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GPX (.gpx)

  • Import fully supports the GPX format Version 1.1.

Background & Context

    • GPX global positioning data.
    • Standard format for exchanging GPS location data.
    • Stores GIS data recorded with GPS devices.
    • GPX is an acronym for GPS Exchange Format.
    • XML format.
    • Introduced in 2002.

Import

  • Import["file.gpx"] imports a GPX file and returns a combined rendering of all graphics layers.
  • Import["file.gpx"] returns a GeoGraphics object.
  • Import["file.gpx","elem"] imports the specified element from a GPX file.
  • Import["file.gpx",{{"elem1","elem2",…}}] imports multiple elements.
  • See the following reference pages for full general information:
  • Importimport from a file
    CloudImportimport from a cloud object
    ImportStringimport from a string
    ImportByteArrayimport from a byte array

Import Elements

  • General Import elements:
  • "Elements" list of elements and options available in this file
    "Summary"summary of the file
    "Rules"list of rules for all available elements
  • Data representation elements:
  • "Data"graphics primitives for each layer
    "Graphics"all layers combined into a single GeoGraphics object
    "GraphicsList"list of graphics representing the layers of a GPX archive
  • Import by default uses the "Graphics" element for the GPX format.
  • Import["file.gpx","Data"] returns an expression of the form {layer1,layer2,layer3} . Individual layers are given as a list of rules representing the geometry as well as numerical and textual information associated with the features.
  • Meta-information elements:
  • "Comments"description of the file as a string
    "LayerNames"all layer names, given as a list of strings
    "Metadata"author and copyright information
    "Name"name given in the file
    "SpatialRange"range of geographic coordinates, typically given in decimal degrees
  • Geographic coordinates in GPX files always refer to the WGS84 datum.

Options

Examples

open allclose all

Basic Examples  (2)Summary of the most common use cases

Import all layers from the file:

In[1]:=1
✖
https://wolfram.com/xid/0dxdt4k3j0-d0g1wu
Out[1]=1

Show a list of all import elements available for this file:

In[1]:=1
✖
https://wolfram.com/xid/0dxdt4k3j0-zit0xa
Out[1]=1

List the layer names from the file:

In[2]:=2
✖
https://wolfram.com/xid/0dxdt4k3j0-n1ghpt
Out[2]=2

Import metadata elements:

In[3]:=3
✖
https://wolfram.com/xid/0dxdt4k3j0-7ry6k8
Out[3]=3

Applications  (2)Sample problems that can be solved with this function

Show the data fields present in this file:

In[1]:=1
✖
https://wolfram.com/xid/0dxdt4k3j0-t86cvk
In[2]:=2
✖
https://wolfram.com/xid/0dxdt4k3j0-d6hadd
Out[2]=2

Show available data labels:

In[3]:=3
✖
https://wolfram.com/xid/0dxdt4k3j0-shkrw0
Out[3]=3

Compute the elevation range for the data:

In[4]:=4
✖
https://wolfram.com/xid/0dxdt4k3j0-mgkok8
Out[4]=4

Plot the elevation profile for the route:

In[5]:=5
✖
https://wolfram.com/xid/0dxdt4k3j0-feouoo
Out[5]=5

Compute the total distance by adding up the line segments:

In[1]:=1
✖
https://wolfram.com/xid/0dxdt4k3j0-cz0aj2
Out[1]=1