92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
#!/usr/bin/python3
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import argparse
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import geopandas
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import psycopg2
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import matplotlib.pyplot as plt
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from matplotlib import rc
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# CMAP = 'Set3' # this is nice too
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CMAP = 'tab20c'
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BOUNDS = ('xmin', 'ymin', 'xmax', 'ymax')
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BLACK, GREEN, ORANGE, PURPLE = '#000000', '#1b9e77', '#d95f02', '#7570b3'
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PSQL_CREDS = "host=127.0.0.1 dbname=osm user=osm password=osm"
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def parse_args():
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parser = argparse.ArgumentParser(
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description='Convert geopackage to an image')
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parser.add_argument('--group1-table')
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parser.add_argument('--group1-where')
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parser.add_argument('--group1-cmap', type=bool)
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parser.add_argument('--group1-linestyle')
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parser.add_argument('--group2-table')
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parser.add_argument('--group2-where')
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parser.add_argument('--group2-cmap', type=bool)
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parser.add_argument('--group2-linestyle')
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parser.add_argument('--group3-table')
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parser.add_argument('--group3-where')
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parser.add_argument('--group3-cmap', type=bool)
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parser.add_argument('--group3-linestyle')
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parser.add_argument('--widthdiv',
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default=1, type=float, help='Width divisor')
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parser.add_argument('-o', '--outfile', metavar='<file>')
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parser.add_argument('--clip', type=float, nargs=4, metavar=BOUNDS)
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return parser.parse_args()
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def read_layer(table, maybe_where=None):
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if not table:
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return
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conn = psycopg2.connect(PSQL_CREDS)
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sql = "SELECT way FROM %s" % table
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if maybe_where:
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sql += " WHERE %s" % maybe_where
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return geopandas.read_postgis(sql, con=conn, geom_col='way')
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def plot_args(color, maybe_cmap, maybe_linestyle):
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if maybe_cmap:
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r = {'cmap': CMAP}
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else:
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r = {'color': color}
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if maybe_linestyle:
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r['linestyle'] = maybe_linestyle
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return r
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def main():
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args = parse_args()
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group1 = read_layer(args.group1_table, args.group1_where)
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group2 = read_layer(args.group2_table, args.group2_where)
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group3 = read_layer(args.group3_table, args.group3_where)
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c1 = plot_args(BLACK, args.group1_cmap, args.group1_linestyle)
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c2 = plot_args(ORANGE, args.group2_cmap, args.group2_linestyle)
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c3 = plot_args(GREEN, args.group3_cmap, args.group3_linestyle)
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rc('text', usetex=True)
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fig, ax = plt.subplots()
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fig.set_figwidth(8.27 / args.widthdiv)
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if c := args.clip:
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ax.set_xlim(left=c[0], right=c[2])
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ax.set_ylim(bottom=c[1], top=c[3])
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group1 is not None and group1.plot(ax=ax, **c1)
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group2 is not None and group2.plot(ax=ax, **c2)
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group3 is not None and group3.plot(ax=ax, **c3)
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ax.axis('off')
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ax.margins(0, 0)
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if args.outfile:
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fig.savefig(args.outfile, bbox_inches='tight', dpi=600)
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else:
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plt.show()
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if __name__ == '__main__':
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main()
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