venus {sphunif} | R Documentation |
Venus craters
Description
Craters on Venus from the USGS Astrogeology Science Center.
Usage
venus
Format
A data frame with 967 rows and 4 variables:
- name
name of the crater (if named).
- diameter
diameter of the crater (in km).
- theta
longitude angle
of the crater center.
- phi
latitude angle
of the crater center.
Details
The angles are such their associated planetocentric
coordinates are:
with denoting the north pole.
The script performing the data preprocessing is available at
venus.R
.
Source
https://astrogeology.usgs.gov/search/map/Venus/venuscraters
Examples
# Load data
data("venus")
# Add Cartesian coordinates
venus$X <- cbind(cos(venus$theta) * cos(venus$phi),
sin(venus$theta) * cos(venus$phi),
sin(venus$phi))
# Tests
unif_test(data = venus$X, type = c("PCvM", "PAD", "PRt"), p_value = "asymp")
[Package sphunif version 1.4.0 Index]