Re: [GRASS-user] Identifying Why Vector Map Lables Do Not Display
On 27/05/12 23:43, Rich Shepard wrote: I've a vector map of areas created from the raster original using r.to.vect with the '-v' option. The vector map's attribute table has cat values which is sufficient for me to identify specific polygons. However, when displaying the map the lables do not appear despite the attr and cat options being selected. You have to display the centroids to be able to see labels, i.e. d.vect census_wake2000 display=shape,cat type=point,line,boundary,area,face will not display the cat values, while d.vect census_wake2000 display=shape,cat type=point,line,boundary,area,face,centroid will. No need to use attr if all you want to see are the categories of the features (unless your attribute table's cat column does not correspond to the category values of the features, but represents a separate attribute, then attr is needed, but cat not.) Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Identifying Why Vector Map Lables Do Not Display [FIXED]
On Tue, 29 May 2012, Moritz Lennert wrote: You have to display the centroids to be able to see labels, i.e. Moritz, You lead me to the solution. There is one default choice that must be maintained (the centroid checkbox on the Selections tab) and one non-default that needs to be selected: the the 'Display category number of features' on the Required tab. I had consistently left the centroids selected for display, but on the Required tab had checked the 'Display selected attribute from attrcol' box rather than the 'Display category number of features' box. Because the category numbers column appears on the Labels tab as a choice for display I interpreted it as an attribute column and missed the second-from-the-top choice on the Required tab. Thank you very much, Rich ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Identifying Why Vector Map Lables Do Not Display [FIXED]
On 29/05/12 14:58, Rich Shepard wrote: On Tue, 29 May 2012, Moritz Lennert wrote: You have to display the centroids to be able to see labels, i.e. Moritz, You lead me to the solution. There is one default choice that must be maintained (the centroid checkbox on the Selections tab) and one non-default that needs to be selected: the the 'Display category number of features' on the Required tab. I had consistently left the centroids selected for display, but on the Required tab had checked the 'Display selected attribute from attrcol' box rather than the 'Display category number of features' box. Because the category numbers column appears on the Labels tab as a choice for display I interpreted it as an attribute column and missed the second-from-the-top choice on the Required tab. Well, actually, it should work both ways, i.e. with the d.vect census_wake2000 display=shape,attr type=point,line,boundary,area,face,centroid attrcol=cat d.vect census_wake2000 display=shape,cat type=point,line,boundary,area,face,centroid should give the same result (assuming that all features that have a category value have a corresponding entry in the cat column of the attribute table). Note that in grass7.0 the use of centroids is not necessary anymore. Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Identifying Why Vector Map Lables Do Not Display
Hi Rich, I've had this problem before and for me it always seemed to be an issue of setting the size of labels correctly, which can be tricky sometimes, particularly if your location is latlong (if I remember correctly the size is in map units, so in that case you need to compute your desired label size as degrees). It's been a while since I've had to do this though, so I'm not 100% certain of this, but perhaps it will solve your problem. Best, Nick On Mon, May 28, 2012 at 4:43 AM, Rich Shepard rshep...@appl-ecosys.comwrote: I've a vector map of areas created from the raster original using r.to.vect with the '-v' option. The vector map's attribute table has cat values which is sufficient for me to identify specific polygons. However, when displaying the map the lables do not appear despite the attr and cat options being selected. What procedure will allow me to identify why the labels don't display so I can fix the problem? Rich __**_ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/**mailman/listinfo/grass-userhttp://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Identifying Why Vector Map Lables Do Not Display
On Mon, 28 May 2012, Nick Jachowski wrote: I've had this problem before and for me it always seemed to be an issue of setting the size of labels correctly, which can be tricky sometimes, particularly if your location is latlong (if I remember correctly the size is in map units, so in that case you need to compute your desired label size as degrees). It's been a while since I've had to do this though, so I'm not 100% certain of this, but perhaps it will solve your problem. Nick, It is a reasonable suggestion, but not the solution here. I raised the label size from the default 8 pixels to 20 pixels, then 40 pixels, but there was still no display. I'm still open to suggestions, recommendations, and solutions. Thanks, Rich -- Richard B. Shepard, Ph.D. | Integrity - Credibility - Innovation Applied Ecosystem Services, Inc. |Helping Ensure Our Clients' Futures http://www.appl-ecosys.com Voice: 503-667-4517 Fax: 503-667-8863 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Identifying Why Vector Map Lables Do Not Display
I've a vector map of areas created from the raster original using r.to.vect with the '-v' option. The vector map's attribute table has cat values which is sufficient for me to identify specific polygons. However, when displaying the map the lables do not appear despite the attr and cat options being selected. What procedure will allow me to identify why the labels don't display so I can fix the problem? Rich ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
