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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-GB>Hello,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><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.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>That help me also to have a mean to verify immediately all my contributions to OSM database.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>To have the best results for my personal maps, I use altitude data from Sonny. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><a href="https://data.europa.eu/data/datasets/dtm-europe?locale=en">https://data.europa.eu/data/datasets/dtm-europe?locale=en</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><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.<o:p></o:p></span></p><p class=MsoNormal><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.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I recently generate contourlines near La Rochelle in France for a local zone called "Poitou-Charentes",<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><a href="http://download.geofabrik.de/europe/france/poitou-charentes.html">http://download.geofabrik.de/europe/france/poitou-charentes.html</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>but unfortunately, I have artefacts, that I don't have for example in many other regions of France.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>These artefacts are also visible for 5m, 10m and 20m space between contours lines.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>These "artefacts" are described in the pdf files given at this link:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><a href="https://drive.google.com/file/d/1uiA51R4Kd_WYsdeTrEtevu2jJ_8aPinH/view?usp=sharing">https://drive.google.com/file/d/1uiA51R4Kd_WYsdeTrEtevu2jJ_8aPinH/view?usp=sharing</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>To generate my contour lines, I use mainly hgt2osm, with hgt files from Sonny.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Hgt files in the example : <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>N46W002.zip<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>N46W001.zip<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>N46E000.zip<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>N45W002.zip<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>N45W001.zip<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>N45E000.zip<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Command line<o:p></o:p></span></p><p class=MsoNormal>hgt2osm -g HGT-AFAIRE --MinorDistance=10<o:p></o:p></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Hgt2Osm, 13.11.2017, FSofT<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>64 Bit-OS: ja<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Programmodus 64 Bit: ja<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>MinorDistance: 10<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>MediumFactor: 5<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>MajorFactor: 5<o:p></o:p></span></p><p class=MsoNormal>HGT-Verzeichnis: HGT-AFAIRE<o:p></o:p></p><p class=MsoNormal>Mergefile:<o:p></o:p></p><p class=MsoNormal><span lang=EN-GB>OutputOverwrite: False<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Höhenkorrektur: -0.5<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>MinVerticePoints: 3<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>MinBoundingbox: 0.0005<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Douglas-Peucker: 0.04<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>1. OSM-ID: -1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>mit OSMBound: False<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>mit OSMBounds: True<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>mit OSMTimestamp: True<o:p></o:p></span></p><p class=MsoNormal>mit OSMVersion: 1<o:p></o:p></p><p class=MsoNormal>mit OSMVisible: False<o:p></o:p></p><p class=MsoNormal>max. Punktanzahl je Weg: 500<o:p></o:p></p><p class=MsoNormal><span lang=EN-GB>mit 'contour_ext'-Tag: True<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><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" <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Any ideas to helps me to solve the problem?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Many thanks<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Gerard Cattiaux<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p></div></body></html>