Man pages for crstools
Tools to Work with Projections

choose_gcpFunction to choose the Ground Control Point (GCP) on an image
crstools-packagecrstools: Tools to Work with Projections
extract_coordsExtract coordinates
find_gcp_coordsFind the coordinates (longitude and latitude) of the ground...
geom_tissotAdd Tissot's indicatrix to a map
georeference_imgGeoreference an Image using Ground Control Points (GCPs)
suggest_crsSuggestions for map projections depending on the extent
crstools documentation built on March 19, 2026, 5:08 p.m.