README.md

ArcMap-to-R

The purpose of this repository is help me remember how to perform various geoprocessing operations across Esri's ArcMap and R's sf and raster packages. Sometimes the tools use the same name, sometimes they don't.

Vector (feature class) Operations

Operation	ArcMap	sf
Project New Coordinate System	Define Projection	st_transform, st_crs
Buffer	Buffer	st_buffer
Find Centroid	Field Calculator	st_centroid
Simplify Geometry	Simplify Polygon, Simplify Line	st_simplify
Triangulate Points	Create TIN	st_triangulate
Create Voronoi Polygons	Create Theissen Polygons	st_voronoi
Create Convex Hull	Minimum Bounding Geometry	st_convex_hull
Find Intersection	Intersect	st_intersect
Find Overlap	Identity	st_difference
Crop/Clip	Clip	st_crop, st_intersection
Spatial Join	Spatial Join	st_union, st_join
Calculate Proximity	Near	st_nearest_feature, st_nearest_point
Symmetrical Difference	Symmetrical Difference	st_sym_difference

Raster Operations

Operation	ArcMap	raster
Manipulate Raster Values	Raster Math	values(r) <- {function}, calc, overlay
Vector to Raster	Polygon to Raster	rasterize
Extract Values by Point	Extract Multi Values to Points	extract
Project CRS	Project	crs, projectRaster
Change grid cell size	Environment Settings > Raster Analysis	aggregate
Reclassify Values	Reclassify	reclassify
Hillshade	Hillshade	hillShade
Create contours	Contour	contour
Zonal statistics	Zonal Statistics, Zonal Statistics as Table	zonal
Aspect/Direction	Aspect	direction