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scrape.encode.py
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scrape.encode.py
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""" Copyright (C) 2009-2014 Greg Landrum
Need something like this at the top of the page:
#-------------
<script src='http://www.google.com/jsapi?key=AIzaSyAltYAof0Tum7c4Te_OufSfPBKMeTNpcfw' type='text/javascript'/>
<script type='text/javascript'>
//<![CDATA[
google.load("maps", "2");
google.load('visualization', '1',{'packages':['corechart']});
function drawVisualizations() {
var divs = document.getElementsByTagName('div');
for(var i=0;i<divs.length;i++){
var div = divs[i];
if( div.className.search('gpsplt')!=-1){
var idx = div.className.split('_')[1];
var dtbl = eval('dtbl_'+idx);
drawVisualization(dtbl,div);
}
}
}
function drawVisualization(dT,div) {
chart=new google.visualization.ComboChart(div);
options={seriesType:'line',
series:{2:{type:'scatter'},3:{type:'scatter'}},
vAxis:{title:'Height (m)'},
hAxis:{title:'Distance (km)'},
legend:{position:'none'}
};
chart.draw(dT,options);
}
function initFunc() {
var divs = document.getElementsByTagName('div');
for(var i=0;i<divs.length;i++){
var div = divs[i];
if( div.className.search('gpsmap')!=-1){
var idx = div.className.split('_')[1];
var mapCenter = eval('mapCenter_'+idx);
var mapZoom = 11;
if(eval('typeof(zoom_'+idx+')')!='undefined') mapZoom=eval('zoom_'+idx);
var map = new google.maps.Map2(div);
map.addControl(new google.maps.HierarchicalMapTypeControl());
map.addMapType(G_PHYSICAL_MAP);
map.addControl(new google.maps.SmallMapControl());
map.addControl(new google.maps.ScaleControl());
map.setCenter(mapCenter, mapZoom, G_PHYSICAL_MAP);
var polyline=0;
if(eval('typeof(polyline_'+idx+')')!='undefined') polyline=eval('polyline_'+idx);
if(polyline){
map.addOverlay(polyline);
} else{
var j=0;
while(1){
if(eval('typeof(polyline_'+idx+'_'+j+')')!='undefined'){
polyline=eval('polyline_'+idx+'_'+j);
} else {javascript:;
polyline=0;
}
if(!polyline){
break;
} else {
map.addOverlay(polyline);
}
j++;
}
}
}
}
drawVisualizations()
}
google.setOnLoadCallback(initFunc);
//]]>
</script>
//]]>
</script>
#-------------
"""
import random,urllib,zlib,base64
idx = random.randint(1,10000000)
import glineenc
import sys,re,os
lineColor = "#3333FF"
lineOpacity = .8
lineWidth = 2
zoom=11
mapWidth=400
mapHeight=400
maxPairs = 2000
if len(sys.argv)==3 and sys.argv[2]!='-' and os.path.splitext(sys.argv[2])[-1]!='.gpx':
outF = file(sys.argv[2],'w+')
inNames = [sys.argv[1]]
else:
outF = sys.stderr
inNames = sys.argv[1:]
fullPage=False
if fullPage:
template="""<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Andrea's Photoalbum</title>
<script src="http://www.google.com/jsapi?key=ABQIAAAA-2_6nxv3s-pbeQzc-voYbBSslllT-6jKSoB3IsditEijrmLKghSHFCu4KsAz3bQiG2RQ1zLa5nMXrg"
type="text/javascript">
</script>
<script type="text/javascript">
//<![CDATA[
google.load("maps", "2");
function initFunc() {
var divs = document.getElementsByTagName('div');
for(var i=0;i<divs.length;i++){
var div = divs[i];
if( div.className.search('gpsmap')==0){
var idx = div.className.split('_')[1];
var mapCenter = eval('mapCenter_'+idx);
var polyline = eval('polyline_'+idx);
var mapZoom = 11;
if(eval('typeof(zoom_'+idx+')')!='undefined') mapZoom=eval('zoom_'+idx);
if(!mapZoom) mapZoom=11;
var map = new google.maps.Map2(div);
map.addControl(new google.maps.HierarchicalMapTypeControl());
map.addMapType(G_PHYSICAL_MAP);
map.addControl(new google.maps.SmallMapControl());
map.addControl(new google.maps.ScaleControl());
map.setCenter(mapCenter, mapZoom, G_PHYSICAL_MAP);
map.addOverlay(polyline);
}
}
}
google.setOnLoadCallback(initFunc);
//]]>
</script>
</head>
<body onunload="google.maps.Unload()" bgcolor="#999999" text="#101010" link="#333333" vlink="#dddddd">
<p>foo</p>
<hr />
<script type="text/javascript"> /*<![CDATA[ */ var mapCenter_%(idx)d=new google.maps.LatLng(%(latit)f,%(longit)f); var polyline_%(idx)d=new google.maps.Polyline.fromEncoded({opacity:"%(lineOpacity).1f",color:"%(lineColor)s",weight:%(lineWidth)d,points:"%(encoding)s",levels:"%(levels)s",zoomFactor:32,numLevels:4}); /* ]]>*/ </script>
<div align='center' class="gpsmap_%(idx)d" style="width: %(mapWidth)dpx; height: %(mapHeight)dpx"></div>
<hr />
<p>bar</p>
</body>
</html>
"""
else:
template="""
<script type="text/javascript"> /*<![CDATA[ */ var mapCenter_%(idx)d=new google.maps.LatLng(%(latit)f,%(longit)f); %(pointsText)s /* ]]>*/ </script>
<div align='center' class="gpsmap_%(idx)d" style="width: %(mapWidth)dpx; height: %(mapHeight)dpx"></div>
"""
from xml.etree import cElementTree as ET
data=[]
for inF in inNames:
line=[]
inF = open(inF,'r')
et = ET.ElementTree(file=inF)
pts = et.findall('.//{http://www.topografix.com/GPX/1/1}trkpt')
if not pts:
pts = et.findall('.//{http://www.topografix.com/GPX/1/0}trkpt')
if not pts:
pts = et.findall('.//{http://www.topografix.com/GPX/1/0}rtept')
if not pts:
pts = et.findall('.//{http://www.topografix.com/GPX/1/1}rtept')
if not pts:
raise ValueError('could not find any points')
for pt in pts:
line.append((float(pt.get('lat')),float(pt.get('lon'))))
data.append(line)
center=[0.,0.]
totN=0
pointsText=""
for i,line in enumerate(data):
pairs = [(pt[0],pt[1]) for pt in line]
# no sense keeping more than 2K pairs:
if len(pairs)>maxPairs:
skip = len(pairs)//maxPairs
pairs = pairs[:len(pairs):skip]
txtPairs=["%.6f %.6f"%(x,y) for x,y in pairs]
ptsPkl = base64.b64encode(zlib.compress(str(txtPairs).encode('utf-8')))
encoding,levels = glineenc.encode_pairs(pairs)
encoding=encoding.replace('\\','\\\\')
for pt in line:
latit = pt[0]
longit = pt[1]
center[0] += latit
center[1] += longit
totN+=1
if len(data)==1:
pointsText+="""var polyline_%(idx)d=new google.maps.Polyline.fromEncoded({opacity:"%(lineOpacity).1f",color:"%(lineColor)s",weight:%(lineWidth)d,points:"%(encoding)s",levels:"%(levels)s",zoomFactor:32,numLevels:4}); var ptsArchive="%(ptsPkl)s"; /*decode from python with: zlib.decompress(base64.b64decode(ptsArchive))*/"""%locals()
else:
pointsText+="""var polyline_%(idx)d_%(i)d=new google.maps.Polyline.fromEncoded({opacity:"%(lineOpacity).1f",color:"%(lineColor)s",weight:%(lineWidth)d,points:"%(encoding)s",levels:"%(levels)s",zoomFactor:32,numLevels:4}); var ptsArchive_%(i)d="%(ptsPkl)s"; /*decode from python with: zlib.decompress(base64.b64decode(ptsArchive))*/"""%locals()
latit,longit=center
latit /= totN
longit /= totN
print(template%locals(),file=outF)