Re: [Qgis-user] Raster selection
Jose Maria, If your layer in question is vector layer why is the subject of your message Raster selection? I suggest: 1. Define a rectangle for your area of interest and save it as a vector layer. Use New Layer (be sure to define the layer as polygon), Toggle Editing on and Capture rectangle to define your rectangle. Toggle Editing off and save. 2. Use ftools/Geoprocessing tools/Clip It's clear that QGIS lacks 2 simple but critical tools on these issues: 1. A simpler way to define a rectangular polygon for a given area. Currently, it's hard to get a real rectangle by defining a polygon with 4 points. Also, a tool just saving as a rectangle the currently displayed extent would be most practical (and perhaps also another defining a rectangle from the extent of a given object, which would be required to display the extent of geographical objects out of their metadata anyway). 2. Clipping raster layers. You mention that you use grass. Note that through the grass plugin you can also solve these problems with grass (although I don't like the fact that you have to go through the location definition and the import/export from/to grass; we should be able to solve these problems within qgis itself). If you have problems to communicate in English, you are welcome to write me in Spanish. Regards, Agus -- Message: 8 Date: Fri, 21 Nov 2008 01:30:16 -0300 From: Jos? Mar?a Michia [EMAIL PROTECTED] Subject: Re: [Qgis-user] Raster selection To: Sergio Z?rate Pedroche [EMAIL PROTECTED] Cc: Qgis-user@lists.osgeo.org Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=ISO-8859-1 Thanks Sergio, but it's not what I'm looking to do. I'm difficult with english, and i can not explain precisely. The layer in question is vector layer, not raster. More exactly, is an LABEL/ANNOTATION layer. And to be more exact, I wish this layer processed by MapServer for generalize at certain scale. My previous post is about some alternatives that I've explored explored in QGIS. The raster extraction mentioned, is not useful for me in this case. 2008/11/21 Sergio Zárate Pedroche [EMAIL PROTECTED]: Hi, José María, Have you tried MultiSpec? It allows for establishing a rectangle selection, either manually or by coordinates (rows, cols; degrees or meters) and then saving selection. I vave found it usefull for importing raster selections in QGis Yes, I tried MultiSpec. However, I am a Linux user, and I prefer to use gdal_translate and GRASS for handling raster files. Thank you very much Sergio José María -- Dr. Agustin Lobo Institut de Ciencies de la Terra Jaume Almera (CSIC) LLuis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 email: [EMAIL PROTECTED] http://www.ija.csic.es/gt/obster ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS segmentation fault
Friday 21 of November 2008 07:36:15 Gavin Fleming napisał(a): Hi Ubuntu server 7.10. QGIS worked until I did an apt-get update some time back. It was using standard repositories plus the launchpad/timlinux one. Yesterday I added launchpad/qgis to my apt sources and tried a new install but I still get this, I'm not even sure what version it's attempting to run. The splash screen was coming up in earlier versions of this crash but now that's not even happening: qgis Warning: No valid projection. Unable to set map units. Warning: No valid projection. Unable to set map units. Warning: No valid projection. Unable to set map units. Segmentation fault Here are the simplest solutions, sometimes help: Try to remove (or better rename or move anywhere to not lost your settings) the configuration file: ~/.config/QuantumGIS/qgis.conf If it doesn't help, the problem may be caused by an incompatible C++ plugin. Have you compiled any for older version by youself? If so, try to (re)move it and recompile. Python plugins shouldn't give such error, but to be sure, you can remove or rename the ~/.qgis/python/plugins directory Btw. The warning message you've reported appears frequently in some qgis versions and probably isn't related to the subsequent segfault. Regards, B. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] select elements from a wms layer
Hi, Not sure if I understand you correctly, but a WFS SHOULD be selectable in QGIS. Try the 'rijkswaterstaat'-url below, and you can select 1 province, and via the attribute table copy WKT to the clipboard: wkt_geom,MPPerimete,MPArea,AREA,PERIMETER,OMSCHR,GAQ,NL MULTIPOLYGON(((149480.042914 476598.605781,149482.755927 ... a LOT of coordinates here ... 476598.605781))),265264,143640,1436408320.,265278.25000,Utrecht,10,0 But if it is only the LABELS that you actually want to copy, it's different. Labelplacement is done using the geographic object it's attached to. First I thought that you maybe could transform your original layer to a point-layer, but in that way you do not have the exact same label locations as before. But having a pointlayer with labels, they should be selectable, thereby copyable. Another option?? in arcview it was/is(?) possible to transform a labels to a 'graphic'... Regards, Richard Duivenvoorde José María Michia wrote: With WFS I've come close to what I need. The problem is that WFS does not work with layers of labels. I've changed the geometry type, to polygon, without style, and with label, and i can display this layer in QGIS. I've inserted this WFS layer in QGIS. And, at certain scale, QGIS show only the labels that i want to write out. So, QGIS display the data that i wish to write to some GIS file. But, QGIS not let me select elementos from WFS/WMS layers. Selection tools is deactivated. And i cannot found any way of convert to gis format. Only found a way to convert it to image. Using QGIS, with both WMS and WFS layers, the selection tool is deactivated. I can not select elements of these layers. With other layer formats, the tool is activated, and I can select elements. Is correct this behavior? If you want to try out a WFS: use this url: http://www.rijkswaterstaat.nl/services/geoservices/overzichtskaartnl?service=WFStypename=NL-provversion=1.0.0 you will be able to receive provinces, highways etc from the Netherlands. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Raster Map tips?
Is there any other way to check pixel values other than the Identify Features tool? (plugin Value Tool does not work since 0.11, I think) Agus -- Dr. Agustin Lobo Institut de Ciencies de la Terra Jaume Almera (CSIC) LLuis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 email: [EMAIL PROTECTED] http://www.ija.csic.es/gt/obster ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Problem with grass plugin: r.statistics
I select 2 layers in the raster plugin menu for r.statistics but according to what is written to the output tab, the layers that are actually used are different: r.statistics [EMAIL PROTECTED] [EMAIL PROTECTED] method=median output=delme2 while I actually have selected [EMAIL PROTECTED] as base in the menu (see http://aloboaleu.googlepages.com/r.statistics1.jpg and http://aloboaleu.googlepages.com/r.statistics2.jpg ) Anyway, r.statistics does not work even from the command line. In: r.statistics [EMAIL PROTECTED] [EMAIL PROTECTED] method=median output=delme2 delme2 is identical to NDVI2003 (but this second one is for the grass list, actually). Agus -- Dr. Agustin Lobo Institut de Ciencies de la Terra Jaume Almera (CSIC) LLuis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 email: [EMAIL PROTECTED] http://www.ija.csic.es/gt/obster ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Re: [Qgis-developer] Getting some newbie views
Developers, I just wanted to add a comment to Barry's summary of the course: 1) Under layer properties General, we have the option to Chance CRS. I think this terminology is potentially misleading for one primary reason: When a newbie sees this button, they immediately think, Ah, what a handy way to (re) project my data! In reality, it doesn't 'change' the coordinates themselves al all, just the specification of the CRS. I propose ( for a 1.1 release of course ;-) ) that this be changed to something like Define CRS, Specify CRS, or change the abreviation of CRS to the full 'Coordinate Reference System. As is, it insinuates more of a change than is actually going on. As I'm sure many lecturers and tutors will agree, one of the biggest problems when teaching GIS to beginners comes from problems properly defining a layers CRS. I realise that this is a bit of a silly thing to worry about, but I just wanted to hear what other people though about this terminology. Cheers, Carson ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Spread of colors in Continuous Color
I don't quite understand the way colors are distributed among values between the color set for the min and the color set for the max value (Properties/Symbology/Continuous colors). I'm used to set the entire color ramp, not just the extreme colors. Also, does anyone have rules for Which couple of colors can be selected for best results in different situations? Thanks Agus -- Dr. Agustin Lobo Institut de Ciencies de la Terra Jaume Almera (CSIC) LLuis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 email: [EMAIL PROTECTED] http://www.ija.csic.es/gt/obster ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Bug about custom CRS
Hi all, I'm testing QGIS 0.10 on Debian and I see a bug about manage of the custom CRS. In the past version I had a custom projection like this: +proj=tmerc +lat_0=0 +lon_0=9 +k=0.9996 +x_0=150 +y_0=0 +ellps=intl +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68 +units=m +no_defs and I used this like default CRS for the geographical data without projection file and to reproject on the fly data from an another proiection system with good result. In the test vers 1.0 I have this problem: 1) if I set this custom projection like default projection the data is associated with WGS84 lat long projection 2) if I use this custom projection to make reprojection on the fly, QGIS automatically use CRS 3003 (EPSG code) instead of my custom projection with relative errors of projection. Anyone have similar bugs or know why it happens? Thank you very much Leonardo ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] internal sqlite3
Greets: Going through the build source and ccmake there is a setting for with internal sqlite3. Was wondering what sqlite is used for and its default seting is to off. -- /ch ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS segmentation fault
Hi Gavin On Fri, 2008-11-21 at 08:36 +0200, Gavin Fleming wrote: Hi Ubuntu server 7.10. QGIS worked until I did an apt-get update some time back. It was using standard repositories plus the launchpad/timlinux one. Yesterday I added launchpad/qgis to my apt sources and tried a new install but I still get this, I’m not even sure what version it’s attempting to run. The splash screen was coming up in earlier versions of this crash but now that’s not even happening: Try purging all QGIS related packages and uninstalling any hand built QGIS you may have, and then installing the launchpad/jef packages listed on http://download.qgis.org for heron. That will get you 1.0 preview 2 which is IMHO more stable than 0.11 anyway. Buzz if you still cant come right. Regards Tim qgis Warning: No valid projection. Unable to set map units. Warning: No valid projection. Unable to set map units. Warning: No valid projection. Unable to set map units. Segmentation fault Any tips? Gavin This message is intended for the addressee only. Information and attachments in this e-mail may contain confidential, proprietary, or legally privileged information. If you are not the intended recipient, or responsible for delivery of the message to the intended recipient, any disclosure, copying, distribution, or any action taken is prohibited and may be unlawful, and could result in a claim against you. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Tim Sutton - QGIS Project Steering Committee Member (Release Manager) == Visit http://linfiniti.com to find out about: * QGIS programming services * Mapserver and PostGIS based hosting plans * FOSS Consulting Support Services Skype: timlinux Irc: timlinux on #qgis at freenode.net == signature.asc Description: This is a digitally signed message part ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] internal sqlite3
Hi Chris On Fri, 2008-11-21 at 13:03 -0500, Chris h wrote: Greets: Going through the build source and ccmake there is a setting for with internal sqlite3. Was wondering what sqlite is used for and its default seting is to off. Sqlite is used to store the CRS database, user CRS database, spatial bookmarks, QML for databases and in the future probably more. The default setting is off since typically folks will link to sqlite installed via package manager. I added it as an 'internal' option for those not willing / able to install sqlite library separately on their system. There were other reasons for adding it which you can probably pick up from my initial commit messages when I added it (if you are interested for further info). Regards Tim -- Tim Sutton - QGIS Project Steering Committee Member (Release Manager) == Visit http://linfiniti.com to find out about: * QGIS programming services * Mapserver and PostGIS based hosting plans * FOSS Consulting Support Services Skype: timlinux Irc: timlinux on #qgis at freenode.net == signature.asc Description: This is a digitally signed message part ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Re: [Qgis-developer] Getting some newbie views
Hi On Fri, 2008-11-21 at 15:44 +, stefaan dondeyne wrote: Hi developers, I have been teaching qGIS over the last six months for introducing GIS to government staff in Mozambique and I cannot agree more with Carson point !!! So yes please take that suggestion into account. As always file tickets in trac. These suggestions are great but we cant implement them until after 1.0 release. Keeping them in trac will ensure they dont get lost. Since they are trivial to implement and add a lot to usability, it will be a pleasure to implement these changes in the next iteration. 8--snip Regards -- Tim Sutton - QGIS Project Steering Committee Member (Release Manager) == Visit http://linfiniti.com to find out about: * QGIS programming services * Mapserver and PostGIS based hosting plans * FOSS Consulting Support Services Skype: timlinux Irc: timlinux on #qgis at freenode.net == signature.asc Description: This is a digitally signed message part ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Raster selection
2008/11/21 Agustin Lobo [EMAIL PROTECTED]: Jose Maria, If your layer in question is vector layer why is the subject of your message Raster selection? I think that the message with subject Raster selection is a message from Sergio , not my. This message, I think, is product of the interest of Sergio in my problem, and a product of a confusion about the problem. I'm poor English writer, my apologies for imprecise on describe them. Subject of the original message, from my, is select elements from a wms layer. In this thread, Richard tell me, that the output from WMS, is a flat image. When I answered the message from Richard, I explained that I did not know that, so, WMS is not what I need. I suggest: 1. Define a rectangle for your area of interest and save it as a vector layer. Use New Layer (be sure to define the layer as polygon), Toggle Editing on and Capture rectangle to define your rectangle. Toggle Editing off and save. 2. Use ftools/Geoprocessing tools/Clip It's clear that QGIS lacks 2 simple but critical tools on these issues: 1. A simpler way to define a rectangular polygon for a given area. Currently, it's hard to get a real rectangle by defining a polygon with 4 points. Also, a tool just saving as a rectangle the currently displayed extent would be most practical (and perhaps also another defining a rectangle from the extent of a given object, which would be required to display the extent of geographical objects out of their metadata anyway). 2. Clipping raster layers. You mention that you use grass. Note that through the grass plugin you can also solve these problems with grass (although I don't like the fact that you have to go through the location definition and the import/export from/to grass; we should be able to solve these problems within qgis itself). If you have problems to communicate in English, you are welcome to write me in Spanish. Regards, Agus Creo que estos consejos van a ser muy útiles para hacer alguna prueba más. Habitualmente, cuando se trata de capas normales, comunes, no tengo problemas con esta clase de tareas. Pero en este caso, la capa que quiero procesar, además de ser una capa WFS, quiero obtenerla con la generalización que MapServer realiza sobre los elementos de la capa, a una escala determinada. Mi objetivo final es reutilizar el sistema de etiquetado que realiza MapServer con otros programas. QGIS lo hace muy bien, porque puedo agregar capas de tipo WFS, y la visualiza con generalizada, tal como la visualiza MapServer. Pero con GMT, no puedo leer esa capa WFS, necesito capturar los datos de alguna manera. Hasta ahora, he integrado los resultados al final del proceso de creación del mapa, integrando archivos PS y PDF. Pero quería encontrar una mejor forma de integrar esas etiquetas en GMT. La forma óptima de realizar esta tarea, se muy bien que esta lejos de mis intentos. Habría que aplicar un algoritmo de etiquetado sobre los datos originales. Pero eso también parece mucho más dificil, por eso quería buscar una forma rápida de utilizar las etiquetas que genera MapServer. Insisto: QGIS las muestra muy bien, pero quiero utilizarlas en otros programas. Gracias a todos por su ayuda. (Thanks all for your help). -- Message: 8 Date: Fri, 21 Nov 2008 01:30:16 -0300 From: Jos? Mar?a Michia [EMAIL PROTECTED] Subject: Re: [Qgis-user] Raster selection To: Sergio Z?rate Pedroche [EMAIL PROTECTED] Cc: Qgis-user@lists.osgeo.org Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=ISO-8859-1 Thanks Sergio, but it's not what I'm looking to do. I'm difficult with english, and i can not explain precisely. The layer in question is vector layer, not raster. More exactly, is an LABEL/ANNOTATION layer. And to be more exact, I wish this layer processed by MapServer for generalize at certain scale. My previous post is about some alternatives that I've explored explored in QGIS. The raster extraction mentioned, is not useful for me in this case. 2008/11/21 Sergio Zárate Pedroche [EMAIL PROTECTED]: Hi, José María, Have you tried MultiSpec? It allows for establishing a rectangle selection, either manually or by coordinates (rows, cols; degrees or meters) and then saving selection. I vave found it usefull for importing raster selections in QGis Yes, I tried MultiSpec. However, I am a Linux user, and I prefer to use gdal_translate and GRASS for handling raster files. Thank you very much Sergio José María -- Dr. Agustin Lobo Institut de Ciencies de la Terra Jaume Almera (CSIC) LLuis Sole Sabaris s/n 08028 Barcelona Spain Tel. 34 934095410 Fax. 34 934110012 email: [EMAIL PROTECTED] http://www.ija.csic.es/gt/obster ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
