Re: [Qgis-user] use raster + GCP points + ?? as data
On 07/11/2011 10:30 PM, Richard Duivenvoorde wrote: Hi all, I have these pile of scanned old maps and can georeference them with the good working georeferencer plugin in qgis. But do NOT want to really warp the image. Why should we want to store TWO huge rasters, maybe loosing 'data' contained in the 'original'? So my question: is it possible (for Qgis, but preferebly also with other tools (wms's) to load data from the original raster, probably accompanied with a txt file with GCP points (or maybe some other format containing both gcp points and projection/transformation information)? Is there some 'common' way for the the world of gis? Thanks for any thoughts, Richard Duivenvoorde A world file is the common way. It describes the coordinates of the corners, how many units per pixel and what skew if any. See the wikipedia page for details. I believe the georef plugin can save the a world file for you. Thanks, Alex ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] use raster + GCP points + ?? as data
Hi, I would go for GeoTiffs. Store the GCPs inside the Geotiffs (via for example gdal_translate -gcp ...) and when needed, perform the warping (gdalwarp ...). I've no idea other tools support this gcp feature. Kris Original-Nachricht Datum: Mon, 11 Jul 2011 23:27:14 -0700 Von: Alex Mandel tech_...@wildintellect.com An: qgis-user@lists.osgeo.org Betreff: Re: [Qgis-user] use raster + GCP points + ?? as data On 07/11/2011 10:30 PM, Richard Duivenvoorde wrote: Hi all, I have these pile of scanned old maps and can georeference them with the good working georeferencer plugin in qgis. But do NOT want to really warp the image. Why should we want to store TWO huge rasters, maybe loosing 'data' contained in the 'original'? So my question: is it possible (for Qgis, but preferebly also with other tools (wms's) to load data from the original raster, probably accompanied with a txt file with GCP points (or maybe some other format containing both gcp points and projection/transformation information)? Is there some 'common' way for the the world of gis? Thanks for any thoughts, Richard Duivenvoorde A world file is the common way. It describes the coordinates of the corners, how many units per pixel and what skew if any. See the wikipedia page for details. I believe the georef plugin can save the a world file for you. Thanks, Alex ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] use raster + GCP points + ?? as data
On Mon, 11 Jul 2011 23:27:14 -0700, Alex Mandel wrote: On 07/11/2011 10:30 PM, Richard Duivenvoorde wrote: Hi all, I have these pile of scanned old maps and can georeference them with the good working georeferencer plugin in qgis. But do NOT want to really warp the image. Why should we want to store TWO huge rasters, maybe loosing 'data' contained in the 'original'? So my question: is it possible (for Qgis, but preferebly also with other tools (wms's) to load data from the original raster, probably accompanied with a txt file with GCP points (or maybe some other format containing both gcp points and projection/transformation information)? Is there some 'common' way for the the world of gis? Thanks for any thoughts, Richard Duivenvoorde A world file is the common way. It describes the coordinates of the corners, how many units per pixel and what skew if any. See the wikipedia page for details. I believe the georef plugin can save the a world file for you. Thanks, Alex It doesn't enable for all the transformation methods. Richard this choice has a huge trade-off with most formats, the time to resample the raster each time the users move the canvas will not be accepted by them. Storage is cheaper and does not interfere with your users. If the size is a huge issue and not the quality of representation, you can reduce the original resolution. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
RE: [Qgis-user] tools
Sivori, Investiga as ferramentas de topologia do GRASS, que podes usar através do QGIS. Estas ferramentas conseguem detectar dangles, que penso ser o que necessitas. Look at the topology tools in GRASS, that you can use with QGIS. These tools can detect dangle nodes. Duarte De: Sivori Sarti da Silva [mailto:siv...@daer.rs.gov.br] Enviada: segunda-feira, 11 de Julho de 2011 19:15 Para: Qgis-user@lists.osgeo.org Assunto: [Qgis-user] tools Olá pessoal. Existe alguma ferramenta que detecte nós interrompidos em uma rede de polilinhas? Thanks. Tranlate: Hello everybody. Is there any tool that detects nodes stopped in a network of polylines? Thanks. Eng. SÍVORI SARTI DA SILVA Especialista Rodoviário-EC/SPR DAER - Fone 051 3210-5222 ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
RE: [Qgis-user] tools
Investiga as ferramentas de topologia do GRASS, que podes usar através do QGIS. Estas ferramentas conseguem detectar dangles, que penso ser o que necessitas. Look at the topology tools in GRASS, that you can use with QGIS. These tools can detect dangle nodes. the tools are the ones belonging to the v.clean category http://grass.fbk.eu/gdp/html_grass64/v.clean.html cheers -- Giovanni -- ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re:RE: [Qgis-user] tools
Amigo, obrigado pela atenção. Não tenho experiência com as ferramentas do Grass, mas se essa for a solução vou me aprofundar. Breve descrição do problema: Tenho uma rede de rodovias levantada uma a uma por GPS. Ao descarregar no QGis as feições das rodovias muitas vezes não se conectam, prejudicando a malha nodal como um todo. A ferramenta que procuro tem que apontar onde existe uma desconexão, uma descontinuidade, para que eu possa conectá-las. O Grass faz isso? Eng. SÍVORI SARTI DA SILVA Especialista Rodoviário-EC/SPR DAER - Fone 051 3210-5222 - Mensagem Original -Data: Terça-feira, 12 de Julho de 2011 08:45De: Duarte Carreira lt; dcarre...@edia.pt gt;Para: Sivori Sarti da Silva lt; siv...@daer.rs.gov.br gt;, Qgis-user@lists.osgeo.org lt; Qgis-user@lists.osgeo.org gt;Assunto: RE: [Qgis-user] tools Sivori, Investiga as ferramentas de topologia do GRASS, que podes usar através do QGIS. Estas ferramentas conseguem detectar dangles, que penso ser o que necessitas. Look at the topology tools in GRASS, that you can use with QGIS. These tools can detect dangle nodes. Duarte De: Sivori Sarti da Silva [mailto:siv...@daer.rs.gov.br] Enviada: segunda-feira, 11 de Julho de 2011 19:15 Para: Qgis-user@lists.osgeo.org Assunto: [Qgis-user] tools Olá pessoal. Existe alguma ferramenta que detecte nós interrompidos em uma rede de polilinhas? Thanks. Tranlate: Hello everybody. Is there any tool that detects nodes stopped in a network of polylines? Thanks. Eng. SÍVORI SARTI DA SILVA Especialista Rodoviário-EC/SPR DAER - Fone 051 3210-5222 ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] German-language QGIS-usermeeting in Kassel
info in german language Liebe Leute, ich habe gemeinsam mit Otto Dassau ein Programm für das dritte QGIS-Anwendertreffen im deutschsprachigen Raum entworfen. Wir möchten alle Interessierten herzlich zu diesem Treffen einladen. Insbesondere freuen wir uns über Leute, die einen Vortrag (ca. 15- 20 Minuten) über Ihre praktischen Erfahrungen mit QGIS halten möchten. Das Programm gibt es unter: http://cms.uni-kassel.de/asl/fileadmin/daten/Einrichtungen/Geo-Info/konferenz/QGIS_Anwenderkonferenz_Kassel_09_09_2011.pdf Die Anmeldung findet Ihr unter http://cms.uni-kassel.de/asl/fileadmin/daten/Einrichtungen/Geo-Info/konferenz/anmeldung.zip Aktualisierte Infos zum Treffen wird es auf der Seite: http://www.qgis.org/de/anwendertreffen/kassel-092011.html geben Viele Grüße, Claas Leiner -- - Dr.-Ing. Claas Leiner Lehrkraft für Geographische Informationssysteme und Geodaten-Koordinator am FB 06 (ASL) Fachgebiet Ökologische Standort- und Vegetationskunde Universität Kassel Gottschalkstraße 26 a / Raum 1112 34109 Kassel Tel: 0561/804-7196 Mobil: 01525/3876673 claas.lei...@uni-kassel.de http://www.uni-kassel.de/asl/geo-info. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Batch query web database
Not necessarily a qgis question, but one which is in our realm. I have a vector file which contains parcels across a city. In the attribute file of that layer, is the parcel id number. I have a website where I can look up the parcel id number and obtain a host of additional information. I want to append this additional information to my vector attribute table. I imagine there is a way to bulk query all of my parcel ids. I also imagine most websites would prevent people from doing such, but I rather ask than assume. Any solutions come to mind? -- all the best, Lee ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Batch query web database
Perhaps just build an attribute with the link in it? In most cases the atttribute table would be displayed in a seperate window anyway. so if the browser is the seperate window so what? On Tue, Jul 12, 2011 at 12:45 PM, Lee muell...@gmail.com wrote: Not necessarily a qgis question, but one which is in our realm. I have a vector file which contains parcels across a city. In the attribute file of that layer, is the parcel id number. I have a website where I can look up the parcel id number and obtain a host of additional information. I want to append this additional information to my vector attribute table. I imagine there is a way to bulk query all of my parcel ids. I also imagine most websites would prevent people from doing such, but I rather ask than assume. Any solutions come to mind? -- all the best, Lee ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] use raster + GCP points + ?? as data
Date: Tue, 12 Jul 2011 08:53:14 +0200 From: jr.morre...@enoreth.net Subject: Re: [Qgis-user] use raster + GCP points + ?? as data To: qgis-user@lists.osgeo.org Message-ID: e9a67c9a9cbd67859e5f1d072eea6...@enoreth.net Content-Type: text/plain; charset=UTF-8; format=flowed On Mon, 11 Jul 2011 23:27:14 -0700, Alex Mandel wrote: On 07/11/2011 10:30 PM, Richard Duivenvoorde wrote: Hi all, I have these pile of scanned old maps and can georeference them with the good working georeferencer plugin in qgis. But do NOT want to really warp the image. Why should we want to store TWO huge rasters, maybe loosing 'data' contained in the 'original'? So my question: is it possible (for Qgis, but preferebly also with other tools (wms's) to load data from the original raster, probably accompanied with a txt file with GCP points (or maybe some other format containing both gcp points and projection/transformation information)? Is there some 'common' way for the the world of gis? Thanks for any thoughts, Richard Duivenvoorde A world file is the common way. It describes the coordinates of the corners, how many units per pixel and what skew if any. See the wikipedia page for details. I believe the georef plugin can save the a world file for you. Thanks, Alex It doesn't enable for all the transformation methods. In many situations this wouldn't be a problem. Another issue though is that IIRC the georeferencing plugin can't create world files with rotation. Richard this choice has a huge trade-off with most formats, the time to resample the raster each time the users move the canvas will not be accepted by them. Storage is cheaper and does not interfere with your users. If the size is a huge issue and not the quality of representation, you can reduce the original resolution. Personally I haven't been able to detect _any_ slow-down with on-the-fly raster reprojection, which did surprise me. But obviously this can't be a problem if the project coordinate system is the same as the scanned map. Alister ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Open a NetCDF file in QGIS 1.7 - Linux
Good evening. I've been having trouble opening a NetCDF file in the new version of Quantum GIS. How can I proceed? I have to say that I'm using a version for Ubuntu. When I try, the software shows me this message: Cannot get GDAL raster band. Thank you. -- Tássia Penha ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Open a NetCDF file in QGIS 1.7 - Linux
Hi Tássia, You might want to see if gdal is built with netCDF support. Do you see netCDF when you run gdalinfo --formats ? Regards, Bob On Jul 12, 2011 2:56 PM, Tássia Penha tassiape...@gmail.com wrote: Good evening. I've been having trouble opening a NetCDF file in the new version of Quantum GIS. How can I proceed? I have to say that I'm using a version for Ubuntu. When I try, the software shows me this message: Cannot get GDAL raster band. Thank you. -- Tássia Penha ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Batch query web database
I'm not sure I follow. I've never created an attribute with a link. The information on the website can only be obtained one at a time. I need to link ALL of the parcel ID's with ALL of the records, so any time I use the information tool, those records will show up. On Tue, Jul 12, 2011 at 2:43 PM, Brad Nesom gisbrado...@live.com wrote: Perhaps just build an attribute with the link in it? In most cases the atttribute table would be displayed in a seperate window anyway. so if the browser is the seperate window so what? On Tue, Jul 12, 2011 at 12:45 PM, Lee muell...@gmail.com wrote: Not necessarily a qgis question, but one which is in our realm. I have a vector file which contains parcels across a city. In the attribute file of that layer, is the parcel id number. I have a website where I can look up the parcel id number and obtain a host of additional information. I want to append this additional information to my vector attribute table. I imagine there is a way to bulk query all of my parcel ids. I also imagine most websites would prevent people from doing such, but I rather ask than assume. Any solutions come to mind? -- all the best, Lee ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- all the best, Lee ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Customized-QGis for Land Management
Dear QGIS suhu, Where can I find a shortest way to develop QGIS as a main software for Land Management? Im just considering : - design a customized-QGIS - connection with GPS for realtime updating location - storing attribut data into a database system (ex. MS Access) This application will be as Land Management System best regards, -- Yudho Indardjo Freelance GIS Consultant ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
