6 files changed, 153 insertions, 0 deletions

diff --git a/bin/gpx/footer b/bin/gpx/footer
new file mode 100644
index 0000000..d0759c0
--- /dev/null
+++ b/bin/gpx/footer
@@ -0,0 +1 @@
+</gpx>
diff --git a/bin/gpx/gpx.check.py b/bin/gpx/gpx.check.py
new file mode 100755
index 0000000..10be97c
--- /dev/null
+++ b/bin/gpx/gpx.check.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import argparse
+import copy
+import fileinput
+from osgeo import ogr
+import osr
+import urllib.parse
+
+def rewrite_gpx(filename):
+    for line in fileinput.input(filename, inplace=True):
+        if fileinput.isfirstline() and "'" in line:
+            line = '<?xml version="1.0" encoding="UTF-8"?>'
+        if fileinput.filelineno() == 2 and "version" not in line:
+            line = line.replace('<gpx', '<gpx version="1.1"')
+        print(line.rstrip('\n'))
+
+def check_valid(filename, threshold, add_prefix):
+    rewrite_gpx(filename)
+
+    driver = ogr.GetDriverByName('GPX')
+    try:
+        dataSource = driver.Open(filename)
+    except Exception:
+        pass
+    if dataSource is None:
+        print("could not open")
+        sys.exit(1)
+
+    inSpatialRef = osr.SpatialReference()
+    inSpatialRef.ImportFromEPSG(4326)
+    outSpatialRef = osr.SpatialReference()
+    outSpatialRef.ImportFromEPSG(3857)
+    to3857 = osr.CoordinateTransformation(inSpatialRef, outSpatialRef)
+    to4326 = osr.CoordinateTransformation(outSpatialRef, inSpatialRef)
+
+    trkLayer = dataSource.GetLayer(4)
+    trkpt = trkLayer.GetNextFeature()
+    flag = False
+    while trkpt:
+        nextTrkpt = trkLayer.GetNextFeature()
+        if nextTrkpt:
+            geom1 = trkpt.GetGeometryRef()
+            geom1.Transform(to3857)
+            geom2 = nextTrkpt.GetGeometryRef()
+            geom2.Transform(to3857)
+            distance = geom1.Distance(geom2)
+
+            geom1.Transform(to4326)
+            geom2.Transform(to4326)
+            if distance >= threshold:
+                if not flag:
+                    print(f'{filename} has problem, the following urls shows the points with distance far from {threshold}m:')
+                    print()
+                    flag = True
+                    if add_prefix:
+                        dir = os.path.dirname(filename)
+                        if dir:
+                            dir += '/'
+                        os.rename(filename, f'{dir}invalid_{os.path.basename(filename)}')
+
+                geojson = '{{"type": "LineString", "coordinates": [[{}, {}], [{}, {}]]}}'.format(
+                    geom1.GetX(), geom1.GetY(),
+                    geom2.GetX(), geom2.GetY()
+                )
+                encoded = urllib.parse.quote(geojson)
+                print('http://geojson.io/#data=data:application/json,{}'.format(encoded))
+                print()
+        else:
+            break
+        trkpt = nextTrkpt
+
+def main(argv):
+    parser = argparse.ArgumentParser()
+    parser.add_argument('file', help="you can add multiple gpx files at the same time", nargs='+')
+    parser.add_argument("-i", help="add prefix to invalid files", action="store_true")
+    parser.add_argument("-d", help="distance of tolerance(m), 100 by default", dest="distance", default=100)
+    args = parser.parse_args()
+    for file in args.file:
+        check_valid(file, float(args.distance), args.i)
+
+if __name__ == '__main__':
+    main(sys.argv)
diff --git a/bin/gpx/gpx.merge_gpx.sh b/bin/gpx/gpx.merge_gpx.sh
new file mode 100755
index 0000000..4b024a7
--- /dev/null
+++ b/bin/gpx/gpx.merge_gpx.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+GPX_DIR=$(dirname $0)
+
+sed '/<trk/,/<\/trk>/ p' -nr | cat $GPX_DIR/header - $GPX_DIR/footer
diff --git a/bin/gpx/gpx.merge_trk.sh b/bin/gpx/gpx.merge_trk.sh
new file mode 100755
index 0000000..c3a72d4
--- /dev/null
+++ b/bin/gpx/gpx.merge_trk.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+sed '/<trk>/,/<\/name>/ d; /<\/trk>/ d; /<\/gpx>/ i \ \ <\/trk>' |\
+awk '/<trkseg>/ && !x {print "  <trk>\n    <name>combined_trk</name>"; x=1} 1'
diff --git a/bin/gpx/gpx2geojson.sh b/bin/gpx/gpx2geojson.sh
new file mode 100755
index 0000000..eefcf5e
--- /dev/null
+++ b/bin/gpx/gpx2geojson.sh
@@ -0,0 +1,48 @@
+#! /bin/bash
+
+<$1 xq '.gpx |
+  (
+    label $out |
+    if .wpt != null then [.wpt] else break $out end |
+    flatten[] |
+    {
+      type: "Feature",
+      properties: { name: .name },
+      geometry: {
+        type: "Point",
+        coordinates: [
+          (.["@lon"]|tonumber),
+          (.["@lat"]|tonumber),
+          (.ele | if . == null then null else tonumber end)
+        ]
+      }
+    }
+  ),
+  (
+    label $out |
+    if .trk != null then [.trk] else break $out end |
+    flatten[] |
+    {
+      type: "Feature",
+      properties: { name: .name },
+      geometry: {
+        type: "MultiLineString",
+        coordinates:
+          [.trkseg] | flatten | map(
+            .trkpt | map(
+              [
+                (.["@lon"]|tonumber),
+                (.["@lat"]|tonumber),
+                (.ele | if . == null then null else tonumber end)
+              ]
+            )
+          )
+      }
+    }
+  )
+' | jq -s '
+  {
+    type: "FeatureCollection",
+    features: .
+  }
+'
diff --git a/bin/gpx/header b/bin/gpx/header
new file mode 100644
index 0000000..1912e8b
--- /dev/null
+++ b/bin/gpx/header
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<gpx xmlns="http://www.topografix.com/GPX/1/1" creator="MapSource 6.10.2" version="1.1" 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">
+
+  <metadata>
+    <link href="http://www.garmin.com">
+      <text>Garmin International</text>
+    </link>
+    <time>2019-12-18T06:17:16Z</time>
+    <bounds maxlat="24.554773" maxlon="121.293261" minlat="24.534487" minlon="121.284309"/>
+  </metadata>