Hello, can anyone point me in the direction of how one might be able to extract OSM feature information from a GPX file. For example, I would like to determine all the peaks that may have been summited on a GPS track.

asked 06 Sep, 22:56

ClarionRunner's gravatar image

accept rate: 0%

edited 14 Sep, 21:36

aseerel4c26's gravatar image

aseerel4c26 ♦

Do you think of adding these peaks to OSM (contribution) or do you think of, instead, querying the OSM data for nearby peaks (possibly with name infomation) (usage)?

(08 Sep, 19:58) aseerel4c26 ♦

the latter querying the OSM data for nearby peaks

(08 Sep, 20:05) ClarionRunner

The Overpass API around filter queries for elements within a given radius (in meters) along a linestring when given a list of lat/lon pairs:


For example (in Overpass Turbo):

out meta;


There might be better ways, but here is a one-liner for the Linux/Ubuntu command-line to convert a GPX track to the expected linestring format:

ogr2ogr -f CSV /vsistdout/ brouter.gpx tracks -lco GEOMETRY=AS_WKT -simplify 0.001 | \
tail -n +2 | \
sed -e 's/.* (\+\([^)]*\))\+".*/\1/' -e 's/\([0-9\.]*\) \([0-9\.]*\),\?/\2,\1,/g' -e 's/,$//'
  • example GPX track created using an online router
  • uses GDAL ogr2ogr converter (requires gdal-bin package)
    with GPX and CSV with WKT (Well-known Text) formats, as this comes close to expected format
  • outputs to console with "/vsistdout/"
  • "simplify" reduces number of nodes, distance tolerance in degrees, 0.00001° about 1 meter, depending on latitude
  • "tail" skips csv header
  • "sed" extracts coordinates, flips lon/lat and uses all comma, removes trailing comma
permanent link

answered 14 Sep, 20:39

ikonor's gravatar image

accept rate: 27%

edited 14 Sep, 20:43

Thank you so much!!!! Just what I was looking for :)

(17 Sep, 07:05) ClarionRunner

how would I pass this query to https://www.overpass-api.de/api/interpreter from a php file?

(2 days ago) ClarionRunner

The custom shortcut "{{latlons}}" only works in Overpass Turbo. Elsewhere, you need to replace it yourself. You can get an interpreter URL from Overpass Turbo with Export > Data > raw data from Overpass API interpreter: https://wiki.openstreetmap.org/wiki/Overpass_turbo#Data Or use a POST request, see https://overpass-api.de/command_line.html

(2 days ago) ikonor
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question asked: 06 Sep, 22:56

question was seen: 123 times

last updated: 2 days ago

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