Hi Gerd
I'm coming to the conclusion that water.osm is invalid.
I've attached an example part. This goes through the cut-line following
the same path in and out, and defines both shape and a hole at the same
time, which is impossible without the lines crossing.
Ticker
<gpx xmlns="http://www.topografix.com/GPX/1/1" creator="mkgmap" version="1.1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.topografix.com/GPX/1/1
http://www.topografix.com/GPX/1/1/gpx.xsd">
<trk><name>V45802496_3182268/N4_hp</name><trkseg><trkpt lat="68.28735206276178"
lon="15.356483459472656"/><trkpt lat="68.28735206276178"
lon="15.344434306025505"/><trkpt lat="68.28927520662546"
lon="15.344434306025505"/><trkpt lat="68.28927520662546"
lon="15.343786887824535"/><trkpt lat="68.28932650387287"
lon="15.344306230545044"/><trkpt lat="68.28936740756035"
lon="15.344408825039864"/><trkpt lat="68.28950621187687"
lon="15.344492308795452"/><trkpt lat="68.28967049717903"
lon="15.34478198736906"/><trkpt lat="68.28968357294798"
lon="15.344874858856201"/><trkpt lat="68.28990183770657"
lon="15.345310717821121"/><trkpt lat="68.2899434119463"
lon="15.345323793590069"/><trkpt lat="68.29014390707016"
lon="15.345307029783726"/><trkpt lat="68.29014625400305"
lon="15.345061272382736"/><trkpt lat="68.2899883389473"
lon="15.34440279006958"/><trkpt lat="68.28992631286383"
lon="15.34433238208294"/><trkpt lat="68.28987166285515"
lon="15.344371274113655"/><trkpt lat="68.28982003033161"
lon="15.34432265907526"/><trkpt lat="68.28984316438437"
lon="15.343849919736385"/><trkpt lat="68.28983914107084"
lon="15.34372452646494"/><trkpt lat="68.28973822295666"
lon="15.343248434364796"/><trkpt lat="68.28967921435833"
lon="15.343119017779827"/><trkpt lat="68.28962456434965"
lon="15.343111641705036"/><trkpt lat="68.28931979835033"
lon="15.343387238681316"/><trkpt lat="68.28928895294666"
lon="15.343495532870293"/><trkpt lat="68.28927520662546"
lon="15.343786887824535"/><trkpt lat="68.28927520662546"
lon="15.344434306025505"/><trkpt lat="68.28880414366722"
lon="15.344434306025505"/><trkpt lat="68.28898016363382"
lon="15.344303883612156"/><trkpt lat="68.28902877867222"
lon="15.344066508114338"/><trkpt lat="68.28900966793299"
lon="15.344004482030869"/><trkpt lat="68.28894764184952"
lon="15.343953520059586"/><trkpt lat="68.28882157802582"
lon="15.343929380178452"/><trkpt lat="68.28874412924051"
lon="15.343957543373108"/><trkpt lat="68.2886515930295"
lon="15.34404169768095"/><trkpt lat="68.28861102461815"
lon="15.344339087605476"/><trkpt lat="68.2886254414916"
lon="15.34441888332367"/><trkpt lat="68.28867137432098"
lon="15.344428941607475"/><trkpt lat="68.2887015491724"
lon="15.344382673501968"/><trkpt lat="68.28873474150896"
lon="15.344366580247879"/><trkpt lat="68.28880414366722"
lon="15.344434306025505"/><trkpt lat="68.28735206276178"
lon="15.344434306025505"/><trkpt lat="68.28735206276178"
lon="15.342336148023605"/><trkpt lat="68.28358925879002"
lon="15.342336148023605"/><trkpt lat="68.28358925879002"
lon="15.341153629124165"/><trkpt lat="68.28363720327616"
lon="15.341182127594948"/><trkpt lat="68.28365966677666"
lon="15.34116804599762"/><trkpt lat="68.28384038060904"
lon="15.34092128276825"/><trkpt lat="68.2838960364461"
lon="15.340819358825684"/><trkpt lat="68.2843241840601"
lon="15.340819358825684"/><trkpt lat="68.28428730368614"
lon="15.340912900865078"/><trkpt lat="68.28425779938698"
lon="15.341069139540195"/><trkpt lat="68.28424908220768"
lon="15.341156646609306"/><trkpt lat="68.28431848436594"
lon="15.341482535004616"/><trkpt lat="68.28434228897095"
lon="15.341549254953861"/><trkpt lat="68.28439693897963"
lon="15.341561995446682"/><trkpt lat="68.28444086015224"
lon="15.341210961341858"/><trkpt lat="68.28444387763739"
lon="15.341073833405972"/><trkpt lat="68.2844153791666"
lon="15.340959168970585"/><trkpt lat="68.28434966504574"
lon="15.340821370482445"/><trkpt lat="68.2843241840601"
lon="15.340819358825684"/><trkpt lat="68.28735206276178"
lon="15.340819358825684"/><trkpt lat="68.28735206276178"
lon="15.356483459472656"/></trkseg></trk></gpx>
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