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Fix osm generation if contour shapefile is empty, now return empty osm file.

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This commit is contained in:
yvecai 2012-10-21 23:41:43 +02:00
parent c615b8adce
commit 82c7569da4
1 changed files with 56 additions and 54 deletions
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110
config/contours/V3/srtmshp2osm.py
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@ -2,7 +2,6 @@
import shapefile
import os, sys
from lxml import etree
from optparse import OptionParser
def listsplit(tosplit, n=50):
@ -36,63 +35,66 @@ if not options.inputfilename:
exit(1)
out=open(options.outputfilename,'w')
sf = shapefile.Reader(options.inputfilename)
shapeRecs = sf.shapeRecords()
print "shp loaded"
out.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>")
out.write("<osm generator=\"srtmshp2osm\" version=\"0.6\">")
index= 3000000000
l=len(shapeRecs)
for shapeRec in shapeRecs:
height=int(shapeRec.record[1]) # there only one field in my shapefile, 'HEIGHT'
pointList=shapeRec.shape.points # [[x1,y1],[x2,y2]...]
splitPointList=listsplit(pointList,100)
for points in splitPointList:
# nodes:
firstindex = index
for p in points:
node = etree.Element("node",
id=str(index),
lat=str(p[1]),
lon=str(p[0]),
version="1")
out.write(etree.tostring(node, pretty_print=options.pretty))
index +=1
lastindex=index-1
sf = shapefile.Reader(options.inputfilename)
if len(sf.shapes()) != 0:
# read shapeRecords only if non-empty
shapeRecs = sf.shapeRecords()
print "shp loaded"
index= 3000000000
l=len(shapeRecs)
for shapeRec in shapeRecs:
height=int(shapeRec.record[1]) # there only one field in my shapefile, 'HEIGHT'
pointList=shapeRec.shape.points # [[x1,y1],[x2,y2]...]
splitPointList=listsplit(pointList,100)
# way:
way = etree.Element("way", id=str(index),version="1")
index +=1
for i in range(firstindex,lastindex):
way.append(etree.Element("nd", ref=str(i)))
# tags:
way.append(etree.Element("tag",k="elevation", v=str(height)))
way.append(etree.Element("tag",k="contour", v="elevation"))
if height % 100 ==0:
way.append(etree.Element("tag",k="contourtype", v="100m"))
way.append(etree.Element("tag",k="name", v=str(height)))
elif height % 50 ==0:
way.append(etree.Element("tag",k="contourtype", v="50m"))
elif height % 20 ==0:
way.append(etree.Element("tag",k="contourtype", v="20m"))
elif height % 10 ==0:
way.append(etree.Element("tag",k="contourtype", v="10m"))
out.write(etree.tostring(way, pretty_print=options.pretty))
#progress:
l-=1
if not options.quiet:
sys.stdout.write("\r")
sys.stdout.write("% 12d" % l)
sys.stdout.flush()
for points in splitPointList:
# nodes:
firstindex = index
for p in points:
node = etree.Element("node",
id=str(index),
lat=str(p[1]),
lon=str(p[0]),
version="1")
out.write(etree.tostring(node, pretty_print=options.pretty))
index +=1
lastindex=index-1
# way:
way = etree.Element("way", id=str(index),version="1")
index +=1
for i in range(firstindex,lastindex):
way.append(etree.Element("nd", ref=str(i)))
# tags:
way.append(etree.Element("tag",k="elevation", v=str(height)))
way.append(etree.Element("tag",k="contour", v="elevation"))
if height % 100 ==0:
way.append(etree.Element("tag",k="contourtype", v="100m"))
way.append(etree.Element("tag",k="name", v=str(height)))
elif height % 50 ==0:
way.append(etree.Element("tag",k="contourtype", v="50m"))
elif height % 20 ==0:
way.append(etree.Element("tag",k="contourtype", v="20m"))
elif height % 10 ==0:
way.append(etree.Element("tag",k="contourtype", v="10m"))
out.write(etree.tostring(way, pretty_print=options.pretty))
#progress:
l-=1
if not options.quiet:
sys.stdout.write("\r")
sys.stdout.write("% 12d" % l)
sys.stdout.flush()
else:
print "Shapefile was empty"
print ""
out.write("</osm>")