Re: [Qgis-user] How to identify a raster on the map?
FYI, http://blog.qgis.org/?q=node/104 A ++ Aaron Racicot - GIS Programmer [EMAIL PROTECTED] ++ z - p u l l e y pobox 1614 langley wa 98260 www.reprojected.com ++ _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of andrea pacifici Sent: Friday, January 11, 2008 4:36 AM To: Richard Duivenvoorde Cc: [EMAIL PROTECTED] Subject: Re: [Qgis-user] How to identify a raster on the map? Hi Richard, I'm using Qgis in order to realise a geological map: images will be not distribuited via mapserver. So I actually have more than 200 layers. To create a python plugin for that could be very interesting. But I don't know python language Anyway, I think that the possibility to have a Qgis plugin doing this could be fundamental for those people working with a very large number of raster data (this is the case of people like me working on planetary geology) Thank you very much Andrea 2008/1/11, Richard Duivenvoorde [EMAIL PROTECTED]: Hi Andrea, how did you load these rasters? Every raster in a layer (so you have actually 200 layers)? Or did you generate a tileindex file using gdaltindex and are you serving the rasterimages using mapserver? If the first: it's fun to write a simple python plugin for that, if needed I can give you some help (thinking about: get mouseXY, walk through all layers and check if you are within the bbox of current layer, spit the layername or some other attribute name to std-out (or more fancy: show a dialog).) If the second: as Tim told you: add the indexfile as layer. You can also use that indexfile to serve the rasters via Mapserver then. Building the indexfile and just loading that in Qgis is probably the fastest way. Grtz Richard Duivenvoorde andrea pacifici wrote: Hi, I have a Qgis-GRASS GIS project containing more than 200 rasters: it is a GIS project about a portion of Mars (yes... the planet!). Often, I need to identify the name of one of such rasters just by clicking on it on the map. Which is the best way to do this with Qgis? The Identify button give information on a raster only if the raster it is already selected. There is a plugin to do this? Otherwise, I think the only way is to build a vector layer representing raster footprints, and interrogate it. Thanks Andrea -- _ Dott. Geol. Andrea Pacifici, Ph.D. Via della Billona 1093, 55100 Lucca, Italy Cell. +39328-09918108 E-Mail [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- _ Dott. Geol. Andrea Pacifici, Ph.D. Via della Billona 1093, 55100 Lucca Cell. 328-09918108 E-Mail [EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] How to identify a raster on the map?
Hi Aaron I tried out your plugin - works great! Regards Tim 2008/1/14, Aaron Racicot [EMAIL PROTECTED]: FYI, http://blog.qgis.org/?q=node/104 A ++ Aaron Racicot - GIS Programmer [EMAIL PROTECTED] ++ z - p u l l e y pobox 1614 langley wa 98260 www.reprojected.com ++ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of andrea pacifici Sent: Friday, January 11, 2008 4:36 AM To: Richard Duivenvoorde Cc: [EMAIL PROTECTED] Subject: Re: [Qgis-user] How to identify a raster on the map? Hi Richard, I'm using Qgis in order to realise a geological map: images will be not distribuited via mapserver. So I actually have more than 200 layers. To create a python plugin for that could be very interesting. But I don't know python language Anyway, I think that the possibility to have a Qgis plugin doing this could be fundamental for those people working with a very large number of raster data (this is the case of people like me working on planetary geology) Thank you very much Andrea 2008/1/11, Richard Duivenvoorde [EMAIL PROTECTED]: Hi Andrea, how did you load these rasters? Every raster in a layer (so you have actually 200 layers)? Or did you generate a tileindex file using gdaltindex and are you serving the rasterimages using mapserver? If the first: it's fun to write a simple python plugin for that, if needed I can give you some help (thinking about: get mouseXY, walk through all layers and check if you are within the bbox of current layer, spit the layername or some other attribute name to std-out (or more fancy: show a dialog).) If the second: as Tim told you: add the indexfile as layer. You can also use that indexfile to serve the rasters via Mapserver then. Building the indexfile and just loading that in Qgis is probably the fastest way. Grtz Richard Duivenvoorde andrea pacifici wrote: Hi, I have a Qgis-GRASS GIS project containing more than 200 rasters: it is a GIS project about a portion of Mars (yes... the planet!). Often, I need to identify the name of one of such rasters just by clicking on it on the map. Which is the best way to do this with Qgis? The Identify button give information on a raster only if the raster it is already selected. There is a plugin to do this? Otherwise, I think the only way is to build a vector layer representing raster footprints, and interrogate it. Thanks Andrea -- _ Dott. Geol. Andrea Pacifici, Ph.D. Via della Billona 1093, 55100 Lucca, Italy Cell. +39328-09918108 E-Mail [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- _ Dott. Geol. Andrea Pacifici, Ph.D. Via della Billona 1093, 55100 Lucca Cell. 328-09918108 E-Mail [EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- Tim Sutton QGIS Project Steering Committee Member - Release Manager Visit http://qgis.org for a great open source GIS openModeller Desktop Developer Visit http://openModeller.sf.net for a great open source ecological niche modelling tool Home Page: http://tim.linfiniti.com Skype: timlinux Irc: timlinux on #qgis at freenode.net ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] How to identify a raster on the map?
On Jan 14, 2008 9:36 PM, Aaron Racicot [EMAIL PROTECTED] wrote: http://blog.qgis.org/?q=node/104 Aaron, a note about the implementation: in fact you don't need to implement RasterInfoTool - there's QgsMapToolEmitPoint in gui iibrary which does the same thing :-) Moreover, when reimplementing activate/deactivate functions you should also call parent QgsMapTool::(de)activate function to keep everyone happy. But well, I know... documentation is lacking :-/ Greetings Martin ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] How to identify a raster on the map?
Martin, Thanks for the advice... always welcome and look forward to more! I went ahead and updated the activate and deactivate to call the QgsMapTool.activate(self) and QgsMapTool.deactivate(self) respectively. For now I am just going to leave this as an implementation of a QgsMapTool and will look closer at the QgsMapToolEmitPoint. I have updated the SVN and uploaded a new zip (0.03) to the plugin repository. Thanks again... A ++ Aaron Racicot - GIS Programmer 360.221.2441 - [EMAIL PROTECTED] ++ z - p u l l e y pobox 1614 langley wa 98260 www.reprojected.com ++ -Original Message- From: Martin Dobias [mailto:[EMAIL PROTECTED] Sent: Monday, January 14, 2008 4:34 PM To: Aaron Racicot Cc: [EMAIL PROTECTED] Subject: Re: [Qgis-user] How to identify a raster on the map? On Jan 14, 2008 9:36 PM, Aaron Racicot [EMAIL PROTECTED] wrote: http://blog.qgis.org/?q=node/104 Aaron, a note about the implementation: in fact you don't need to implement RasterInfoTool - there's QgsMapToolEmitPoint in gui iibrary which does the same thing :-) Moreover, when reimplementing activate/deactivate functions you should also call parent QgsMapTool::(de)activate function to keep everyone happy. But well, I know... documentation is lacking :-/ Greetings Martin ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] How to identify a raster on the map?
Hi Andrea, how did you load these rasters? Every raster in a layer (so you have actually 200 layers)? Or did you generate a tileindex file using gdaltindex and are you serving the rasterimages using mapserver? If the first: it's fun to write a simple python plugin for that, if needed I can give you some help (thinking about: get mouseXY, walk through all layers and check if you are within the bbox of current layer, spit the layername or some other attribute name to std-out (or more fancy: show a dialog).) If the second: as Tim told you: add the indexfile as layer. You can also use that indexfile to serve the rasters via Mapserver then. Building the indexfile and just loading that in Qgis is probably the fastest way. Grtz Richard Duivenvoorde andrea pacifici wrote: Hi, I have a Qgis-GRASS GIS project containing more than 200 rasters: it is a GIS project about a portion of Mars (yes... the planet!). Often, I need to identify the name of one of such rasters just by clicking on it on the map. Which is the best way to do this with Qgis? The Identify button give information on a raster only if the raster it is already selected. There is a plugin to do this? Otherwise, I think the only way is to build a vector layer representing raster footprints, and interrogate it. Thanks Andrea -- _ Dott. Geol. Andrea Pacifici, Ph.D. Via della Billona 1093, 55100 Lucca, Italy Cell. +39328-09918108 E-Mail [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
[Qgis-user] How to identify a raster on the map?
Hi, I have a Qgis-GRASS GIS project containing more than 200 rasters: it is a GIS project about a portion of Mars (yes... the planet!). Often, I need to identify the name of one of such rasters just by clicking on it on the map. Which is the best way to do this with Qgis? The Identify button give information on a raster only if the raster it is already selected. There is a plugin to do this? Otherwise, I think the only way is to build a vector layer representing raster footprints, and interrogate it. Thanks Andrea -- _ Dott. Geol. Andrea Pacifici, Ph.D. Via della Billona 1093, 55100 Lucca, Italy Cell. +39328-09918108 E-Mail [EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
Re: [Qgis-user] How to identify a raster on the map?
Hi Andrea The best way to do this would probably to use the gdal shptille utility to build a shapefile that contains indexes to each image.See http://www.gdal.org/gdaltindex.html A plugin like you envisage should be possible but none has been written yet. Regards Tim 2008/1/10, andrea pacifici [EMAIL PROTECTED]: Hi, I have a Qgis-GRASS GIS project containing more than 200 rasters: it is a GIS project about a portion of Mars (yes... the planet!). Often, I need to identify the name of one of such rasters just by clicking on it on the map. Which is the best way to do this with Qgis? The Identify button give information on a raster only if the raster it is already selected. There is a plugin to do this? Otherwise, I think the only way is to build a vector layer representing raster footprints, and interrogate it. Thanks Andrea -- _ Dott. Geol. Andrea Pacifici, Ph.D. Via della Billona 1093, 55100 Lucca, Italy Cell. +39328-09918108 E-Mail [EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user -- Tim Sutton QGIS Project Steering Committee Member - Release Manager Visit http://qgis.org for a great open source GIS openModeller Desktop Developer Visit http://openModeller.sf.net for a great open source ecological niche modelling tool Home Page: http://tim.linfiniti.com Skype: timlinux Irc: timlinux on #qgis at freenode.net ___ Qgis-user mailing list Qgis-user@lists.qgis.org http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-user
