss using fordham.edu> wrote:

> Dear readers,
> I downloaded a shapefile with data on crime incidents in Washington DC in
> 2016 (available here:
> https://opendata.dc.gov/datasets/crime-incidents-in-2016) and another
> shapefile with data on parks and recreation areas, also in Washington DC
> (available here:
> https://opendata.dc.gov/datasets/parks-and-recreation-areas).
> I was able to read both shapefiles using st_read() from the sf package. My
> question is, how can I merge the two data sets? I tried st_join() but it
> simply resulted in empty columns from the parks dataset getting added to
> the crime data. Any guidance would be much appreciated.
> library(sf)
> parks <- st_read("Parks_and_Recreation_Areas.shp")
> crime <- st_read("Crime_Incidents_in_2016.shp")
> df <- st_join(crime, parks)
>
> --
> El Mechry, El Koudouss (Meshry)
> Graduate Research Assistant
> Center for International Policy Studies
> Fordham University
> Department of Economics
> Website: www.meshry.com
>
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>
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