121 lines
3.5 KiB
Python
121 lines
3.5 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' # is nice too
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CMAP = 'tab20c'
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BOUNDS = ('xmin', 'ymin', 'xmax', 'ymax')
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INCH_MM = 25.4
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INCH_CM = INCH_MM / 10
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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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# see `NOTICE` in the LaTeX document; this is the width of the main text block.
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TEXTWIDTH_CM = 12.12364
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TEXTWIDTH_INCH = TEXTWIDTH_CM * 10 / INCH_MM
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SCALES = {
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"GDR10": 10000,
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"GDR50": 50000,
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"GDR250": 250000,
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}
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def wm_clip(string):
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if not string:
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return None
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name, gdr = string.split(":")
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if scale := SCALES.get(gdr):
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return name, scale
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scales = ",".join(SCALES.keys())
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raise argparse.ArgumentTypeError("invalid scale. Expected %s" % scales)
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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-select', required=True)
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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-select')
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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-select')
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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('--wmclip',
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type=wm_clip,
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help="Clip for scale. E.g. salcia-visincia:GDR10",
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)
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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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return parser.parse_args()
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def read_layer(select, width_in, maybe_wmclip):
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if not select:
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return
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way = "way"
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if maybe_wmclip:
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name, scale = maybe_wmclip
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way = "st_intersection(way, wm_bbox('{name}', {scale}, {width}))".format(
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name=name,
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scale=scale,
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width=width_in * INCH_CM,
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)
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conn = psycopg2.connect(PSQL_CREDS)
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sql = "SELECT {way} as way1 FROM {select}".format(way=way, select=select)
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return geopandas.read_postgis(sql, con=conn, geom_col='way1')
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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 == 'invisible':
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r['color'] = (0, 0, 0, 0)
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elif 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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width = TEXTWIDTH_INCH / args.widthdiv
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group1 = read_layer(args.group1_select, width, args.wmclip)
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group2 = read_layer(args.group2_select, width, args.wmclip)
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group3 = read_layer(args.group3_select, width, args.wmclip)
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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(width)
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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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