#!/usr/bin/python3 import argparse import geopandas import psycopg2 import matplotlib.pyplot as plt from matplotlib import rc # CMAP = 'Set3' # is nice too CMAP = 'tab20c' BOUNDS = ('xmin', 'ymin', 'xmax', 'ymax') PSQL_CREDS = "host=127.0.0.1 dbname=osm user=osm password=osm" COLORS = { 'black': '#000000', 'green': '#1b9e77', 'orange': '#d95f02', 'purple': '#7570b3', } def color(string): if not string: string = 'black' return COLORS[string] # see `NOTICE` in the LaTeX document; this is the width of the main text block. TEXTWIDTH_CM = 12.12364 def inch(cm): return cm / 2.54 def parse_args(): kwcolor = {'type': color, 'default': 'black'} parser = argparse.ArgumentParser( description='Convert a geometry to an image') parser.add_argument('--group1-select') parser.add_argument('--group1-linestyle') parser.add_argument('--group1-color', **kwcolor) parser.add_argument('--group2-select') parser.add_argument('--group2-linestyle') parser.add_argument('--group2-color', **kwcolor) parser.add_argument('--group3-select') parser.add_argument('--group3-linestyle') parser.add_argument('--group3-color', **kwcolor) parser.add_argument('--widthdiv', default=1, type=float, help='Width divisor') parser.add_argument('--quadrant', type=int, choices=(1, 2, 3, 4)) parser.add_argument('-o', '--outfile', metavar='') return parser.parse_args() def read_layer(select, width, maybe_quadrant): if not select: return way = "way" if maybe_quadrant: way = "wm_quadrant(way, {})".format(maybe_quadrant) conn = psycopg2.connect(PSQL_CREDS) sql = "SELECT {way} as way1 FROM {select}".format(way=way, select=select) return geopandas.read_postgis(sql, con=conn, geom_col='way1') def plot_args(geom, color, maybe_linestyle): if geom is None: return # polygons either have fillings or lines if geom.geom_type[0] == 'Polygon': if maybe_linestyle: return { 'edgecolor': 'black', 'linestyle': maybe_linestyle, 'color': (0, 0, 0, 0), } else: return {'cmap': CMAP, 'alpha': .25} r = {'color': color} if maybe_linestyle == 'invisible': r['color'] = (0, 0, 0, 0) elif maybe_linestyle: r['linestyle'] = maybe_linestyle return r def main(): args = parse_args() width = TEXTWIDTH_CM / args.widthdiv group1 = read_layer(args.group1_select, width, args.quadrant) group2 = read_layer(args.group2_select, width, args.quadrant) group3 = read_layer(args.group3_select, width, args.quadrant) c1 = plot_args(group1, args.group1_color, args.group1_linestyle) c2 = plot_args(group2, args.group2_color, args.group2_linestyle) c3 = plot_args(group3, args.group3_color, args.group3_linestyle) rc('text', usetex=True) fig, ax = plt.subplots() fig.set_figwidth(inch(width)) group1 is not None and group1.plot(ax=ax, linewidth=.75, **c1) group2 is not None and group2.plot(ax=ax, linewidth=.75, **c2) group3 is not None and group3.plot(ax=ax, linewidth=.75, **c3) ax.axis('off') ax.margins(0, 0) if args.outfile: fig.savefig(args.outfile, bbox_inches='tight', dpi=600) else: plt.show() if __name__ == '__main__': main()