Aggregate points to a fishnet in R (sf)
Рет қаралды 899
Күн бұрынIn this video we create a fishnet grid over a set of points. We then use that grid to aggregate and map our points.
crimemapping R package / lessons: github.com/mpjashby/crimemapp...
R code: gist.github.com/JosiahParry/d...
0:00 - intro
0:48 - making an sf object
2:44 - a first grid
4:40 - making the fishnet
8:55 - aggregating to the fishnet
10:55 - mapping
12:00 - making a function
@josealejandromoralesgomez3019 9 ай бұрын
Thanks a lot for this video! I just wondering how may I export this to a .geojson file for down stream analysis such as Emerging Hot Spot Analysis? Thank you.
@josiahparry 9 ай бұрын
You can use the function st_write() from the sf package. If you have an sf object you can write it like so sf::st_write(x, "my-file.geojson") or sf::st_write(x, "my-file.shp") for example
@user-ef4fu8os9v 11 ай бұрын
Great video! I got a question... is it possible to get the % covered by each grid by a set of polygons inside of it with sfdep?
@veronicaherrera2420 Жыл бұрын
Question: If we want to run this through a Hot Spot Analysis later, how can we maintain the geometry to follow along with your "Hot Spot Analysis in R: GIS Fundamentals" video? Since we turned it to an sf object I am unable to proceed with assigning neighbors and weight. Specifically the mutate() and st_continguity() functions. -Thank You
@josiahparry Жыл бұрын
st_contiguity() works with the geometry column in an sf object. You should use the resultant aggregated object as you hotspot features. Maybe you can make an issue at github.com/JosiahParry/youtube-tutorials/ with a reproducible example? Thanks : )
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