1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
##+##########################################################################
#
# gpx.tcl -- Parse gpx files
# by Keith Vetter, July 7, 2010
#
# gpx definition:
# http://www.topografix.com/gpx.asp
# http://www.topografix.com/GPX/1/1/
# GPX 1.0 => http://www.topografix.com/gpx_manual.asp
#
# code reference:
# http://wiki.tcl.tk/26635
# API
# set token [::gpx::Create gpxFilename]
# ::gpx::Cleanup $token
# ::gpx::GetGPXMetadata $token => dict of metadata
# ::gpx::GetWaypointCount $token => number of waypoints
# ::gpx::GetAllWaypoints $token => list of waypoint items
# ::gpx::GetTrackCount $token => number of tracks
# ::gpx::GetTrackMetadata $token $whichTrack => dict of metadata for this track
# ::gpx::GetTrackPoints $token $whichTrack => list of trkpts for this track
# ::gpx::GetRouteCount $token => number of routes
# ::gpx::GetRouteMetadata $token $whichRoute => dict of metadata for this route
# ::gpx::GetRoutePoints $token $whichRoute => list of rtepts for this route
#
# o metadata is a dictionary whose keys depends on the which optional elements
# are present and whose structure depends on the element's schema
#
# o a waypoint/trackpoint is a 3 element list consisting of latitude,
# longitude and a dictionary of metadata:
# e.g. 41.61716028 -70.61758477 {ele 35.706 time 2010-06-17T16:02:28Z}
#
package require Tcl 8.5
package require tdom
namespace eval gpx {
variable nameSpaces {
gpx "http://www.topografix.com/GPX/1/1"
xsi "http://www.w3.org/2001/XMLSchema-instance"
}
# gpx 1.0 was obsoleted August 9, 2004, but we handle it anyway
variable nameSpaces10 {
gpx "http://www.topografix.com/GPX/1/0"
topografix "http://www.topografix.com/GPX/Private/TopoGrafix/0/2"
}
variable gpx
set gpx(id) 0
# Cleanup any existing doms if we reload this module
::apply {{} {
foreach arr [array names ::gpx::gpx dom,*] {
catch {$::gpx::gpx($arr) delete}
unset ::gpx::gpx($arr)
}
}}
}
##+##########################################################################
#
# ::gpx::Create -- Creates a tdom object, returns opaque token to it
# parameters: gpxFilename
# returns: token for this tdom object
#
proc ::gpx::Create {gpxFilename {rawXML {}}} {
variable nameSpaces
variable gpx
if {$rawXML eq ""} {
set fin [open $gpxFilename r]
set rawXML [read $fin] ; list
close $fin
}
set token "gpx[incr gpx(id)]"
dom parse $rawXML gpx(dom,$token)
# Check version 1.0, 1.1 or fail
set version [[$gpx(dom,$token) documentElement] getAttribute version 0.0]
if {[package vcompare $version 1.1] >= 0} {
$gpx(dom,$token) selectNodesNamespaces $::gpx::nameSpaces
} elseif {[package vcompare $version 1.0] == 0} {
$gpx(dom,$token) selectNodesNamespaces $::gpx::nameSpaces10
} else {
$gpx(dom,$token) delete
error "$gpxFilename is version $version, need 1.0 or better"
}
set gpx(version,$token) $version
return $token
}
##+##########################################################################
#
# ::gpx::Cleanup -- Cleans up an instance of a tdom object
# parameter: token returned by ::gpx::Create
#
proc ::gpx::Cleanup {token} {
variable gpx
$gpx(dom,$token) delete
unset gpx(dom,$token)
}
##+##########################################################################
#
# ::gpx::GetGPXMetadata -- Return metadata dictionary for entire document
# parameter: token returned by ::gpx::Create
# returns: metadata dictionary for entire document
#
proc ::gpx::GetGPXMetadata {token} {
set gpxNode [$::gpx::gpx(dom,$token) documentElement]
set version $::gpx::gpx(version,$token)
set creator [$gpxNode getAttribute creator ?]
set attr [dict create version $version creator $creator]
if {[package vcompare $version 1.0] == 0} {
set result [::gpx::_ExtractNodeMetadata $token $gpxNode]
} else {
set meta [$::gpx::gpx(dom,$token) selectNodes /gpx:gpx/gpx:metadata]
set result [::gpx::_ExtractNodeMetadata $token $meta]
}
set result [dict merge $attr $result]
return $result
}
##+##########################################################################
#
# ::gpx::GetWaypointCount -- Return number of waypoints defined in gpx file
# parameter: token returned by ::gpx::Create
# returns: number of waypoints
#
proc ::gpx::GetWaypointCount {token} {
set wpts [$::gpx::gpx(dom,$token) selectNodes /gpx:gpx/gpx:wpt]
return [llength $wpts]
}
##+##########################################################################
#
# ::gpx::GetAllWaypoints -- Returns list of waypoints, each item consists
# of {lat lon <dictionary of metadata>}
# parameter: token returned by ::gpx::Create
# returns: list of waypoint items
#
proc ::gpx::GetAllWaypoints {token} {
set wpts [$::gpx::gpx(dom,$token) selectNodes /gpx:gpx/gpx:wpt]
set result {}
foreach wpt $wpts {
set lat [$wpt getAttribute "lat" ?]
set lon [$wpt getAttribute "lon" ?]
set meta [::gpx::_ExtractNodeMetadata $token $wpt]
lappend result [list $lat $lon $meta]
}
return $result
}
##+##########################################################################
#
# ::gpx::GetTrackCount -- returns how many tracks
# parameter: token returned by ::gpx::Create
# returns: number of tracks
#
proc ::gpx::GetTrackCount {token} {
set trks [$::gpx::gpx(dom,$token) selectNodes /gpx:gpx/gpx:trk]
return [llength $trks]
}
##+##########################################################################
#
# ::gpx::GetTrackMetadata -- Returns metadata dictionary for this track
# parameter: token returned by ::gpx::Create
# whichTrack: which track to get (1 based)
# returns: metadata dictionary for this track
#
proc ::gpx::GetTrackMetadata {token whichTrack} {
set trkNode [$::gpx::gpx(dom,$token) selectNodes \
/gpx:gpx/gpx:trk\[$whichTrack\]]
set meta [::gpx::_ExtractNodeMetadata $token $trkNode]
}
##+##########################################################################
#
# ::gpx::GetTrackPoints -- Returns track consisting of a list of track points,
# each of which consists of {lat lon <dictionary of metadata>}
# parameter: token returned by ::gpx::Create
# whichTrack: which track to get (1 based)
# returns: list of trackpoints for given track
#
proc ::gpx::GetTrackPoints {token whichTrack} {
set trkpts [$::gpx::gpx(dom,$token) selectNodes \
/gpx:gpx/gpx:trk\[$whichTrack\]//gpx:trkpt]
set result {}
foreach trkpt $trkpts {
set lat [$trkpt getAttribute "lat" ?]
set lon [$trkpt getAttribute "lon" ?]
set meta [::gpx::_ExtractNodeMetadata $token $trkpt]
lappend result [list $lat $lon $meta]
}
return $result
}
##+##########################################################################
#
# ::gpx::GetRouteCount -- returns how many routes
# parameter: token returned by ::gpx::Create
# returns: number of routes
#
proc ::gpx::GetRouteCount {token} {
set rtes [$::gpx::gpx(dom,$token) selectNodes /gpx:gpx/gpx:rte]
return [llength $rtes]
}
##+##########################################################################
#
# ::gpx::GetRouteMetadata -- Returns metadata dictionary for this route
# parameter: token returned by ::gpx::Create
# whichRoute: which route to get (1 based)
# returns: metadata dictionary for this route
#
proc ::gpx::GetRouteMetadata {token whichRoute} {
set rteNode [$::gpx::gpx(dom,$token) selectNodes \
/gpx:gpx/gpx:rte\[$whichRoute\]]
set meta [::gpx::_ExtractNodeMetadata $token $rteNode]
}
##+##########################################################################
#
# ::gpx::GetRoutePoints -- Returns route consisting of a list of route points,
# each of which consists of {lat lon <dictionary of metadata>}
# parameter: token returned by ::gpx::Create
# whichRoute: which route to get (1 based)
# returns: list of routepoints for given route
#
proc ::gpx::GetRoutePoints {token whichRoute} {
set rtepts [$::gpx::gpx(dom,$token) selectNodes \
/gpx:gpx/gpx:rte\[$whichRoute\]//gpx:rtept]
set result {}
foreach rtept $rtepts {
set lat [$rtept getAttribute "lat" ?]
set lon [$rtept getAttribute "lon" ?]
set meta [::gpx::_ExtractNodeMetadata $token $rtept]
lappend result [list $lat $lon $meta]
}
return $result
}
##+##########################################################################
#
# ::gpx::_ExtractNodeMetadata -- Internal routine to get all
# the optional data associated with an xml element. For most
# elements we just want element name and text value but some
# we want their attributes and some we want children metadata.
#
proc ::gpx::_ExtractNodeMetadata {token node} {
set result {}
if {$node eq ""} { return $result }
# author and email elements are different in version 1.0 and 1.1
set onlyAttributes [list "bounds" "email"]
set attributesAndElements [list "extension" "author" "link" "copyright"]
if {$::gpx::gpx(version,$token) == 1.0} {
set onlyAttributes [list "bounds"]
set attributesAndElements [list "extension" "link" "copyright"]
}
foreach child [$node childNodes] {
set nodeName [$child nodeName]
if {$nodeName in {"wpt" "trk" "trkseg" "trkpt" "rte" "rtept"}} continue
if {[string match "topografix:*" $nodeName]} continue
if {$nodeName in $onlyAttributes} {
set attr [::gpx::_GetAllAttributes $child]
lappend result $nodeName $attr
} elseif {$nodeName in $attributesAndElements} {
set attr [::gpx::_GetAllAttributes $child]
set meta [::gpx::_ExtractNodeMetadata $token $child]
set meta [concat $attr $meta]
lappend result $nodeName $meta
} else {
lappend result $nodeName [$child asText]
}
}
return $result
}
##+##########################################################################
#
# ::gpx::_GetAllAttributes -- Returns dictionary of attribute name and value
#
proc ::gpx::_GetAllAttributes {node} {
set result {}
foreach attr [$node attributes] {
lappend result $attr [$node getAttribute $attr]
}
return $result
}
################################################################
package provide gpx 1
return
|