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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>Hi Bernhard,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>I recently made a few new tests with an old release of phyghtmap (the release 1.47 tested §4.3 Windows Installation, see <a href="http://katze.tfiu.de/projects/phyghtmap/">http://katze.tfiu.de/projects/phyghtmap/</a>)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>A comparison between hgt2osm and phyghtmap (1.42) is given at this link:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><a href="https://drive.google.com/file/d/1loWwr6JE9wq1rORKWae7CNAqn0t3h62L/view?usp=sharing">https://drive.google.com/file/d/1loWwr6JE9wq1rORKWae7CNAqn0t3h62L/view?usp=sharing</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>We also can see cut contour lines only at 0°. But phyghtmap don't generate horizontal lines.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>IMHO I think that this little issue could be easily solved by Frank Stinner the developer of hgt2osm.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>I tried to send him an email about these "artefacts" near 0°, hopping the email addresses are correct and in usage.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>fstinner at gmx.de<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>frank.stinner at kabelmail.de<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>Gerard<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='margin-left:35.4pt'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:FR'>De :</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:FR'> mkgmap-dev [mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk] <b>De la part de</b> Bernhard Hiller<br><b>Envoyé :</b> vendredi 11 mars 2022 17:23<br><b>À :</b> mkgmap-dev@lists.mkgmap.org.uk<br><b>Objet :</b> Re: [mkgmap-dev] Contour lines with "Artefacts" near a vertical line situated at W0° 00' 00"<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-left:35.4pt'><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'>Hi Gerard,<br>you can check the elevation contour lines by opening the file generated by your tool in e.g. JOSM (my take some time when the file is large).<br>Strange distortions are expected at the borders of the whole set of input files, but not where input files are adjacent to each other.<br>Your description seems to hint to a bug when crossing the 0°-meridian. I do not know how srtm2osm reacts there, it might be worth to try it.<br><br>Kind regards,<br>Bernhard<o:p></o:p></p><div><p class=MsoNormal style='margin-left:35.4pt'>Am 10.03.2022 um 14:15 schrieb Gerard CATTIAUX:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Hello,</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>After many hours of time to get a correct knowledge of the most important tools needed to produce Garmin map, like mkmap, Splitter.. and plenty of hours to develop my own Styles files for mkgmap, I am now able to produce local maps mainly for Fenix 6x or Garmin 66, specifically for Trail Running.</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>That help me also to have a mean to verify immediately all my contributions to OSM database.</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>To have the best results for my personal maps, I use altitude data from Sonny. </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><a href="https://data.europa.eu/data/datasets/dtm-europe?locale=en"><span lang=EN-GB>https://data.europa.eu/data/datasets/dtm-europe?locale=en</span></a><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>For flat part of the country, I generally generate contour lines with a 5m space, in lieu of a 10m or 20m space between contours lines.</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>That choice seems for me a very good choice for as an example "Ile de France" (Extended Region around Paris), where max altitude are between 150 to 200m.</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>I recently generate contourlines near La Rochelle in France for a local zone called "Poitou-Charentes",</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><a href="http://download.geofabrik.de/europe/france/poitou-charentes.html"><span lang=EN-GB>http://download.geofabrik.de/europe/france/poitou-charentes.html</span></a><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>but unfortunately, I have artefacts, that I don't have for example in many other regions of France.</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>These artefacts are also visible for 5m, 10m and 20m space between contours lines.</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>These "artefacts" are described in the pdf files given at this link:</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><a href="https://drive.google.com/file/d/1uiA51R4Kd_WYsdeTrEtevu2jJ_8aPinH/view?usp=sharing"><span lang=EN-GB>https://drive.google.com/file/d/1uiA51R4Kd_WYsdeTrEtevu2jJ_8aPinH/view?usp=sharing</span></a><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>To generate my contour lines, I use mainly hgt2osm, with hgt files from Sonny.</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Hgt files in the example : </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>N46W002.zip</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>N46W001.zip</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>N46E000.zip</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>N45W002.zip</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>N45W001.zip</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>N45E000.zip</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Command line</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'>hgt2osm -g HGT-AFAIRE --MinorDistance=10<o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Hgt2Osm, 13.11.2017, FSofT</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>64 Bit-OS: ja</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Programmodus 64 Bit: ja</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>MinorDistance: 10</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>MediumFactor: 5</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>MajorFactor: 5</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'>HGT-Verzeichnis: HGT-AFAIRE<o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'>Mergefile:<o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>OutputOverwrite: False</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Höhenkorrektur: -0.5</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>MinVerticePoints: 3</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>MinBoundingbox: 0.0005</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Douglas-Peucker: 0.04</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>1. OSM-ID: -1</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>mit OSMBound: False</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>mit OSMBounds: True</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>mit OSMTimestamp: True</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'>mit OSMVersion: 1<o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'>mit OSMVisible: False<o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'>max. Punktanzahl je Weg: 500<o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>mit 'contour_ext'-Tag: True</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>At first sight, it seems that all these artefacts begin just near a vertical line situated at W0° 00' 00" / E0° 00' 00" </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Any ideas to helps me to solve the problem?</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Many thanks</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Regards</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB>Gerard Cattiaux</span><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><span lang=EN-GB> </span><o:p></o:p></p></blockquote><p class=MsoNormal style='margin-left:35.4pt'><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:FR'><o:p> </o:p></span></p></div></body></html>