<div dir="ltr"><div>Hi,</div><div>I'm trying to extract the outlet location from the </div><div>r.stream.extract stream_vector=stream attribute. <br></div><div>In particular the manual for r.stream.extract reports:</div><div><br></div><div>"In layer 2, categories are identical to type_code in layer 1 with additional category 2 = outlet for outlet points."</div><div><br></div><div>I want to be able to extract only the points of layer 2 where category = 2. <br></div><div>However when I run </div><br clear="all"><div>v.db.connect  -p  map=stream  <br>Vector map <stream> is connected by:<br>layer <1/stream> table <stream> in database </tmp/grass7-ga254-12721/tmploc/PERMANENT/sqlite/sqlite.db> through driver <sqlite> with key <cat><br></div><div><br></div><div>I can see only layer 1 (which does not contain category 2). </div><div><br></div><div>Is there a way to connect to layer 2?</div><div>How I can be sure that also layer 2 has been created and is not missing?</div><div>Thanks <br></div><div>Giuseppe </div><div><br></div><div>GRASS 7.6.0 (tmploc):/gpfs/scratch60/fas/sbsc/ga254/dataproces/MERIT_HYDRO > <a href="http://v.info">v.info</a>  map=stream <br> +----------------------------------------------------------------------------+<br> | Name:       stream                           |<br> | Mapset:      PERMANENT                         |<br> | Location:     tmploc                           |<br> | Database:     /tmp/grass7-ga254-25033                  |<br> | Title:                                   |<br> | Map scale:    1:1                            |<br> | Name of creator: ga254                           |<br> | Organization:                                |<br> | Source date:   Thu Apr 23 14:42:51 2020                  |<br> | Timestamp (first layer): none                        |<br> |----------------------------------------------------------------------------|<br> | Map format:    native                           |<br> |----------------------------------------------------------------------------|<br> |  Type of map: vector (level: 2)                      |<br> |                                       |<br> |  Number of points:    250905      Number of centroids:  0      |<br> |  Number of lines:     245570      Number of boundaries: 0      |<br> |  Number of areas:     0        Number of islands:   0      |<br> |                                       |<br> |  Map is 3D:        No                        |<br> |  Number of dblinks:    1                         |<br> |                                       |<br> |  Projection: Latitude-Longitude                      |<br> |                                       |<br> |        N:    77:06:40.5N   S:    73:10:55.5N         |<br> |        E:    158:07:46.5E   W:    135:26:34.5E         |<br> |                                       |<br> |  Digitization threshold: 0                         |<br> |  Comment:                                 |<br> |                                       |<br> +----------------------------------------------------------------------------+<br><br></div><div><br></div><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>Giuseppe Amatulli, Ph.D.<br><br>Research scientist at<br><span>School of Forestry & Environmental Studies<br></span><span>Center for Research Computing</span><br>Yale University</div><div>New Haven, CT, USA</div><div>06511<br><div>
Teaching: <a href="http://spatial-ecology.net" target="_blank">http://spatial-ecology.net</a></div>
Work:Â <a href="https://environment.yale.edu/profile/giuseppe-amatulli/" target="_blank">https://environment.yale.edu/profile/giuseppe-amatulli/</a> <br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>