<div dir="ltr"><div>Hi Luis,</div><div><br></div><div>could be because you haven't provided the attribute column. It should probably fail with a message in this case...</div><div><br></div>Anna<div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 16, 2021 at 5:08 AM Luís Moreira de Sousa via grass-user <<a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>Hi all,<br></div><div><br></div><div>I have been trying to use v.surf.idw the past few days without success.<br></div><div><br></div><div>The image attached is a screen capture from the Map Display. There is a category<br></div><div>raster (green regions) with a gap (lake Chad) that must be filled with the<br></div><div>nearest neighbour category. The strategy is to create a points vector from the raster<br></div><div>and then apply v.surf.idw with npoints=1.<br></div><div><br></div><div>If the density of points is too high (> 10 000) the module fails with the<br></div><div>message "Killed". With fewer points the module fails with the message<br></div><div>"ERROR: No points found". Below is a log with an example. I have<br></div><div>tried many different combinations of resolution and number of points, I also tried different mapsets, SQLite and Postgres back-ends, but the result is always the same.<br></div><div><br></div><div>What can be going wrong?<br></div><div><br></div><div>P.S.: there is previous thread with similar symptoms, but seems to have been a different issue: <a href="http://osgeo-org.1560.x6.nabble.com/v-surf-idw-Not-Working-td5457170.html" target="_blank">http://osgeo-org.1560.x6.nabble.com/v-surf-idw-Not-Working-td5457170.html</a><br></div><div><br></div><div>Thank you.<br></div><div><br></div><div>Luís<br></div><div><br></div><div>GRASS 7.8.2 (S4AHomolosine):~ > g.region nsres=20000 ewres=20000 w=1474000 n=1626000 e=1760000 s=1383000<br></div><div>GRASS 7.8.2 (S4AHomolosine):~ > r.to.vect type=point input=soil_map_rcl_no_water output=soil_map_rcl_no_water --overwrite<br></div><div>WARNING: Vector map <soil_map_rcl_no_water> already exists and will be<br></div><div> overwritten<br></div><div>Extracting points...<br></div><div>100%<br></div><div>Building topology for vector map <soil_map_rcl_no_water@MAL>...<br></div><div>Registering primitives...<br></div><div>r.to.vect complete.<br></div><div>GRASS 7.8.2 (S4AHomolosine):~ > <a href="http://v.info" target="_blank">v.info</a> soil_map_rcl_no_water<br></div><div>+----------------------------------------------------------------------------+<br></div><div>| Name: soil_map_rcl_no_water |<br></div><div>| Mapset: MAL |<br></div><div>| Location: S4AHomolosine |<br></div><div>| Database: /home/duque004/Work/GRASSDATA |<br></div><div>| Title: |<br></div><div>| Map scale: 1:1 |<br></div><div>| Name of creator: duque004 |<br></div><div>| Organization: |<br></div><div>| Source date: Fri Apr 16 10:10:31 2021 |<br></div><div>| Timestamp (first layer): none |<br></div><div>|----------------------------------------------------------------------------|<br></div><div>| Map format: native |<br></div><div>|----------------------------------------------------------------------------|<br></div><div>| Type of map: vector (level: 2) |<br></div><div>| |<br></div><div>| Number of points: 114 Number of centroids: 0 |<br></div><div>| Number of lines: 0 Number of boundaries: 0 |<br></div><div>| Number of areas: 0 Number of islands: 0 |<br></div><div>| |<br></div><div>| Map is 3D: No |<br></div><div>| Number of dblinks: 1 |<br></div><div>| |<br></div><div>| Projection: unknown |<br></div><div>| |<br></div><div>| N: 1615875 S: 1393125 |<br></div><div>| E: 1749785.71428571 W: 1484214.28571429 |<br></div><div>| |<br></div><div>| Digitization threshold: 0 |<br></div><div>| Comment: |<br></div><div>| |<br></div><div>+----------------------------------------------------------------------------+<br></div><div><br></div><div>GRASS 7.8.2 (S4AHomolosine):~ > g.region nsres=100 ewres=100 w=1474000 n=1626000 e=1760000 s=1383000<br></div><div>GRASS 7.8.2 (S4AHomolosine):~ > v.surf.idw npoints=1 input=soil_map_rcl_no_water output=soil_map_rcl_water_fill --overwrite<br></div><div>Input vector map <soil_map_rcl_no_water@MAL> is 2D - using categories to<br></div><div>interpolate<br></div><div>WARNING: No record for point (cat = 1)<br></div><div>WARNING: No record for point (cat = 2)<br></div><div>WARNING: No record for point (cat = 3)<br></div><div>WARNING: No record for point (cat = 4)<br></div><div>WARNING: No record for point (cat = 5)<br></div><div>WARNING: No record for point (cat = 6)<br></div><div>WARNING: No record for point (cat = 7)<br></div><div>WARNING: No record for point (cat = 8)<br></div><div>WARNING: No record for point (cat = 9)<br></div><div>WARNING: No record for point (cat = 10)<br></div><div>WARNING: No record for point (cat = 11)<br></div><div>WARNING: No record for point (cat = 12)<br></div><div>WARNING: No record for point (cat = 13)<br></div><div>WARNING: No record for point (cat = 14)<br></div><div>WARNING: No record for point (cat = 15)<br></div><div>WARNING: No record for point (cat = 16)<br></div><div>WARNING: No record for point (cat = 17)<br></div><div>WARNING: No record for point (cat = 18)<br></div><div>WARNING: No record for point (cat = 19)<br></div><div>WARNING: No record for point (cat = 20)<br></div><div>WARNING: No record for point (cat = 21)<br></div><div>WARNING: No record for point (cat = 22)<br></div><div>WARNING: No record for point (cat = 23)<br></div><div>WARNING: No record for point (cat = 24)<br></div><div>WARNING: No record for point (cat = 25)<br></div><div>WARNING: No record for point (cat = 26)<br></div><div>WARNING: No record for point (cat = 27)<br></div><div>WARNING: No record for point (cat = 28)<br></div><div>WARNING: No record for point (cat = 29)<br></div><div>WARNING: No record for point (cat = 30)<br></div><div>WARNING: No record for point (cat = 31)<br></div><div>WARNING: No record for point (cat = 32)<br></div><div>WARNING: No record for point (cat = 33)<br></div><div>WARNING: No record for point (cat = 34)<br></div><div>WARNING: No record for point (cat = 35)<br></div><div>WARNING: No record for point (cat = 36)<br></div><div>WARNING: No record for point (cat = 37)<br></div><div>WARNING: No record for point (cat = 38)<br></div><div>WARNING: No record for point (cat = 39)<br></div><div>WARNING: No record for point (cat = 40)<br></div><div>WARNING: No record for point (cat = 41)<br></div><div>WARNING: No record for point (cat = 42)<br></div><div>WARNING: No record for point (cat = 43)<br></div><div>WARNING: No record for point (cat = 44)<br></div><div>WARNING: No record for point (cat = 45)<br></div><div>WARNING: No record for point (cat = 46)<br></div><div>WARNING: No record for point (cat = 47)<br></div><div>WARNING: No record for point (cat = 48)<br></div><div>WARNING: No record for point (cat = 49)<br></div><div>WARNING: No record for point (cat = 50)<br></div><div>WARNING: No record for point (cat = 51)<br></div><div>WARNING: No record for point (cat = 52)<br></div><div>WARNING: No record for point (cat = 53)<br></div><div>WARNING: No record for point (cat = 54)<br></div><div>WARNING: No record for point (cat = 55)<br></div><div>WARNING: No record for point (cat = 56)<br></div><div>WARNING: No record for point (cat = 57)<br></div><div>WARNING: No record for point (cat = 58)<br></div><div>WARNING: No record for point (cat = 59)<br></div><div>WARNING: No record for point (cat = 60)<br></div><div>WARNING: No record for point (cat = 61)<br></div><div>WARNING: No record for point (cat = 62)<br></div><div>WARNING: No record for point (cat = 63)<br></div><div>WARNING: No record for point (cat = 64)<br></div><div>WARNING: No record for point (cat = 65)<br></div><div>WARNING: No record for point (cat = 66)<br></div><div>WARNING: No record for point (cat = 67)<br></div><div>WARNING: No record for point (cat = 68)<br></div><div>WARNING: No record for point (cat = 69)<br></div><div>WARNING: No record for point (cat = 70)<br></div><div>WARNING: No record for point (cat = 71)<br></div><div>WARNING: No record for point (cat = 72)<br></div><div>WARNING: No record for point (cat = 73)<br></div><div>WARNING: No record for point (cat = 74)<br></div><div>WARNING: No record for point (cat = 75)<br></div><div>WARNING: No record for point (cat = 76)<br></div><div>WARNING: No record for point (cat = 77)<br></div><div>WARNING: No record for point (cat = 78)<br></div><div>WARNING: No record for point (cat = 79)<br></div><div>WARNING: No record for point (cat = 80)<br></div><div>WARNING: No record for point (cat = 81)<br></div><div>WARNING: No record for point (cat = 82)<br></div><div>WARNING: No record for point (cat = 83)<br></div><div>WARNING: No record for point (cat = 84)<br></div><div>WARNING: No record for point (cat = 85)<br></div><div>WARNING: No record for point (cat = 86)<br></div><div>WARNING: No record for point (cat = 87)<br></div><div>WARNING: No record for point (cat = 88)<br></div><div>WARNING: No record for point (cat = 89)<br></div><div>WARNING: No record for point (cat = 90)<br></div><div>WARNING: No record for point (cat = 91)<br></div><div>WARNING: No record for point (cat = 92)<br></div><div>WARNING: No record for point (cat = 93)<br></div><div>WARNING: No record for point (cat = 94)<br></div><div>WARNING: No record for point (cat = 95)<br></div><div>WARNING: No record for point (cat = 96)<br></div><div>WARNING: No record for point (cat = 97)<br></div><div>WARNING: No record for point (cat = 98)<br></div><div>WARNING: No record for point (cat = 99)<br></div><div>WARNING: No record for point (cat = 100)<br></div><div>WARNING: No record for point (cat = 101)<br></div><div>WARNING: No record for point (cat = 102)<br></div><div>WARNING: No record for point (cat = 103)<br></div><div>WARNING: No record for point (cat = 104)<br></div><div>WARNING: No record for point (cat = 105)<br></div><div>WARNING: No record for point (cat = 106)<br></div><div>WARNING: No record for point (cat = 107)<br></div><div>WARNING: No record for point (cat = 108)<br></div><div>WARNING: No record for point (cat = 109)<br></div><div>WARNING: No record for point (cat = 110)<br></div><div>WARNING: No record for point (cat = 111)<br></div><div>WARNING: No record for point (cat = 112)<br></div><div>WARNING: No record for point (cat = 113)<br></div><div>WARNING: No record for point (cat = 114)<br></div><div>0 points loaded<br></div><div>ERROR: No points found<br></div><div><br></div><div><br></div><div><div><div><br></div><div>-- <br></div><div>Luís<br></div><div><br></div></div><div>Sent with <a href="https://protonmail.com" target="_blank">ProtonMail</a> Secure Email.<br></div></div><div><br></div>_______________________________________________<br>
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</blockquote></div></div></div>