Quickstart

Suppose you have a PROJ string that marks a projection (let this be proj=eqc in this example – not good, but illustrative) and suppose that you have a set of longitude and latitude coordinates that you want to plot. For the sake of this quick introduction, create some random data:

import numpy as np
rng = np.random.default_rng(1234)
lon = 45.0 + 20.0 * rng.random(10)
lat = 10.0 + 0.2 * (lon - 45.0) + 5 * rng.random(10)

A very simple scatter plot of these data using flottekarte could be

from pyproj import Proj
import matplotlib.pyplot as plt
from flottekarte import Map

fig = plt.figure()
ax = fig.add_subplot(111)
proj = Proj("proj=eqc")
mp = Map.for_data(lon, lat, "proj=eqc", ax)
ax.scatter(*proj(lon, lat))
mp.plot_axes(5.0)
mp.plot_grid(5.0)

which results in a map like this: