facilmap_to_osmand_gpx.py

import json
import os
from lxml import etree

import geopandas as gpd


def osm_replace(file, track=False):
    f = open(file, "r", encoding="UTF-8")
    data = f.read()

    # replace all extensions with osm and specific namespaces and names
    data = data.replace(
        '<gpx version="1.1" creator="GDAL 3.6.4" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ogr="http://osgeo.org/gdal" xmlns="http://www.topografix.com/GPX/1/1" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">',
        '<gpx version="1.1" creator="OsmAnd" xmlns="http://www.topografix.com/GPX/1/1" xmlns:osmand="https://osmand.net" xmlns:test="https://test.net" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">'
    )

    data = data.replace('<ogr:', '<osmand:')
    data = data.replace('</ogr:', '</osmand:')

    data = data.replace('osmand:shape', 'osmand:background')  # circle, square, octagon
    data = data.replace('>star<', '>octagon<')

    data = data.replace('osmand:symbol', 'osmand:icon')
    data = data.replace('sport_swimming_outdoor', 'sport_swimming')
    data = data.replace('eye-open', 'information_guidepost')
    data = data.replace('food_restaurant', 'restaurants')
    data = data.replace('walk', 'special_trekking')
    data = data.replace('accommodation_camping', 'tourism_camp_site')

    data = data.replace('<osmand:colour>', '<osmand:colour>#')

    if track:
        data = data.replace('<rte>', '<trk>')
        data = data.replace('</rte>', '</trk>')

        data = data.replace('<rtept', '<trkpt')
        data = data.replace('</rtept>', '</trkpt>')

    f = open(file, "w", encoding="UTF-8")
    f.write(data)


def split_description(tree):
    # take description dictionary and add as individual fields
    for elem in tree.findall(".//{*}extensions"):
        data_element = elem.find('.//{*}data')
        element_data = json.loads(data_element.text)
        for k in list(element_data.keys()):
            new_element = etree.Element(f'{k.replace(" ", "")}')
            new_element.text = element_data[k]
            elem.append(new_element)
        data_element.getparent().remove(data_element)

    return tree


# -------------------------------
# ------------------ handle points
# -------------------------------

INPUT_FILE = 'input.geojson'
OUTPUT_FILE = os.path.join('output', 'points.gpx')

gdf = gpd.read_file(INPUT_FILE)
gdf = gdf[gdf.typeId == 1]
gdf = gdf.drop('time', axis=1)

# ogr2ogr -ntl POINT -f GPX output.gpx input.geojson
gdf.to_file(OUTPUT_FILE, 'GPX', GPX_USE_EXTENSIONS=True)

osm_replace(OUTPUT_FILE)

tree = split_description(etree.parse(OUTPUT_FILE))
tree.write(OUTPUT_FILE)

# -------------------------------
# ------------------ handle tracks
# -------------------------------
INPUT_FILE = 'input.geojson'
TRACKS_FOLDER = os.path.join('output', 'tracks')

for f in os.listdir(TRACKS_FOLDER):
    os.remove(os.path.join(TRACKS_FOLDER, f))

gdf = gpd.read_file(INPUT_FILE)
gdf = gdf[gdf.typeId != 1]
gdf = gdf.drop('time', axis=1)

for i in range(len(gdf)):
    OUTPUT_FILE = os.path.join(TRACKS_FOLDER, f'{gdf.iloc[[i]].iat[0, 0].replace(" ", "_")}.gpx')

    gdf.iloc[[i]].to_file(OUTPUT_FILE, 'GPX', GPX_USE_EXTENSIONS=True)

    osm_replace(OUTPUT_FILE, track=True)

    etree.register_namespace("osmand", "https://osmand.net")

    tree = etree.parse(OUTPUT_FILE)
    for elem in tree.findall(".//{*}extensions"):
        data_element = elem.find('.//{*}data')
        element_data = json.loads(data_element.text)

        new_element = etree.Element(etree.QName("https://osmand.net", "width"))
        new_element.text = 'bold'
        elem.append(new_element)
        tree.getroot().append(elem)

        meta = tree.find('.//{*}metadata')
        ext = etree.Element('extensions')
        desc = etree.Element(etree.QName("https://osmand.net", "desc"))
        desc.text = '\n\n'.join([f'{key}: {value}' for key, value in json.loads(data_element.text).items()])
        ext.append(desc)
        meta.append(ext)

        tree.write(OUTPUT_FILE)