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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">Hi Dmitry,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">thank you for you response. There is a way to do the step 2 using GDAL?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">Moreover, if the path lengths are not multiple of the split size (e.g. 1000m), how the last segment is handled?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">Nicola<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:windowtext;mso-fareast-language:IT">Da:</span></b><span style="color:windowtext;mso-fareast-language:IT"> gdal-dev [mailto:gdal-dev-bounces@lists.osgeo.org]
<b>Per conto di </b>Dmitry Baryshnikov<br>
<b>Inviato:</b> martedì 7 giugno 2016 16:16<br>
<b>A:</b> gdal-dev@lists.osgeo.org<br>
<b>Oggetto:</b> Re: [gdal-dev] Problem using ogrlineref<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi Nicola,<br>
<br>
The idea of ogrlineref was follow:<br>
1. You have layer with some lines and some reper points with known linear coordinates<br>
2. The reper points divide lines on equal parts (e.i. 1000 m) - this is important that parts should be equal<br>
3. The result file will have special structure (required fields: beg, end, scale, and some optional)<br>
4. During referencing ogrlineref make attribute query and get needed part based on beg and end fields (which is rather fast), and than calc point position inside this part.<br>
<br>
In your case, the simple way is to extract begin and end point of your lines and make them reper points. After that all steps are usual.
<br>
<br>
There is no sense to move other fields into the parts file from your original datasource. But you can use -lf option to store some value and use it in future for join with your original data.<br>
<br>
<span style="font-size:12.0pt;mso-fareast-language:IT"><o:p></o:p></span></p>
<pre>Best regards,<o:p></o:p></pre>
<pre> Dmitry<o:p></o:p></pre>
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<p class="MsoNormal">07.06.2016 15:19, Nicola Baraldo (ICONSULTING) пишет:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Hi guys,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">I am trying to split some routes into segments of the same length (dynamic segmentation) using ogrlineref command.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">My data is stored in a shapefile containing a set of paths, for each path I know the length in meters.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">I have tried ogrlineref with –create, –get_coord and - get_subline.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">For the first option I don’t have a reper datasource to provide because I don’t have mile-stones, are they really necessaries?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">The second and third options give me the following error for each path contained in the input shapefile; with –get_coord I have tried both options “–m 0” and “–m
1000”, with –get_subline I have tried “-mb 0 -me 1” options.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:IT"><br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;mso-fareast-language:IT">Can someone help me using this command? Is there a better way to perform dynamic segmentation using GDAL?</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:IT">
</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:IT"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Moreover my shapefile contains also a lot of other fields, there is a way to keep these information also in the output file?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Nicola</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:IT"><br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>gdal-dev mailing list<o:p></o:p></pre>
<pre><a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a><o:p></o:p></pre>
<pre><a href="http://lists.osgeo.org/mailman/listinfo/gdal-dev">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a><o:p></o:p></pre>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:IT"><o:p> </o:p></span></p>
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