From 73444ead611a4fc308c783c4410c8220902bdc51 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Tue, 14 Jan 2020 15:43:37 +0100
Subject: Initial commit

---
 gpx-to-tsv | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100755 gpx-to-tsv

diff --git a/gpx-to-tsv b/gpx-to-tsv
new file mode 100755
index 0000000..22e6627
--- /dev/null
+++ b/gpx-to-tsv
@@ -0,0 +1,38 @@
+#!/bin/sh
+
+start=$(date +%s)
+
+sed '
+  s/>/\0\n/g
+  s/</\n\0/g
+' \
+| grep -vxF '' \
+| sed -n '
+  /^<gpx[[:space:]>]/,/^<\/gpx>$/ {
+    /^<gpx[[:space:]>]/ d
+    /^<\/gpx>$/ d
+    p
+  }
+' \
+| tr -d '\n' \
+| sed '
+  s@<trkpt @\n\0@g
+  s@</trkpt>@\0\n@g
+' \
+| grep -vxF '' \
+| sed '
+  1 {
+    \@^<metadata>.*</metadata><trk>.*<trkseg>$@ d
+  }
+  s@^<trkpt lat="\([-0-9.]\+\)" lon="\([-0-9.]\+\)"><ele>\([-0-9.]\+\)</ele><time>\([0-9]\{4\}\(-[0-9]\{2\}\)\{2\}T[0-9]\{2\}\(:[0-9]\{2\}\)\{2\}Z\)</time></trkpt>$@\1\t\2\t\3\t\4@
+  t
+  \@^</trkseg><trkseg>$@ d
+  \@^</trkseg></trk>$@ d
+  w /dev/stderr
+' \
+| while read -r lat lon ele time; do
+  printf '%s\t' "${lat}" "${lon}" "${ele}"
+  date -d"${time}" +%s
+done
+
+echo $(($(date +%s)-start))
-- 
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